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- Author:
- Kuz'min, A.E.; Pichugina, D.A.; Kulikova, M.V.; Dement'eva, O.S.; Nikitina, N.A.; Maksimov, A.L.
- Source:
- Journal of catalysis 2019 v.380 pp. 32-42
- ISSN:
- 0021-9517
- Subject:
- Fischer-Tropsch reaction; X-ray diffraction; carbides; carbon monoxide; catalysts; catalytic activity; iron; nanomaterials; regression analysis; slurries; sorption; thermal degradation
- Abstract:
- ... Features of various Fe-containing nanosized slurry Fischer–Tropsch catalysts, obtained in situ by thermolysis, were investigated experimentally (catalytic tests, XRD, hermomagnetometric methods) and theoretically (DFT ab initio calculations, regression analysis). XRD patterns of the samples reveal the presence of preferentially single Fe₇C₃, Fe₅C₂ and Fe₂C. A quantitative correlation was found bet ...
- DOI:
- 10.1016/j.jcat.2019.09.033
-
https://dx.doi.org/10.1016/j.jcat.2019.09.033
- Author:
- Gu, Q.; Fang, W.-H.; Wischert, R.; Zhou, W-J.; Michel, C.; Pera-Titus, M.
- Source:
- Journal of catalysis 2019 v.380 pp. 132-144
- ISSN:
- 0021-9517
- Subject:
- X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; alloys; carboxylic acids; catalysts; catalytic activity; ceric oxide; copper; copper nanoparticles; energy; engineering; fatty alcohols; gold; hydrogen peroxide; models; nanoceria; nanogold; oxidants; oxidation; polyethylene glycol; transmission electron microscopy
- Abstract:
- ... We describe in this work the preparation of a series of bimetallic Au-Cu catalysts supported over nanoceria for the direct oxidation of C₁₂-C₁₄-alcohol polyethyleneglycol ether with on average 7 ethyl oxide units (AEO7) to polyoxyethylene lauryl ether carboxylic acid (AECA6), using H₂O₂ as an oxidant, under basic conditions. Different preparation methods have been used, including deposition-precip ...
- DOI:
- 10.1016/j.jcat.2019.10.017
-
https://dx.doi.org/10.1016/j.jcat.2019.10.017
- Author:
- Bucciol, F.; Tabasso, S.; Grillo, G.; Menegazzo, F.; Signoretto, M.; Manzoli, M.; Cravotto, G.
- Source:
- Journal of catalysis 2019 v.380 pp. 267-277
- ISSN:
- 0021-9517
- Subject:
- catalysts; catalytic activity; gold; hydrogen; hydrogenation; levulinic acid; microwave treatment; nanogold; oxidation; titanium dioxide; value added; zirconium oxide
- Abstract:
- ... Microwave (MW) -assisted levulinic acid (LA) hydrogenation has been performed over two gold catalysts (commercial 1 wt% Au/TiO₂ by AUROlite™ and 2.5 wt% Au/ZrO₂, prepared using deposition-precipitation). MW-assisted LA hydrogenation was carried out in water and in solvent-free conditions via (i) H-transfer and (ii) molecular H₂. Au/TiO₂ promoted complete LA conversion and the further reduction of ...
- DOI:
- 10.1016/j.jcat.2019.09.041
-
https://dx.doi.org/10.1016/j.jcat.2019.09.041
- Author:
- Zeng, Xin; Wang, Zichun; Ding, Jia; Wang, Leizhi; Jiang, Yijiao; Stampfl, Catherine; Hunger, Michael; Huang, Jun
- Source:
- Journal of catalysis 2019 v.380 pp. 9-20
- ISSN:
- 0021-9517
- Subject:
- Bronsted acids; Lewis bases; X-ray diffraction; acidity; alkylation; benzene; benzyl alcohol; benzylation; biorefining; catalysts; catalytic activity; feedstocks; lignocellulose; micropores; moieties; molecular weight; nuclear magnetic resonance spectroscopy; porosity; porous media; toluene; transmission electron microscopy; xylene; zeolites
- Abstract:
- ... Renewable arenes and aromatic alcohols can be derived from lignocellulose by biorefineries, which has been considered as a sustainable alternative to replace petrochemical feedstocks in the synthesis of monobenzylation products, key industrial intermediates, via benzylation reactions. Zeolites with micropores are the most widely used catalysts in the benzylation of arenes, however, their performan ...
