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1. A Rational Solid-State Synthesis of Supported Au–Ni Bimetallic Nanoparticles with Enhanced Activity for Gas-Phase Selective Oxidation of Alcohols

Author:
Yi Wuzhong; Yuan Wentao; Meng Ye; Zou Shihui; Zhou Yuheng; Hong Wei; Che Jianwei; Hao Mengjia; Ye Bin; Xiao Liping; Wang Yong; Kobayashi Hisayoshi; Fan Jie
Source:
ACS applied materials & interfaces 2017 v.9 no.37 pp. 31853-31860
ISSN:
1944-8252
Subject:
aldehydes; annealing; benzyl alcohol; catalysts; gases; gold; nanogold; nanoparticles; nickel; oxidants; oxidation; oxygen; salts; temperature
Abstract:
... A facile confined solid-state seed-mediated alloying strategy is applied for the rational synthesis of supported Au–Ni bimetallic nanoparticles (BMNPs). The method sequentially deposits nickel salts and AuNP seeds into the ordered array of extra-large mesopores (EP-FDU-12 support) followed by a high-temperature annealing process. The size, structure, and composition of the AuNi BMNPs can be well t ...
DOI:
10.1021/acsami.7b08691

2. A bimetallic Au–Ag nanoalloy mounted LDH/RGO nanocomposite: a promising catalyst effective towards a coupled system for the photoredox reactions converting benzyl alcohol to benzaldehyde and nitrobenzene to aniline under visible light

Author:
Mitarani Sahoo; Sriram Mansingh; K. M. Parida
Source:
Journal of materials chemistry A 2019 v.7 no.13 pp. 7614-7627
ISSN:
2050-7496
Subject:
alloy nanoparticles; alloys; aniline; benzaldehyde; benzyl alcohol; crystallization; electrons; gold; graphene oxide; irradiation; lighting; liquids; nanocomposites; nitrobenzenes; photocatalysis; photocatalysts; photoluminescence; protons; redox reactions; reflectance spectroscopy; silver; surface plasmon resonance; ultraviolet radiation
Abstract:
... Achieving organic transformation reactions using green synthesis methods under mild conditions is always an aspiration of scientists. In the present findings, a Zn–Cr layered double hydroxide (LDH)/graphene oxide (GO) nanocomposite modified with Au–Ag noble metal nanoparticles (NPs) was synthesized via the in situ crystallization of a LDH over a GO surface followed by the simultaneous photo-deposi ...
DOI:
10.1039/c8ta10521a

3. A green process for chlorine-free benzaldehyde from the solvent-free oxidation of benzyl alcohol with molecular oxygen over a supported nano-size gold catalyst

Author:
Vasant R. Choudhary; Anirban Dhar; Prabhas Jana; Rani Jha; Balu S. Uphade
Source:
Green chemistry 2005 v.7 no.11 pp. 768-770
ISSN:
1463-9270
Subject:
aluminum oxide; benzaldehyde; benzyl alcohol; catalysts; gold; green chemistry; magnesium oxide; nanogold; oxidation; oxygen; solvents; zirconium oxide
Abstract:
... Benzyl alcohol is oxidized selectively to benzaldehyde with high yield, with a little formation of benzylbenzoate, by molecular oxygen over a reusable nano-size gold catalyst supported on U₃O₈, MgO, Al₂O₃ or ZrO₂ in the absence of any solvent. ...
DOI:
10.1039/b509003b

4. A stable bimetallic Au–Ag/TiO₂ nanopaper for aerobic oxidation of benzyl alcohol

Author:
Yu Guan; Na Zhao; Bin Tang; Qinqin Jia; Xiaohong Xu; Hong Liu; Robert I. Boughton
Source:
Chemical communications 2013 v.49 no.98 pp. 11524-11526
ISSN:
1364-548X
Subject:
benzyl alcohol; catalysts; chemical communication; gold; nanoparticles; oxidation; silver; titanium dioxide
Abstract:
... Well-dispersed small Au–Ag bimetallic nanoparticles (sub-3 nm) on one dimensional TiO₂ nanobelts were synthesized by a facile successive photodeposition-galvanic replacement method. Based on these Au–Ag/TiO₂-NB nanostructures, a porous paper-like monolithic catalyst was fabricated and exhibited synergistically enhanced activity and stability for catalyzing aerobic oxidation of benzyl alcohol. ...
DOI:
10.1039/c3cc45408h

5. A very simple method for the preparation of Au/TiO₂ plasmonic photocatalysts working under irradiation of visible light in the range of 600–700 nm

Author:
Atsuhiro Tanaka; Keiji Hashimoto; Hiroshi Kominami
Source:
Chemical communications 2017 v.53 no.35 pp. 4759-4762
ISSN:
1364-548X
Subject:
benzaldehyde; benzyl alcohol; gold; irradiation; oxidation; photocatalysts; surface plasmon resonance; titanium dioxide
Abstract:
... By using a facile calcination method, we succeeded in the preparation of partially spherical gold particles supported on TiO₂ exhibiting photoabsorption due to surface plasmon resonance at around 620 nm. Surprisingly, the selective oxidation of benzyl alcohol to benzaldehyde occurred in an aqueous suspension of thus-prepared Au/TiO₂ under irradiation of light from a Xe lamp with an R60 cut-off fil ...
DOI:
10.1039/c7cc01444a

6. Aggregation-Free Gold Nanoparticles in Ordered Mesoporous Carbons: Toward Highly Active and Stable Heterogeneous Catalysts

Author:
Wang Shuai; Zhao Qingfei; Wei Huimin; Wang Jian-Qiang; Cho Minhyung; Cho Hae Sung; Terasaki Osamu; Wan Ying
Source:
Journal of the American Chemical Society 2013 v.135 no.32 pp. 11849-11860
ISSN:
1520-5126
Subject:
atmospheric pressure; benzoic acid; benzyl alcohol; carbon; carbonization; catalysts; catalytic activity; composite polymers; gold; green chemistry; leaching; nanogold; nanoparticles; oxygen; porous media; resins; silane; silica; surface area; temperature; thiols
Abstract:
... A coordination-assisted synthetic approach is reported here for the synthesis of highly active and stable gold nanoparticle catalysts in ordered mesoporous carbon materials using triblock copolymer F127 as a structure-directing agent, thiol-containing silane as a coordination agent, HAuCl₄ as a gold source, and phenolic resin as a carbon source. Upon carbonization, the gold precursor becomes reduc ...
DOI:
10.1021/ja403822d

