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You searched for: Journal name Journal of catalysis Remove constraint Journal name: Journal of catalysis Publication year rev 7980-2020 Remove constraint Publication year rev: 7980-2020 Source 2020 v.392 Remove constraint Source: 2020 v.392
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1. Au(III) catalyzes the cross-coupling between activated methylenes and alkene derivatives

Author:
Marta Castiñeira Reis; Marta Marín-Luna; Nenad Janković; Olalla Nieto Faza; Carlos Silva López
Source:
Journal of catalysis 2020 v.392 pp. 159-164
ISSN:
0021-9517
Subject:
catalysts; catalytic activity; couplings; cross-coupling reactions; hardness
Abstract:
... In the last decade substantial efforts were devoted towards the exploitation of the Au(I) as a promising tool to promote CC bond formation reactions via the activation of unsaturations. Among these efforts, Au(I)/Au(III) cross couplings mediated by a co-oxidant or by photoactivation sit at a privileged position. Au(III) has also shown a rich chemistry but, due to its hardness and lower affinity fo ...
DOI:
10.1016/j.jcat.2020.09.030

2. Calorimetric metal vapor adsorption energies for characterizing industrial catalyst support materials

Author:
Wei Zhang; Charles T. Campbell
Source:
Journal of catalysis 2020 v.392 pp. 209-216
ISSN:
0021-9517
Subject:
adhesion; adsorption; calcium; calorimeters; calorimetry; catalysts; catalytic activity; detection; energy; environmental technology; films (materials); heat; liquids; nanoparticles; nanosheets; solutions; sounds; standard deviation; surfaces; vapors
Abstract:
... Many important catalysts and electro-catalysts for energy and environmental technologies involve late transition metal atoms and nanoparticles dispersed across the surface of high-surface-area support materials, for example, oxide nanoparticles. The surface reactivity and long-term stability against deactivation of these materials depends strongly on the strength of bonding of the metal atom and n ...
DOI:
10.1016/j.jcat.2020.09.022

3. Chromium(III) catalysts based on tridentate silicon-bridged tris(diphenylphosphine) ligands for selective ethylene tri-/tetramerization

Author:
Fakhre Alam; Jiadong Wang; Chunhua Dong; Qiqi Chang; Le Zhang; Qiyao Zhang; Yanhui Chen; Tao Jiang
Source:
Journal of catalysis 2020 v.392 pp. 278-286
ISSN:
0021-9517
Subject:
catalysts; catalytic activity; chromium; ethylene; ligands; liquids; mass spectrometry; moieties; oligomerization; pH; phosphorus; silicon; thermodynamics
Abstract:
... The chromium(III) catalysts based on tridentate silicon-bridged tris(diphenylphosphine) ligands of the form RSi(CH₂PPh₂)₃ (L¹: R = Me; L²: R = Cy; L³: R = Ph) were investigated for selective ethylene tri-/tetramerization. The steric and electronic properties of the substituents attached to the silicon moiety have been observed to have a great impact on the catalytic performance of these catalysts. ...
DOI:
10.1016/j.jcat.2020.10.008

4. Improving alkaline hydrogen evolution reaction kinetics on molybdenum carbide: Introducing Ru dopant

Author:
Jiadong Chen; Chunhong Chen; Yuzhuo Chen; Haiyan Wang; Shanjun Mao; Yong Wang
Source:
Journal of catalysis 2020 v.392 pp. 313-321
ISSN:
0021-9517
Subject:
adsorption; carbon nitride; catalytic activity; density functional theory; dissociation; energy; graphene; hydrogen production; kinetics; molybdenum; nanoparticles; nanosheets; reaction kinetics; water
Abstract:
... Hydrogen evolution reaction (HER) under alkaline media plays a pivotal role in industrial electrocatalytic hydrogen production but even the platinum-based electrocatalysts suffer from high overpotential and low kinetics due to the high energy barrier of water dissociation. Here, by employing in-situ produced graphitic carbon nitride (g-C₃N₄) as template to induce the formation of a lamellar struct ...
DOI:
10.1016/j.jcat.2020.10.020