- DOI:
- 10.1016/j.jcat.2019.09.035
-
https://dx.doi.org/10.1016/j.jcat.2019.09.035
- Author:
- Tang, Zhaocheng; Li, Jia; Lin, Fulin; Bao, Wenhao; Zhang, Shiwei; Guo, Baodang; Huang, Shuping; Zhang, Yan; Rao, Yijian
- Source:
- Journal of catalysis 2019 v.380 pp. 1-8
- ISSN:
- 0021-9517
- Subject:
- Cercospora; anions; fermentation; organic halogen compounds; photocatalysis; photocatalysts; pigments; plant pathogenic fungi; spectroscopy
- Abstract:
- ... Bioinspired by the naturally-occurring cercosporin-driven infection process of plant pathogenic fungi Cercospora sp., here we took advantage of the photophysical properties of cercosporin, and used it as a metal-free photocatalyst to develop an unprecedented cercosporin-driven photocatalysis under mild conditions. Furthermore, the forming conditions and excited-state dynamics of radical anions of ...
- DOI:
- 10.1016/j.jcat.2019.09.036
-
https://dx.doi.org/10.1016/j.jcat.2019.09.036
- Author:
- Heracleous, E.; Pachatouridou, E.; Hernández-Giménez, A.M.; Hernando, H.; Fakin, T.; Paioni, A.L.; Baldus, M.; Serrano, D.P.; Bruijnincx, P.C.A.; Weckhuysen, B.M.; Lappas, A.A.
- Source:
- Journal of catalysis 2019 v.380 pp. 108-122
- ISSN:
- 0021-9517
- Subject:
- Bronsted acids; air; biomass; catalysts; catalytic activity; catalytic cracking; egg shell; fluorescence microscopy; oxidation; pyrolysis; temperature; zeolites; zirconium oxide
- Abstract:
- ... A major issue in the catalytic fast pyrolysis (CFP) of biomass is the rapid deactivation of the typically employed zeolite-based catalysts. Detailed understanding of the deactivation pathways and the type and location of coke deposits are essential for the further development of improved or new catalyst materials, including appropriate regeneration protocols. Such deactivation and regeneration stu ...
- DOI:
- 10.1016/j.jcat.2019.10.019
-
https://dx.doi.org/10.1016/j.jcat.2019.10.019
- Author:
- Sidorenko, A.Yu.; Kravtsova, A.V.; Il'ina, I.V.; Wärnå, J.; Korchagina, D.V.; Gatilov, Yu.V.; Volcho, K.P.; Salakhutdinov, N.F.; Murzin, D.Yu.; Agabekov, V.E.
- Source:
- Journal of catalysis 2019 v.380 pp. 145-152
- ISSN:
- 0021-9517
- Subject:
- acetone; acidity; alcohols; aldehydes; antiviral properties; byproducts; carbonyl compounds; catalysts; catalytic activity; halloysite; heterocyclic compounds; hydrochloric acid; hydrolysis; models; nanotubes; stereoselectivity; temperature; terpenoids
- Abstract:
- ... Natural halloysite nanotubes (HNT) pretreated with hydrochloric acid were applied for the first time for selective synthesis of octahydro-2H-chromenols (as 4R- and 4S-diastereomers) using terpenoid (-)-isopulegol and ketones as reactants. The main attention was paid to the reaction with acetone, because the resulting 4R-isomer displays antiviral activity. While the drawback of the isopulegol Prins ...
- DOI:
- 10.1016/j.jcat.2019.10.015
-
https://dx.doi.org/10.1016/j.jcat.2019.10.015
- Author:
- Gao, Chen; Xiao, Bing; Shi, Jian-Wen; He, Chi; Wang, Baorui; Ma, Dandan; Cheng, Yonghong; Niu, Chunming
- Source:
- Journal of catalysis 2019 v.380 pp. 55-67
- ISSN:
- 0021-9517
- Subject:
- adsorption; ammonia; catalysts; catalytic activity; chemical reduction; dysprosium; iron; manganese; nanowires; nitric oxide; oxygen
- Abstract:
- ... Recently, Mn-based catalysts doped/modified by rare earth elements for the selective catalytic reduction (SCR) of NOₓ with NH₃ are becoming a new research hotspot. In current work, Dy-doped MnFe oxides with the morphology of one-dimensional nanowire are successfully prepared by using electrospinning method for the first time, and the catalytic performances for the NH₃-SCR of NOₓ are investigated i ...