7. An efficient homogeneous gold(I) catalyst for N-alkylation of amines with alcohols by hydrogen autotransfer

Author:
Hongwei Yang; Rongfang Mao; Cuicui Luo; Chunxu Lu; Guangbin Cheng
Source:
Tetrahedron 2014 v.70 pp. 8829-8835
ISSN:
0040-4020
Subject:
benzyl alcohol; catalysts; chemical reactions; chemical structure; gold; hydrogen; primary amines; secondary amines; temperature
Abstract:
... A new and highly efficient homogeneous [Ph3PAuCl]/AgOTf catalytic system was developed in N-alkylation reaction of primary amines with alcohols through a hydrogen autotransfer process. This Au(I) catalytic system shows excellent selectivity for mono-alkylation of primary amines with benzyl alcohol under moderate temperature of 100 °C (only secondary amines as product). The possible mechanism of th ...
DOI:
10.1016/j.tet.2014.10.007

8. Au@UiO-66: a base free oxidation catalyst

Author:
K. Leus; P. Concepcion; M. Vandichel; M. Meledina; A. Grirrane; D. Esquivel; S. Turner; D. Poelman; M. Waroquier; V. Van Speybroeck; G. Van Tendeloo; H. García; P. Van Der Voort
Source:
RSC advances 2015 v.5 no.29 pp. 22334-22342
ISSN:
2046-2069
Subject:
X-ray fluorescence spectroscopy; X-ray photoelectron spectroscopy; benzyl alcohol; catalysts; coordination polymers; crystal structure; gold; hydrogen; molecular dynamics; nanogold; nitrogen; oxidants; oxidation; oxygen; reducing agents; simulation models; sodium borohydride; sorption; transmission electron microscopy; ultraviolet-visible spectroscopy; zirconium
Abstract:
... We present the in situ synthesis of Au nanoparticles within the Zr based Metal Organic Framework, UiO-66. The resulting Au@UiO-66 materials were characterized by means of N₂ sorption, XRPD, UV-Vis, XRF, XPS and TEM analysis. The Au nanoparticles (NP) are homogeneously distributed along the UiO-66 host matrix when using NaBH₄ or H₂ as reducing agents. The Au@UiO-66 materials were evaluated as catal ...
DOI:
10.1039/c4ra16800c

9. Bi doped CeO₂ oxide supported gold nanoparticle catalysts for the aerobic oxidation of alcohols

Author:
Chiranjit Santra; Aline Auroux; Biswajit Chowdhury
Source:
RSC advances 2016 v.6 no.51 pp. 45330-45342
ISSN:
2046-2069
Subject:
X-ray photoelectron spectroscopy; activation energy; benzaldehyde; benzyl alcohol; bismuth; catalysts; catalytic activity; ceric oxide; geraniol; gold; liquids; mass transfer; nanogold; oxidation; oxygen; temperature; transmission electron microscopy
Abstract:
... Gold nanoparticles supported on Bi–CeO₂ with four different bismuth loadings (2 to 8 mol%) were prepared to determine the role of oxide vacancies in doped ceria in the benzyl alcohol oxidation reaction. The catalytic activity was tested for a liquid phase benzyl alcohol oxidation reaction with molecular oxygen under mild conditions of pressure and temperature. The catalytic activity depends on the ...
DOI:
10.1039/c6ra05216a

10. Bimetallic (Au–Cu core)@(ceria shell) nanotubes for photocatalytic oxidation of benzyl alcohol: improved reactivity by Cu

Author:
Beibei Chen; Xiaomin Li; Ruijin Zheng; Ruiping Chen; Xuan Sun
Source:
Journal of materials chemistry A 2017 v.5 no.26 pp. 13382-13391
ISSN:
2050-7496
Subject:
active sites; benzaldehyde; benzyl alcohol; catalysts; ceric oxide; copper; copper nanoparticles; cost effectiveness; gold; nanocomposites; nanotubes; oxidation; oxygen; photocatalysis; surface area
Abstract:
... Supported bimetallic nanocomposites are promising in photocatalysis due to the multi-component interaction between metals and between metals and carriers. By an in situ reduction method, a series of monometallic (Au@CeO₂ and Cu@CeO₂) and bimetallic catalysts (Au₈Cu₂@CeO₂, Au₅Cu₅@CeO₂ and Au₁Cu₉@CeO₂) are obtained, with a metallic core and a CeO₂ shell structure. The in situ reduction method develo ...
DOI:
10.1039/c7ta02047c

11. Bimetallic Gold–Palladium vapour derived catalysts: The role of structural features on their catalytic activity

Author:
Claudio Evangelisti; Eleonora Schiavi; Laura Antonella Aronica; Anna Maria Caporusso; Giovanni Vitulli; Luca Bertinetti; Gianmario Martra; Antonella Balerna; Settimio Mobilio
Source:
Journal of catalysis 2012 v.286 no. pp. 224-236
ISSN:
0021-9517
Subject:
X-ray absorption spectroscopy; acetone; benzyl alcohol; catalysts; catalytic activity; evaporation; gold; nanoparticles; oxidation; oxygen; solvents; titanium; toluene; transmission electron microscopy; vapors
Abstract:
... A procedure to synthesize new Au–Pd bimetallic catalysts using Au and Pd vapours as reagents (metal vapour synthesis, MVS) is reported. The simultaneous co-condensation of Au and Pd vapours with acetone vapour affords Au–Pd/acetone-solvated metal atoms which have been used to deposit Au–Pd bimetallic nanoparticles on γ-alumina and titanium oxide supports. Transmission electron microscopy (TEM) ana ...
DOI:
10.1016/j.jcat.2011.11.007

12. Biogenic flower-shaped Au–Pd nanoparticles: synthesis, SERS detection and catalysis towards benzyl alcohol oxidation

Author:
Daohua Sun; Genlei Zhang; Xinde Jiang; Jiale Huang; Xiaolian Jing; Yanmei Zheng; Jing He; Qingbiao Li
Source:
Journal of materials chemistry A 2014 v.2 no.6 pp. 1767-1773
ISSN:
2050-7496
Subject:
Platycladus orientalis; X-ray diffraction; alloy nanoparticles; alloys; ambient temperature; ascorbic acid; benzaldehyde; benzyl alcohol; catalytic activity; energy-dispersive X-ray analysis; gold; leaf extracts; oxidation; palladium; rhodamines; spectroscopy; transmission electron microscopy
Abstract:
... ∼40 nm flower-shaped Au–Pd bimetallic nanoparticles were prepared in a facile and eco-friendly way based on the simultaneous bioreduction of HAuCl₄ and Na₂PdCl₄ with ascorbic acid and Cacumen Platycladi leaf extract at room temperature. Characterization techniques, such as transmission electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction, were employed to confirm that t ...
DOI:
10.1039/c3ta13922k

13. Biosynthesized Bimetallic Au–Pd Nanoparticles Supported on TiO2 for Solvent-Free Oxidation of Benzyl Alcohol

Author:
Hong Yingling; Jing Xiaolian; Huang Jiale; Sun Daohua; Odoom-Wubah Tareque; Yang Feng; Du Mingming; Li Qingbiao
Source:
ACS sustainable chemistry 2014 v.2 no.7 pp. 1752-1759
ISSN:
2168-0485
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; atmospheric pressure; benzaldehyde; benzyl alcohol; catalysts; catalytic activity; durability; gold; hydroxyl radicals; industrial applications; nanoparticles; oxidation; oxygen; palladium; recycling; temperature; thermogravimetry; titanium dioxide; transmission electron microscopy
Abstract:
... A green bioreductive approach with Cacumen Platycladi (CP) extract was adopted to fabricate bimetallic Au–Pd/TiO₂ catalysts for solvent-free oxidation of benzyl alcohol (BzOH) to benzaldehyde (BzH) with molar oxygen at atmospheric pressure. The Au–Pd nanoparticles (NPs) before being immobilized onto TiO₂ were determined by transmission electron microscopy. And, the catalysts were further analyzed ...
DOI:
10.1021/sc500181z

14. Boosting the catalytic behavior and stability of a gold catalyst with structure regulated by ceria

Author:
Jingjie Luo; Fengxiang Shan; Sihan Yang; Yixue Zhou; Changhai Liang
Source:
RSC advances 2022 v.12 no.3 pp. 1384-1392
ISSN:
2046-2069
Subject:
benzaldehyde; benzyl alcohol; carbon nanotubes; catalysts; catalytic activity; gold; nanogold; oxidation; oxygen
Abstract:
... In this work, a series of colloidal gold nanoparticles with controllable sizes were anchored on carbon nanotubes (CNT) for the aerobic oxidation of benzyl alcohol. The intrinsic influence of Au particles on the catalytic behavior was unraveled based on different nanoscale-gold systems. The Au/CNT-A sample with smaller Au sizes deserved a faster reaction rate, mainly resulting from the higher dispe ...
DOI:
10.1039/d1ra07686h

15. Capping agent-free highly dispersed noble metal nanoparticles supported in ordered mesoporous carbon with short channels and their catalytic applications

Author:
Wenjun Gao; Siwen Li; Manas Pal; Yong Liu; Xiaoyue Wan; Wei Li; Shuai Wang; Changyao Wang; Gengfeng Zheng; Dongyuan Zhao
Source:
RSC advances 2016 v.6 no.66 pp. 61064-61072
ISSN:
2046-2069
Subject:
benzoic acid; benzyl alcohol; carbon; catalysts; catalytic activity; gold; hot water treatment; models; nanogold; nanoparticles; nanospheres; oxidation; oxygen; p-nitrophenol; platinum; porous media; reducing agents
Abstract:
... Homogeneously dispersed small noble metal nanoparticles such as Pt and Au supported on ordered mesoporous carbon nanospheres have been successfully synthesized via a facile hydrothermal method without using any capping agent and further post-treated with reducing agent. The average sizes of the Pt and Au nanoparticles are estimated to be ∼1.7 and ∼5 nm. The small size of the nanoparticles and shor ...
DOI:
10.1039/c6ra10636f

16. Cross-linked chitosan aerogel modified with Au: Synthesis, characterization and catalytic application

Author:
Sajjad Keshipour; Seyyedeh Sahra Mirmasoudi
Source:
Carbohydrate polymers 2018 v.196 pp. 494-500
ISSN:
0144-8617
Subject:
aerogels; benzyl alcohol; butanol; catalysts; catalytic activity; chelating agents; chitosan; crosslinking; ethylbenzene; gold; isopropyl alcohol; oxidation; pentanols
Abstract:
... Dimercaprol as the chelating agent of Au(III) was loaded on chitosan aerogel. Dimercaprol supported on chitosan aerogel efficiently was complexed with Au(III). The new organometallic compound showed good catalytic activity in the oxidation reaction of some aliphatic alcohols, benzyl alcohol, and ethylbenzene. High conversions and excellent selectivities were obtained in the solvent-free oxidation ...
DOI:
10.1016/j.carbpol.2018.05.068

17. Deactivation Behavior of Supported Gold Palladium Nanoalloy Catalysts during the Selective Oxidation of Benzyl Alcohol in a Micropacked Bed Reactor

Author:
Noor Al-Rifai; Peter J. Miedziak; Moataz Morad; Meenakshisundaram Sankar; Conor Waldron; Stefano Cattaneo; Enhong Cao; Samuel Pattisson; David Morgan; Donald Bethell; Graham J. Hutchings; Asterios Gavriilidis
Source:
Industrial & engineering chemistry process design and development 2017 v.56 no.45 pp. 12984-12993
ISSN:
1520-5045
Subject:
Raman spectroscopy; alloy nanoparticles; benzyl alcohol; carbon; catalysts; chlorides; gold; ions; nanogold; oxidation; palladium; process design; transmission electron microscopy
Abstract:
... Highly active, supported Au–Pd catalysts have been tested for catalyzing benzyl alcohol oxidation in a silicon-glass micropacked bed reactor. The effects of Au–Pd composition and anion content during catalyst preparation on catalyst deactivation were studied, and a relationship between the deactivation rate and the amount of Cl– and Au used in the catalyst formulation was found. While Au aids in e ...
DOI:
10.1021/acs.iecr.7b01159

18. Development of Ultrafine Multichannel Microfluidic Mixer for Synthesis of Bimetallic Nanoclusters: Catalytic Application of Highly Monodisperse AuPd Nanoclusters Stabilized by Poly(N-vinylpyrrolidone)

Author:
Hayashi Naoto; Sakai Yuka; Tsunoyama Hironori; Nakajima Atsushi
Source:
Langmuir 2014 v.30 no.34 pp. 10539-10547
ISSN:
1520-5827
Subject:
X-radiation; alloys; benzyl alcohol; chemical composition; gold; magnetism; mixing; nanoparticles; oxidation; spectral analysis; synergism
Abstract:
... On account of their novel properties, bimetallic nanoparticles and nanoclusters (NCs) are strong potential candidates for optical, magnetic, and catalytic functional materials. These properties depend on the chemical composition and size (number of constituent atoms) of the NCs. Control of size, structure, and composition is particularly important for fabricating highly functional materials based ...
DOI:
10.1021/la501642m

19. Effect of alkali and alkaline earth metal ions on benzyl alcohol oxidation activity of titanate nanotube-supported Au catalysts