- DOI:
- 10.1016/j.jcat.2019.10.003
-
https://dx.doi.org/10.1016/j.jcat.2019.10.003
- Author:
- Xin, Huiyue; Xue, Yujie; Zhang, Wenbo; Wu, Peng; Li, Xiaohong
- Source:
- Journal of catalysis 2019 v.380 pp. 254-266
- ISSN:
- 0021-9517
- Subject:
- X-ray photoelectron spectroscopy; active sites; alcohols; catalysts; catalytic activity; glucose; hydrogenation; kinetics; models; moieties; nanoparticles; oxides; platinum; sol-gel processing; temperature
- Abstract:
- ... CoₓFe₁₋ₓAl₂O₄₊δ composite oxides were prepared using a sol-gel method with glucose as hard template. Pt nanoparticles supported on CoₓFe₁₋ₓAl₂O₄₊δ were employed for the liquid-phase selective hydrogenation of cinnamaldehyde (CAL) to yield the desired cinnamyl alcohol (COL). The activity increased with the x value; while the selectivity to COL almost kept above 90% despite of different x values. Up ...
- DOI:
- 10.1016/j.jcat.2019.09.042
-
https://dx.doi.org/10.1016/j.jcat.2019.09.042
- Author:
- Kordnezhadian, Reza; Shekouhy, Mohsen; Karimian, Somaye; Khalafi-Nezhad, Ali
- Source:
- Journal of catalysis 2019 v.380 pp. 91-107
- ISSN:
- 0021-9517
- Subject:
- Fourier transform infrared spectroscopy; X-ray diffraction; catalysts; catalytic activity; hematite; liquids; magnetism; nanomaterials; porous media; pyrimidines; quinolines; scanning electron microscopy; toxicity; transmission electron microscopy
- Abstract:
- ... DBU-functionalized MCM-41-coated nanosized hematite (DBU-F-MCM-41-CNSH) was successfully prepared as a new magnetically separable and reusable mesoporous basic nanocatalyst and characterized by various techniques such as FT-IR, XRD, HR-TEM, FESEM, BET, VSM and elemental analyses (CHN and ICP-OES). The prepared nanocatalyst was then successfully applied for the synthesis of some nucleoside-containi ...
- DOI:
- 10.1016/j.jcat.2019.10.020
-
https://dx.doi.org/10.1016/j.jcat.2019.10.020
- Author:
- Zakavi, Saeed; Naderloo, Mortaza; Heydari-turkmani, Akram; Alghooneh, Leila; Eskandari, Mortaza
- Source:
- Journal of catalysis 2019 v.380 pp. 236-246
- ISSN:
- 0021-9517
- Subject:
- absorption; acids; bromination; fluorescence; moieties; oxidation; oxidative stability; photocatalysis; photosensitizing agents; porphyrins; protonation; singlet oxygen; therapeutics; wavelengths
- Abstract:
- ... In this study, a series of β-brominated meso-tetraphenylporphyrins, H₂TPPBrₓ (x = 2, 4, 6 and 8) with remarkably red shifted absorption bands towards the longer wavelengths of the visible light known as therapeutic window and their diprotonated analogues were used as photosensitizers in the aerobic oxidation of cyclooctene to investigate the influence of degree of β bromination on the photocatalyt ...
- DOI:
- 10.1016/j.jcat.2019.10.005
-
https://dx.doi.org/10.1016/j.jcat.2019.10.005
- Author:
- Yu, Xinbin; Vest, Trey A.; Gleason-Boure, Nicolas; Karakalos, Stavros G.; Tate, Gregory L.; Burkholder, Michael; Monnier, John R.; Williams, Christopher T.
- Source:
- Journal of catalysis 2019 v.380 pp. 289-296
- ISSN:
- 0021-9517
- Subject:
- catalysts; copper; ethylene glycol; gelation; hydrogen; hydrogenation; indium; oxalates; silica; synthesis gas
- Abstract:
- ... Hydrogenation of dimethyl oxalate (DMO) on Cu/SiO₂ catalysts is the final reaction step in a growing industrial syngas to ethylene glycol (StEG) process. In the present work, indium species are found to dramatically enhance the performance of a Cu/SiO₂ catalyst prepared by urea-assisted gelation for the conversion of DMO to EG. Characterization reveals that indium species have negligible effect on ...