Author:
Devadutta Nepak; Darbha Srinivas
Source:
RSC advances 2015 v.5 no.59 pp. 47740-47748
ISSN:
2046-2069
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; air; alkali treatment; barium; benzaldehyde; benzyl alcohol; calcium; catalysts; catalytic activity; cesium; desorption; gold; lithium; magnesium; metal ions; nanogold; nanotubes; oxidation; oxygen; palladium; particle size; potassium; reflectance spectroscopy; sodium; solvents; titanium dioxide; transmission electron microscopy; ultraviolet-visible spectroscopy
Abstract:
... Sodium titanate nanotubes (NaTNTs) were prepared by alkali treatment of anatase titania. They were then ion-exchanged with alkali and alkaline earth metal ions to get ATNTs (A = Li⁺, K⁺, Cs⁺, Mg²⁺, Ca²⁺, Sr²⁺and Ba²⁺). Gold (1–5 wt%) was supported on these nanotubes by a deposition–precipitation method and investigated as a catalyst for the selective oxidation of benzyl alcohol with air/molecular ...
DOI:
10.1039/c5ra06496a

20. Efficient imine synthesis from oxidative coupling of alcohols and amines under air atmosphere catalysed by Zn-doped Al2O3 supported Au nanoparticles

Author:
Shipeng Wu; Weixiao Sun; Junjie Chen; Jinghan Zhao; Qiue Cao; Wenhao Fang; Qihua Zhao
Source:
Journal of catalysis 2019 v.377 pp. 110-121
ISSN:
0021-9517
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; additives; air; aluminum oxide; amines; benzaldehyde; benzyl alcohol; carbon dioxide; catalysts; catalytic activity; gold; imines; models; nanogold; nanoparticles; oxidation; oxygen; recycling; synthesis; temperature; transmission electron microscopy; zinc
Abstract:
... Direct oxidative coupling of alcohols and amines is regarded as an effective and green approach for imine synthesis under mild conditions. In this work, Zn-doped γ-Al2O3 supported Au nanoparticles was demonstrated as highly active and selective heterogeneous catalyst for a series of imine productions with good to excellent yields, from alcohols and amines via direct oxidative coupling under air at ...
DOI:
10.1016/j.jcat.2019.07.027

21. Efficient utilization of photogenerated electrons and holes for photocatalytic redox reactions using visible light-driven Au/ZnIn2S4 hybrid

Author:
Taotao Zhu; Xiangju Ye; Qiaoqiao Zhang; Zhenzhen Hui; Xuchun Wang; Shifu Chen
Source:
Journal of hazardous materials 2019 v.367 pp. 277-285
ISSN:
0304-3894
Subject:
benzaldehyde; benzyl alcohol; carbon dioxide; electrons; gold; hydrogen; hydrogen production; irradiation; nanosheets; nitrogen fixation; oxidation; photocatalysis; photocatalysts; protons
Abstract:
... In this study, a new photocatalytic reaction system for simultaneous selective oxidation of aromatic alcohols to corresponding aldehydes and reduction of protons to H2 has been developed. The results reveal that compared with pure ZnIn2S4, the ZnIn2S4 photocatalysts modified with noble metal gold (Au/ZnIn2S4) significantly promote the photocatalytic performance. Among them, the 0.5% Au/ZnIn2S4 nan ...
DOI:
10.1016/j.jhazmat.2018.12.093

22. Facile preparation of Pd/organoclay catalysts with high performance in solvent-free aerobic selective oxidation of benzyl alcohol

Author:
Hu Wang; Shao-Xin Deng; Zhu-Rui Shen; Jin-Gui Wang; Da-Tong Ding; Tie-Hong Chen
Source:
Green chemistry 2009 v.11 no.10 pp. 1499-1502
ISSN:
1463-9270
Subject:
ambient temperature; benzaldehyde; benzyl alcohol; catalysts; gold; green chemistry; nanoparticles; oxidation; palladium; platinum; quaternary ammonium compounds; ruthenium; surfactants
Abstract:
... A facile method to prepare Pd/organoclay catalysts was reported. At room temperature, in H₂PdCl₄ solution the quaternary ammonium surfactant modifiers intercalated in the organoclay adsorbed PdCl₄²⁻ specifically and quickly. After reduction at room temperature, Pd nanoparticles were formed and well-dispersed in the organoclay matrix. The Pd/organoclay catalysts were used in aerobic oxidation of be ...
DOI:
10.1039/b914039p

23. Facile synthesis of polystyrene/gold composite particles as a highly active and reusable catalyst for aerobic oxidation of benzyl alcohol in water

Author:
Yunxing Li; Yan Gao; Cheng Yang; Shengsheng Sha; Jiefu Hao; Yan Wu
Source:
RSC advances 2014 v.4 no.47 pp. 24769-24772
ISSN:
2046-2069
Subject:
air; benzyl alcohol; catalysts; gold; oxidants; oxidation; polystyrenes; potassium carbonate; thermodynamics
Abstract:
... PS/Au composite particles have been synthesized facilely based on a thermodynamic effect. More significantly, the PS/Au composite particles can catalyze the aerobic oxidation of benzyl alcohol remarkably under mild conditions (1 atm, air as oxidant, K₂CO₃, 30 °C, in water) and be reused several times without significant loss of activity. ...
DOI:
10.1039/c4ra01522c

24. Fermi Level Control of Gold Nanoparticle by the Support: Activation of the Catalysis for Selective Aerobic Oxidation of Alcohols

Author:
Naya Shin-ichi; Teranishi Miwako; Aoki Ryo; Tada Hiroaki
Source:
The Journal of Physical Chemistry C 2016 v.120 no.23 pp. 12440-12445
ISSN:
1932-7455
Subject:
X-ray photoelectron spectroscopy; aqueous solutions; benzoic acid; benzyl alcohol; catalytic activity; energy; gold; nanogold; oxidation; particle size; physical chemistry
Abstract:
... Comparable amounts of gold nanoparticles (Au NPs) with varying mean particle size (d) in the range of 2.7 < dAᵤ < 8.4 nm were loaded on various metal oxide supports with dMO > ∼60 nm (Au/MOs) by the heating temperature-varied deposition–precipitation method. The Au 4f X-ray photoelectron spectra for the Au/MOs indicate that the electron density or the Fermi energy level of Au NP can be effectively ...
DOI:
10.1021/acs.jpcc.6b01738

25. Formation of PdO on Au–Pd bimetallic catalysts and the effect on benzyl alcohol oxidation

Author:
Pingping Wu; Yunxiang Cao; Lianming Zhao; Yue Wang; Zhengke He; Wei Xing; Peng Bai; Svetlana Mintova; Zifeng Yan
Source:
Journal of catalysis 2019 v.375 pp. 32-43
ISSN:
0021-9517
Subject:
alloys; benzyl alcohol; catalysts; catalytic activity; electron transfer; gold; nanoparticles; oxidation; palladium; porous media; silica; synergism
Abstract:
... A series of catalysts consisting of gold–palladium bimetallic nanoparticles (Au–Pd NPs in the range of 1–6 nm) anchored on foamlike mesoporous silica were used for the aerobic oxidation of benzyl alcohol. A remarkable synergistic effect was observed on these Au–Pd NP catalysts prepared by a one-pot method. Both experimental and theoretical study revealed a close relationship between the surface Pd ...
DOI:
10.1016/j.jcat.2019.05.003

26. Formation of monometallic Au and Pd and bimetallic Au–Pd nanoparticles confined in mesopores via Ar glow-discharge plasma reduction and their catalytic applications in aerobic oxidation of benzyl alcohol

Author:
Yuanting Chen; Houpeng Wang; Chang-Jun Liu; Zhiyuan Zeng; Hua Zhang; Chunmei Zhou; Xinli Jia; Yanhui Yang
Source:
Journal of catalysis 2012 v.289 no. pp. 105-117
ISSN:
0021-9517
Subject:
benzyl alcohol; catalysts; catalytic activity; gold; hydrogen; nanoparticles; oxidation
Abstract:
... Successfully prepared via Ar glow-discharge plasma reduction, Au–Pd bimetallic nanoparticles were highly active in the selective oxidation of benzyl alcohol, showing a rate constant of 0.50h⁻¹, which was 12.5 and 2× that of Au and Pd monometallic catalysts, respectively. Characterization analyses attributed the enhancement in both activity and selectivity to a Pd-rich shell/Au-rich core structure ...
DOI:
10.1016/j.jcat.2012.01.020

27. Formation of reusable Au-acetonitrile polymers and N-doped graphene catalyst under UV light via submerged liquid plasma process

Author:
Jaganathan Senthilnathan; Kodepelly Sanjeeva Rao; Wan-Hsien Lin; Jyh-Ming Ting; Masahiro Yoshimura
Source:
Journal of materials chemistry A 2015 v.3 no.6 pp. 3035-3043
ISSN:
2050-7496
Subject:
X-ray photoelectron spectroscopy; absorbance; acetonitrile; benzaldehyde; benzyl alcohol; catalysts; catalytic activity; glass; gold; graphene; liquids; nanogold; nanohybrids; nitrogen; oxidation; polymers; transmission electron microscopy; ultraviolet radiation
Abstract:
... In this study, acetonitrile polymers (ANPs) synthesized using a submerged liquid plasma (SLP) process were used for the direct reduction of Au³⁺ under ultraviolet (UV) light without the need for reducing or templating agents. Nitrogen-functionalized graphene (NFG) and ANPs, both synthesized via the SLP process were used to form a Au–ANPs–NFG nanohybrid. The pyridinic and pyrrolic nitrogen present ...
DOI:
10.1039/c4ta05586a

28. Gold nanoparticle supported on ionic liquid-modified graphene oxide as an efficient and recyclable catalyst for one-pot oxidative A³-coupling reaction of benzyl alcohols

Author:
Siyavash Kazemi Movahed; Noushin Farajinia Lehi; Minoo Dabiri
Source:
RSC advances 2014 v.4 no.79 pp. 42155-42158
ISSN:
2046-2069
Subject:
aldehydes; benzyl alcohol; catalysts; gold; graphene oxide; ionic liquids; nanogold
Abstract:
... A novel gold nanoparticle supported on graphene oxide with ionic liquid framework (Au@GO-IL) has been shown to be a highly active and recyclable catalyst for novel domino oxidative A³-coupling reaction that has been successfully developed with benzyl alcohols instead of their corresponding aldehydes in aqueous media. ...
DOI:
10.1039/c4ra05190d

29. Gold nanoparticles supported on magnesium ferrite and magnesium oxide for the selective oxidation of benzyl alcohol

Author:
Edmilson M. de Moura; Marco A. S. Garcia; Renato V. Gonçalves; Pedro K. Kiyohara; Renato F. Jardim; Liane M. Rossi
Source:
RSC advances 2015 v.5 no.20 pp. 15035-15041
ISSN:
2046-2069
Subject:
benzoic acid; benzyl alcohol; catalysts; catalytic activity; ferrimagnetic materials; gold; ions; magnesium; magnesium oxide; nanogold; oxidation; potassium carbonate; sodium hydroxide
Abstract:
... Au nanoparticles (Au NPs) have gained significant attention as catalysts for the selective oxidation of alcohols; however, the catalytic activity is highly dependent on the presence of a base. Alternatives to the use of strong bases, such as NaOH, are still needed. Here, we explored the basicity of magnesium ferrite/oxide supports to study the catalytic behaviour of supported Au NPs for the oxidat ...
DOI:
10.1039/c4ra16159a

30. Gold nanoparticles supported on magnesium oxide as catalysts for the aerobic oxidation of alcohols under alkali-free conditions

Author:
Vinícius V. Costa; Miguel Estrada; Yulia Demidova; Igor Prosvirin; Vladimir Kriventsov; Rafaela F. Cotta; Sergio Fuentes; Andrey Simakov; Elena V. Gusevskaya
Source:
Journal of catalysis 2012 v.292 no. pp. 148-156
ISSN:
0021-9517
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; additives; adsorption; benzyl alcohol; borneol; catalysts; esterification; gold; magnesium oxide; methanol; nanogold; nitrogen; odors; oxidants; oxidation; oxygen; pharmaceutical industry; temperature; transmission electron microscopy; yields
Abstract:
... Gold nanoparticles supported on magnesium oxide were shown to be efficient heterogeneous catalysts for the liquid-phase oxidation of a wide range of alcohols using molecular oxygen as a sole oxidant in the absence of co-catalysts or additives. The Au/MgO material was prepared through the deposition–precipitation method and characterized by XRD, XPS, XAS, HRTEM, UV–Vis spectroscopy, and N₂ adsorpti ...
DOI:
10.1016/j.jcat.2012.05.009

31. Green Photocatalytic Oxidation of Benzyl Alcohol over Noble-Metal-Modified H₂Ti₃O₇ Nanowires

Author:
Mingming Du; Ganning Zeng; Jiale Huang; Daohua Sun; Qingbiao Li; Guoliang Wang; Xiaonian Li
Source:
ACS sustainable chemistry & engineering 2019 v.7 no.10 pp. 9717-9726
ISSN:
2168-0485
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; benzyl alcohol; catalysts; gold; irradiation; nanogold; nanoparticles; nanosilver; nanowires; nitrogen; oxidation; palladium; photocatalysis; reflectance; silver; synergism; transmission electron microscopy
Abstract:
... One-dimensional H₂Ti₃O₇ nanowires (NWs) supported by Au, Ag, and Pd monometallic nanoparticles (NPs) and Au–Pd bimetallic NPs were prepared and used for photochemical benzyl alcohol oxidation. Techniques, such as XRD, TEM, XPS, N₂ physisorption, and diffuse reflectance ultraviolet–visible (DRUV–vis), were used to characterize the obtained catalysts. These results showed that the Pd/H₂Ti₃O₇ NWs cat ...
DOI:
10.1021/acssuschemeng.9b01817