- DOI:
- 10.1016/j.jcat.2019.10.001
-
https://dx.doi.org/10.1016/j.jcat.2019.10.001
- Author:
- Qin, Yuan; Wang, Hui; Dong, Cui; Qu, Zhenping
- Source:
- Journal of catalysis 2019 v.380 pp. 21-31
- ISSN:
- 0021-9517
- Subject:
- active oxygen species; catalysts; catalytic activity; manganese oxides; oxidation; oxygen; reaction mechanisms; silver; stable isotopes; temperature; toluene
- Abstract:
- ... An investigation of the effect of oxygen and silver species on the oxidation of toluene has been launched to identify the reaction process and mechanism over MnOₓ/SBA-15 and Ag–MnOₓ/SBA-15 catalysts. Detailed knowledge of the effect and cycle of oxygen species under reaction is typically missing, and this study points at the behavior of oxygen species over MnOₓ/SBA-15 for toluene oxidation for the ...
- DOI:
- 10.1016/j.jcat.2019.09.027
-
https://dx.doi.org/10.1016/j.jcat.2019.09.027
- Author:
- Zugic, Branko; van Spronsen, Matthijs A.; Heine, Christian; Montemore, Matthew M.; Li, Yuanyuan; Zakharov, Dmitri N.; Karakalos, Stavros; Lechner, Barbara A.J.; Crumlin, Ethan; Biener, Monika M.; Frenkel, Anatoly I.; Biener, Juergen; Stach, Eric A.; Salmeron, Miquel B.; Kaxiras, Efthimios; Madix, Robert J.; Friend, Cynthia M.
- Source:
- Journal of catalysis 2019 v.380 pp. 366-374
- ISSN:
- 0021-9517
- Subject:
- alloys; carbon dioxide; catalysts; catalytic activity; formates; gold; methanol; nanogold; nanopores; nanosilver; oxidation; oxygen; ozone; silver; temperature
- Abstract:
- ... Activating pretreatments are used to tune surface composition and structure of bimetallic-alloy catalysts. Herein, the activation-induced changes in material properties of a nanoporous Ag₀.₀₃Au₀.₉₇ alloy and their subsequent evolution under steady-state CH₃OH oxidation conditions are investigated. Activation using O₃ results in AgO and Au₂O₃, strongly enriching the near-surface region in Ag. These ...
- DOI:
- 10.1016/j.jcat.2019.08.041
-
https://dx.doi.org/10.1016/j.jcat.2019.08.041
- Author:
- Dahnum, Deliana; Seo, Bora; Cheong, Seok-Hyeon; Lee, Ung; Ha, Jeong-Myeong; Lee, Hyunjoo
- Source:
- Journal of catalysis 2019 v.380 pp. 297-306
- ISSN:
- 0021-9517
- Subject:
- Lewis acids; X-ray photoelectron spectroscopy; adsorption; aniline; benzimidazole; carbon dioxide; carbonates; catalysts; crystal structure; hydrogen; imidazole; leaching; methylation; moieties; nuclear magnetic resonance spectroscopy; scanning electron microscopy; temperature; transmission electron microscopy; zinc
- Abstract:
- ... The Zeolitic Imidazole Framework ZIF-7, (Zn(benzimidazole)₂), is known to exhibit a unique gate-opening property depending on the temperature and pressure in the presence of guest molecules, making it useful for H₂, CO₂, and paraffine separation technology. Besides this distinctive gas adsorption property, ZIF-7 can be used as a catalyst because it contains a Lewis acid site on Zn, and a Lewis bas ...
- DOI:
- 10.1016/j.jcat.2019.09.039
-
https://dx.doi.org/10.1016/j.jcat.2019.09.039
- Author:
- Xiao, Ping; Buijnsters, Josephus G.; Zhao, Yanxi; Yu, Huan; Xu, Xuelian; Zhu, Yujun; Tang, Duihai; Zhu, Junjiang; Zhao, Zhen
- Source:
- Journal of catalysis 2019 v.380 pp. 215-223
- ISSN:
- 0021-9517
- Subject:
- active sites; catalysts; catalytic activity; electrochemistry; hydrogen; hydrogen production; nanoparticles; palladium; platinum; reaction mechanisms; renewable energy sources; sulfuric acid; tungsten oxide
- Abstract:
- ... Hydrogen is the most desirable green energy carrier and electrocatalytic hydrogen evolution reaction (HER) from water is a promising route for hydrogen production. The search for efficient, low-cost HER catalysts is a challenging and attracting topic. In this work, we report that inorganic fullerene-like WS₂ supported Pd nanoparticles (Pd/WS₂), with Pd loading of 0.76 wt%, are active for electroca ...