32. Green and Direct Synthesis of Benzaldehyde and Benzyl Benzoate in One Pot

Author:
Mina Ghahremani; Rosaria Ciriminna; Valerica Pandarus; Antonino Scurria; Valeria La Parola; Francesco Giordano; Giuseppe Avellone; Francois Béland; Babak Karimi; Mario Pagliaro
Source:
ACS sustainable chemistry & engineering 2018 v.6 no.11 pp. 15441-15446
ISSN:
2168-0485
Subject:
benzaldehyde; benzyl alcohol; benzyl benzoate; catalysts; gold; nanogold; oxidants; oxygen; porous media
Abstract:
... High yields of valued benzaldehyde and benzyl benzoate are obtained in one pot starting from benzyl alcohol using oxygen as only oxidant under mild conditions (2 bar O₂, 100 °C) along with an ultralow amount (0.02 mol %) of Au nanoparticles heterogenized over a spherical ORMOSIL mesoporous support. The process is remarkably selective and the catalyst is stable. ...
DOI:
10.1021/acssuschemeng.8b03893

33. High performance magnetic separation of gold nanoparticles for catalytic oxidation of alcohols

Author:
Rafael L. Oliveira; Pedro K. Kiyohara; Liane M. Rossi
Source:
Green chemistry 2010 v.12 no.1 pp. 144-149
ISSN:
1463-9270
Subject:
air; benzyl alcohol; carbon; catalysts; catalytic activity; chemical reduction; energy; gold; green chemistry; hydrogen; magnetic separation; magnetism; magnetite; nanogold; nanoparticles; oxidation; particle size; polymers; temperature
Abstract:
... We present the magnetic separation approach to facilitate the recovery of gold nanoparticle (AuNP) catalysts. The use of magnetically recoverable supports for the immobilization of AuNPs instead of traditional oxides, polymers or carbon based solids guarantees facile, clean, fast and efficient separation of the catalyst at the end of the reaction cycle. Magnetic separation can be considered an env ...
DOI:
10.1039/b916825g

34. Highly Crystalline Mesoporous Titania Loaded with Monodispersed Gold Nanoparticles: Controllable Metal–Support Interaction in Porous Materials

Author:
Lei Jin; Ben Liu; Michael E. Louis; Gonghu Li; Jie He
Source:
ACS applied materials & interfaces 2020 v.12 no.8 pp. 9617-9627
ISSN:
1944-8252
Subject:
air; annealing; benzyl alcohol; crystal structure; gold; heat treatment; light; micelles; models; nanogold; oxidation; photocatalysis; photocatalysts; polyethylene glycol; porosity; porous media; silica; surfactants; temperature; thermal stability; titanium dioxide; ultraviolet radiation
Abstract:
... We report the syntheses of mesoporous Au/TiO₂ hybrid photocatalysts with ordered and crystalline frameworks using co-assembly of organosilane-containing colloidal amphiphile micelles (CAMs) and poly(ethylene oxide)-modified gold nanoparticles (AuNPs) as templates. The assembled CAMs can convert to inorganic silica during calcination at elevated temperatures, providing extraordinary thermal stabili ...
DOI:
10.1021/acsami.9b20231

35. Highly efficient visible-light-driven photoelectro-catalytic selective aerobic oxidation of biomass alcohols to aldehydes

Author:
Yajun Zhang; Guohua Zhao; Yanan Zhang; Xiaofeng Huang
Source:
Green chemistry 2014 v.16 no.8 pp. 3860-3869
ISSN:
1463-9270
Subject:
benzaldehyde; benzyl alcohol; biomass; cathodes; ceric oxide; electrochemistry; electrons; gold; green chemistry; irradiation; light; nanoparticles; oxidation; oxygen; photocatalysis; titanium dioxide
Abstract:
... A green and highly efficient visible-light-driven synergistic photoelectrochemical (PEC) catalysis system was systematically demonstrated for selective oxidation of biomass alcohols to the corresponding aldehydes in an O₂ atmosphere under the mild conditions by employing the Au/CeO₂–TiO₂ NTs as photocathodes. Results showed that the conversion of benzyl alcohols was as high as 98% and the selectiv ...
DOI:
10.1039/c4gc00454j

36. Highly selective aerobic oxidation of biomass alcohol to benzaldehyde by an in situ doped Au/TiO₂ nanotube photonic crystal photoanode for simultaneous hydrogen production promotion

Author:
Zhongyi Wu; Jie Wang; Zhaoyu Zhou; Guohua Zhao
Source:
Journal of materials chemistry A 2017 v.5 no.24 pp. 12407-12415
ISSN:
2050-7496
Subject:
benzaldehyde; benzyl alcohol; biomass; cathodes; crystals; energy; fuels; gold; hydrogen; hydrogen production; models; nanogold; nanotubes; oxidation; oxygen; photocatalysis; photons; photovoltaic cells; renewable energy sources
Abstract:
... Photoelectrocatalytic conversion of biomass and its derivatives is a very significant and promising strategy for energy production. The selective oxidation of biomass alcohol to the corresponding aldehydes is an important class of biomass conversion reactions. In this study, a Z-scheme type solar-driven dual photoelectrode photoelectrochemical cell was used for the simultaneous selective oxidation ...
DOI:
10.1039/c7ta03252h

37. Hybrid Au/CuO Nanoparticles: Effect of Structural Features for Selective Benzyl Alcohol Oxidation

Author:
Marcello Marelli; Andrea Jouve; Alberto Villa; Rinaldo Psaro; Antonella Balerna; Laura Prati; Claudio Evangelisti
Source:
Journal of physical chemistry 2019 v.123 no.5 pp. 2864-2871
ISSN:
1932-7455
Subject:
X-ray absorption spectroscopy; benzyl alcohol; carbon; catalytic activity; copper; cupric oxide; energy; gold; nanogold; nanoparticles; oxidation; physical chemistry; synergism; transmission electron microscopy
Abstract:
... Hybrid Au/CuO NPs supported on carbon (Vulcan-XC72) with different Au/Cu molar ratios (i.e., 13/1, 4/1, 1/1, and 1/17) were synthesized by the solvated metal atom dispersion approach. High-resolution transmission electron microscopy, scanning transmission electron microscopy–electron energy loss spectroscopy maps, and extended X-ray absorption fine structure measurements showed the presence of a A ...
DOI:
10.1021/acs.jpcc.8b09449

38. Hybrid Ni–Al layered double hydroxide/graphene composite supported gold nanoparticles for aerobic selective oxidation of benzyl alcohol

Author:
M. Y. Miao; J. T. Feng; Q. Jin; Y. F. He; Y. N. Liu; Y. Y. Du; N. Zhang; D. Q. Li
Source:
RSC advances 2015 v.5 no.45 pp. 36066-36074
ISSN:
2046-2069
Subject:
Raman spectroscopy; X-ray photoelectron spectroscopy; aluminum; benzyl alcohol; catalysts; catalytic activity; chemical reduction; gold; graphene; graphene oxide; moieties; nanocomposites; nanogold; nickel; oxidation; oxygen; particle size; reducing agents
Abstract:
... In this work, a Ni–Al layered double hydroxide/graphene (NiAl-LDH/RGO) nanocomposite which was synthesized by introducing NiAl-LDH on the surface of graphene oxide (GO) and simultaneously reducing graphene oxide without any additional reducing agents was utilized as the support for Au nanoparticles. Raman spectroscopy and XPS analysis revealed that the NiAl-LDH/RGO composite had both defect sites ...
DOI:
10.1039/c5ra05436b

39. Improved Visible-Light Activities of Rutile Nanorod by Comodifying Highly Dispersed Surface Plasmon Resonance Au Nanoparticles and HF Groups for Aerobic Selective Alcohol Oxidation

Author:
Hongwei Lu; Yang Qu; Liqun Sun; Xiaoyu Chu; Jiadong Li; Yanduo Liu; Linlu Bai; Liqiang Jing
Source:
ACS sustainable chemistry & engineering 2018 v.6 no.11 pp. 14652-14659
ISSN:
2168-0485
Subject:
active oxygen species; adsorption; ambient temperature; benzyl alcohol; desorption; gold; nanogold; nanorods; oxidants; oxidation; oxygen; photocatalysts; pollutants; surface area; surface plasmon resonance
Abstract:
... In this work, rutile nanorod comodified by highly dispersed surface plasmon resonance (SPR) Au nanoparticles (NPs) and HF groups exhibits remarkable visible-light activities for the benzyl alcohol oxidation conversion of 90% compared to that (25%) of the unmodified one and the high selectivity (>99%) at room temperature with O₂ as the oxidant. Based on the time-resolved surface photovoltage respon ...
DOI:
10.1021/acssuschemeng.8b03222

40. In Situ Catalysis and Extraction Approach for Fast Evaluation of Heterogeneous Catalytic Efficiency

Author:
Qing Li; Jiankun Huang; Teng Zeng; Xue Zhang; Honglin Li; Congying Wen; Zifeng Yan; Jingbin Zeng
Source:
Analytical chemistry 2020 v.92 no.14 pp. 9989-9996
ISSN:
1520-6882
Subject:
4-chlorophenol; adsorbents; analytical chemistry; benzyl alcohol; catalytic activity; chemical industry; dechlorination; epoxidation reactions; gas chromatography; gold; instrumentation; microparticles; nanocrystals; oxidation; p-nitrophenol; palladium; platinum; silica; styrene; viability
Abstract:
... In situ monitoring of products generated by important heterogeneous catalytic reactions is of great significance for chemical industry, particularly when the products or intermediates are not sufficiently stable or occur at trace-level concentrations. It is therefore highly desirable to develop an integrated in situ catalysis and extraction method, which can simultaneously catalyze the reaction an ...
DOI:
10.1021/acs.analchem.0c01668

41. Insight into the Effective Aerobic Oxidative Cross-Esterification of Alcohols over Au/Porous Boron Nitride Catalyst

Author:
Rong Zhang; Xi Yang; Zheng Tao; Xiao Wang; Huixiang Wang; Liancheng Wang; Baoliang Lv
Source:
ACS applied materials & interfaces 2019 v.11 no.50 pp. 46678-46687
ISSN:
1944-8252
Subject:
activation energy; aluminum oxide; ambient temperature; attitudes and opinions; benzyl alcohol; boron nitride; catalysts; catalytic activity; desorption; free radical scavengers; free radicals; gold; oxygen; reaction mechanisms; ruthenium; spectroscopy; titanium dioxide; vibration
Abstract:
... Boron nitride (BN) has attracted great attention with an unexpected ability in aerobic catalysis. Still, its related probe reactions are relatively rare, and the effect of the BN-supported metal catalyst on O₂ activation is still ambiguous, and opinions are varied. In this work, the porous BN (pBN)-supported Au catalyst with a porous structure and exposed edges exhibits high activity in the oxidat ...
DOI:
10.1021/acsami.9b14460

42. Kinetic Diastereomer Differentiation in Au(III)- and Bi(III)-Catalyzed Benzylic Arylation: Concise and Stereocontrolled Synthesis of 2-Amino-1,1-diarylalkanes

Author:
Chénard Etienne; Hanessian Stephen
Source:
Organic letters 2014 v.16 no.10 pp. 2668-2671
ISSN:
1523-7052
Subject:
Lewis acids; alkanes; aromatic hydrocarbons; arylation; benzyl alcohol; bismuth; catalysts; diastereomers; gold; stereoselective synthesis; stereoselectivity
Abstract:
... Benzylic alcohols carrying an adjacent α-nitro or α-azido group on the alkane chain are converted into syn-1,1-diaryl-2-nitro- and 2-azidoalkanes with electron-rich arenes in stereoselective reactions catalyzed by Brønsted and Lewis acids. Gold(III) chloride and bismuth(III) triflate were found to be especially efficient as catalysts, showing kinetically controlled differentiation in the reactivit ...
DOI:
10.1021/ol500902p

43. Layered double hydroxides supported atomically precise Aun nanoclusters for air oxidation of benzyl alcohol: Effects of size and active site structure

Author:
Yang Xu; Jin Li; Jian Zhou; Yufeng Liu; Zhuojun Wei; Hui Zhang
Source:
Journal of catalysis 2020 v.389 pp. 409-420
ISSN:
0021-9517
Subject:
X-ray photoelectron spectroscopy; active sites; adsorption; air; benzyl alcohol; catalysts; catalytic activity; gold; hydroxides; isotopes; nanogold; nanoparticles; nanosheets; oxidation
Abstract:
... The effects of size and active site structure on catalytic activity were deeply investigated in air oxidation of benzyl alcohol over a series of Ni₃Al-LDH (layered double hydroxides)-supported Auₙ nanocluster (NC) catalysts Auₙ/LDH (n = 25, 38, ~127), obtained by modified electrostatic adsorption of atomically precise Au₂₅Capt₁₈, Au₃₈Capt₂₄ and Au~₁₂₇-Capt (Capt: captopril) NCs followed proper cal ...
DOI:
10.1016/j.jcat.2020.06.017

44. Magnesium surface enrichment of CoFe₂O₄ magnetic nanoparticles immobilized with gold: reusable catalysts for green oxidation of benzyl alcohol