- DOI:
- 10.1016/j.jcat.2019.10.007
-
https://dx.doi.org/10.1016/j.jcat.2019.10.007
- Author:
- Ou, Chun-Chang; Chen, Chia-Han; Chan, Ting-Shan; Chen, Ching-Shiun; Cheng, Soofin
- Source:
- Journal of catalysis 2019 v.380 pp. 43-54
- ISSN:
- 0021-9517
- Subject:
- Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; atomic absorption spectrometry; catalysts; catalytic activity; ceric oxide; energy-dispersive X-ray analysis; formaldehyde; hydrogen; moieties; nanoparticles; nanosilver; oxidation; oxygen; particle size; protons; reflectance; silver; temperature; transmission electron microscopy
- Abstract:
- ... Silver supported on CeO₂ nanoparticles (Ag/CeO₂) was found to be an efficient catalyst for formaldehyde removal at low temperature. The activity of Ag/CeO₂ catalysts in HCHO oxidation was markedly influenced by pretreatment at different calcination temperatures and H₂ reduction. A 6 wt%Ag/CeO₂ catalyst calcined at 573 K and then reduced at 473 K with 10% H₂/N₂ showed 100% conversion of 400 ppm for ...
- DOI:
- 10.1016/j.jcat.2019.09.028
-
https://dx.doi.org/10.1016/j.jcat.2019.09.028
- Author:
- Gueye, Ibrahima; Kim, Jaemyung; Kumara, L.S.R.; Yang, Anli; Seo, Okkyun; Chen, Yanna; Song, Chulho; Hiroi, Satoshi; Kusada, Kohei; Kobayashi, Hirokazu; Kitagawa, Hiroshi; Sakata, Osami
- Source:
- Journal of catalysis 2019 v.380 pp. 247-253
- ISSN:
- 0021-9517
- Subject:
- X-ray photoelectron spectroscopy; adsorption; alloy nanoparticles; carbon dioxide; carbon monoxide; catalytic activity; oxygen; polyvinylpyrrolidone; ruthenium
- Abstract:
- ... We investigated the crucial relation between the intrinsic electronic structure and surface chemisorption behavior of prototypical Ruthenium nanoparticles (Ru NPs) by tuning the size (from 2.2 to 5.4 nm) and structure (face centered cubic (fcc) and hexagonal close packed (hcp)). Ru NPs covered with a polyvinylpyrrolidone (PVP) was analysed through the synchrotron-based hard X-ray photoelectron spe ...
- DOI:
- 10.1016/j.jcat.2019.10.004
-
https://dx.doi.org/10.1016/j.jcat.2019.10.004
- Author:
- Harris, James W.; Bhan, Aditya
- Source:
- Journal of catalysis 2019 v.380 pp. 318-331
- ISSN:
- 0021-9517
- Subject:
- aluminum oxide; carbon dioxide; catalysts; catalytic activity; chemical bonding; chlorides; chlorine; dissociation; enthalpy; epoxidation reactions; ethylene; ethylene oxide; gases; isotopes; kinetics; organochlorine compounds; oxidation; oxygen; propane; silver
- Abstract:
- ... High partial oxidation selectivity in ethylene oxidation over Ag catalysts is achieved in part via the presence of adsorbed chlorine promoters. Chlorine coverage during ethylene oxidation is maintained by co-feeding organic chlorides in ppm levels and alkane moderators in concentrations of ~0.5 mol%. The relative efficacy of organic chlorides in Cl deposition and of alkanes in Cl removal is typica ...
- DOI:
- 10.1016/j.jcat.2019.09.037
-
https://dx.doi.org/10.1016/j.jcat.2019.09.037
- Author:
- Corral-Pérez, Juan José; Copéret, Christophe; Urakawa, Atsushi
- Source:
- Journal of catalysis 2019 v.380 pp. 153-160
- ISSN:
- 0021-9517
- Subject:
- acidity; aluminum oxide; carbon dioxide; catalysts; catalytic activity; formates; hydrogenation; methanol; nanosilver; silica; silver; temperature; zirconium oxide
- Abstract:
- ... Silica-supported silver nanoparticles exhibit outstanding efficiency in the CO₂ hydrogenation to methyl formate in the presence of methanol under high pressure. Here, we show that ZrO₂ and Al₂O₃ supports significantly increase the catalyst activity, in line with their higher Lewis acidity. The weight time yield of methyl formate over Ag/ZrO₂ is up to 16.2 gMF gAg h⁻¹ without detectable side-produc ...
- DOI:
- 10.1016/j.jcat.2019.10.013
-
https://dx.doi.org/10.1016/j.jcat.2019.10.013