Author:
Wiury C. de Abreu; Marco A. S. Garcia; Sabrina Nicolodi; Carla V. R. de Moura; Edmilson M. de Moura
Source:
RSC advances 2018 v.8 no.7 pp. 3903-3909
ISSN:
2046-2069
Subject:
benzyl alcohol; catalysts; gold; leaching; magnesium; magnesium hydroxide; magnesium oxide; magnetism; nanogold; nanoparticles; oxidants; oxidation; oxygen
Abstract:
... Gold nanoparticles have shown excellent activity for selective oxidation of alcohols; such catalytic systems are highly dependent on the initial activation of the substrates, which must occur on the catalyst surface in heterogeneous catalysts. In many cases, an extra base addition is required, although the basicity of the support may also be of significant importance. Here, we explored the intrins ...
DOI:
10.1039/c7ra13590d

45. Mechanism of selective alcohol oxidation to aldehydes on gold catalysts: Influence of surface roughness on reactivity

Author:
Mercedes Boronat; Avelino Corma; Francesc Illas; Juan Radilla; Tania Ródenas; María J. Sabater
Source:
Journal of catalysis 2011 v.278 no.1 pp. 50-58
ISSN:
0021-9517
Subject:
aldehydes; benzyl alcohol; catalysts; catalytic activity; chemical concentration; gold; magnesium oxide; models; oxidation; particle size; reaction kinetics; surface roughness
Abstract:
... The complete reaction pathway for the selective alcohol oxidation to aldehyde has been obtained from periodic density functional theory (DFT) calculations on a series of catalyst models having Au atoms with different coordination number. A clear trend exists in the reactivity of the surfaces: it increases with decreasing the Au coordination number, suggesting that a distribution of Au sites with d ...
DOI:
10.1016/j.jcat.2010.11.013

46. Metal-Catalyzed Oxa-[4+2] Cyclizations of Quinone Methides with Alkynyl Benzyl Alcohols

Author:
Cong-Shuai Wang; Yu-Chun Cheng; Ji Zhou; Guang-Jian Mei; Shu-Liang Wang; Feng Shi
Source:
Journal of organic chemistry 2018 v.83 no.22 pp. 13861-13873
ISSN:
1520-6904
Subject:
benzyl alcohol; catalysts; catalytic activity; chemical reactions; chemical structure; diastereoselectivity; gold; organic chemistry; quinones
Abstract:
... An oxa-[4+2] cyclization of quinone methides with alkynyl benzyl alcohols has been realized in the presence of a metal catalyst, and the reaction afforded spiroacetal products in overall high yields (up to 99%) and good diastereoselectivities (up to >95:5 dr). By carrying out the reaction under gold catalysis and utilizing alkynyl benzyl alcohols as electron-rich reaction partners, this approach p ...
DOI:
10.1021/acs.joc.8b02186

47. Microstructured Au/Ni-fiber catalyst: Galvanic reaction preparation and catalytic performance for low-temperature gas-phase alcohol oxidation

Author:
Guofeng Zhao; Miaomiao Deng; Yifeng Jiang; Huanyun Hu; Jun Huang; Yong Lu
Source:
Journal of catalysis 2013 v.301 no. pp. 46-53
ISSN:
0021-9517
Subject:
air; benzaldehyde; benzyl alcohol; catalysts; catalytic activity; gold; heat; oxidation; synergism
Abstract:
... The highly active and selective gold catalysts were successfully prepared by galvanically depositing Au onto a thin-sheet microfibrous structure consisting of 5vol.% 8-μm Ni-fiber and 95vol.% voidage, with high heat conductivity and good stability for the gas-phase oxidation of alcohols. The best catalyst was Au-4/Ni-fiber-300 (Au-loading: 4wt%; calcined at 300°C in air), being effective for oxidi ...
DOI:
10.1016/j.jcat.2013.01.020

48. New Reaction Pathway Induced by Plasmon for Selective Benzyl Alcohol Oxidation on BiOCl Possessing Oxygen Vacancies

Author:
Li Hao; Qin Feng; Yang Zhiping; Cui Ximin; Wang Jianfang; Zhang Lizhi
Source:
Journal of the American Chemical Society 2017 v.139 no.9 pp. 3513-3521
ISSN:
1520-5126
Subject:
benzaldehyde; benzyl alcohol; catalysts; electrons; gold; green chemistry; oxidants; oxidation; oxygen; superoxide anion; synergism
Abstract:
... Selective organic transformation under mild conditions constitutes a challenge in green chemistry, especially for alcohol oxidation, which typically requires environmentally unfriendly oxidants. Here, we report a new plasmonic catalyst of Au supported on BiOCl containing oxygen vacancies. It photocatalyzes selective benzyl alcohol oxidation with O₂ under visible light through synergistic action of ...
DOI:
10.1021/jacs.6b12850

49. Nitrogen-Doped Carbon Quantum Dots-Decorated Mg-Al Layered Double Hydroxide-Supported Gold Nanocatalysts for Efficient Base-Free Oxidation of Benzyl Alcohol

Author:
Yujing Guo; Lipeng Fan; Mengran Liu; Lan Yang; Guoli Fan; Feng Li
Source:
Industrial & engineering chemistry process design and development 2019 v.59 no.2 pp. 636-646
ISSN:
1520-5045
Subject:
adsorption; aluminum; benzyl alcohol; carbon quantum dots; catalytic activity; gold; magnesium; nanocatalysts; nanogold; oxidation
Abstract:
... A nitrogen-doped carbon quantum dots (NCDs)-decorated Mg-Al layered double hydroxide (MgAl-LDH)-supported gold nanoparticle (NP) was employed in the aerobic oxidation of benzyl alcohol under solvent-free and base-free conditions. Comprehensive characterizations revealed that the decoration of NCDs improved surface basicity of NCD/MgAl-LDH and was beneficial to the stabilization of gold NPs. Compar ...
DOI:
10.1021/acs.iecr.9b04296

50. Nitrogen-doped graphene stabilized gold nanoparticles for aerobic selective oxidation of benzylic alcohols

Author:
Xiuqiang Xie; Jinlin Long; Jie Xu; Liming Chen; Ying Wang; Zizhong Zhang; Xuxu Wang
Source:
RSC advances 2012 v.2 no.32 pp. 12438-12446
ISSN:
2046-2069
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; atomic force microscopy; benzyl alcohol; catalysts; catalytic activity; gold; graphene; graphene oxide; moieties; nanocomposites; nanogold; nanoparticles; nanosheets; nitrogen; oxidation; oxygen; particle size; thiols; titanium dioxide
Abstract:
... Increasing efforts have been made to fabricate Au/graphene composites due to the fascinating properties of both graphene and gold. Some Au nanoparticles with an average size of tens of nanometers were directly deposited on reduced graphene oxide (RGO), utilizing the residual oxy-functional groups as the “hitching post” of the nanoparticles. Some functional groups, such as amino and thiol, were att ...
DOI:
10.1039/c2ra21291a