5. Methane dry reforming on supported cobalt nanoparticles promoted by boron

Author:
Abdullah J. Al Abdulghani; Jung-Hyun Park; Sergey M. Kozlov; Dong-Chang Kang; Bedour AlSabban; Srikanth Pedireddy; Antonio Aguilar-Tapia; Samy Ould-Chikh; Jean-Louis Hazemann; Jean-Marie Basset; Luigi Cavallo; Kazuhiro Takanabe
Source:
Journal of catalysis 2020 v.392 pp. 126-134
ISSN:
0021-9517
Subject:
boron; carbon; carbon dioxide; catalysts; catalytic activity; cobalt; density functional theory; design; dissociation; industrial applications; methane; nanoparticles; oxygen; partial pressure; surfaces; synthesis gas
Abstract:
... Stable operations for catalytic dry reforming of methane (DRM) are essential for industrial applications. High stability for syngas production can be achieved via a kinetic balance between formation of carbon species and their removal by oxygen species on the metal surface, which clears the surface for further reaction steps. This study reports highly stable performance by a boron-doped cobalt cat ...
DOI:
10.1016/j.jcat.2020.09.015

6. Stepwise construction of silica-supported tantalum/iridium heteropolymetallic catalysts using surface organometallic chemistry

Author:
Sébastien Lassalle; Ribal Jabbour; Iker Del Rosal; Laurent Maron; Emiliano Fonda; Laurent Veyre; David Gajan; Anne Lesage; Chloé Thieuleux; Clément Camp
Source:
Journal of catalysis 2020 v.392 pp. 287-301
ISSN:
0021-9517
Subject:
active sites; alkanes; catalysts; catalytic activity; exhibitions; iridium; molecular models; silica; spectroscopy; tantalum
Abstract:
... A stepwise surface organometallic chemistry (SOMC) methodology consisting in using a silica-supported tantalum species, [(≡SiO)Ta(CHᵗBu)(CH₂ᵗBu)₂], as a reactive center to coordinate an iridium site, was developed to construct tantalum/iridium heterobimetallic edifices. The resulting material, MAT-2, exhibits enhanced catalytic performances - both in H/D isotopic exchange and alkane metathesis rea ...
DOI:
10.1016/j.jcat.2020.10.016

7. A hydrazone-based covalent organic framework/iridium (III) complex for photochemical CO2 reduction with enhanced efficiency and durability

Author:
Si-Qi You; Jie Zhou; Meng-Meng Chen; Chun-Yi Sun; Xiang-Juan Qi; Afifa Yousaf; Xin-Long Wang; Zhong-Min Su
Source:
Journal of catalysis 2020 v.392 pp. 49-55
ISSN:
0021-9517
Subject:
absorption; carbon dioxide; durability; electron transfer; fluorescence; iridium; irradiation; photocatalysis; photocatalysts; photoluminescence; photosensitizing agents; separation; solar radiation
Abstract:
... Metal complexes have been one of the most promising photocatalysts for highly selective conversion of CO₂ to carbon-based products. However, the aggregation-induced deactivation and narrow absorption range of sunlight impede their catalytic performance. Here, a heterogeneous photocatalytic system with a hydrazone-based covalent organic framework (COF) as photosensitizer and a metal complex [Ir-ppy ...
DOI:
10.1016/j.jcat.2020.09.029

8. Catalysis in polymerization of cyclic esters. Catalyst and initiator in one molecule. Polymerization of ε-caprolactone

Author:
Krzysztof Kaluzynski; Julia Pretula; Piotr Lewinski; Sławomir Kaźmierski; Stanislaw Penczek
Source:
Journal of catalysis 2020 v.392 pp. 97-107
ISSN:
0021-9517
Subject:
biodegradability; catalytic activity; esters; kinetics; molecular weight; organocatalysts; phosphorous acid; polymerization; polymers
Abstract:
... This study demonstrates that in the cationic ring-opening polymerization of cyclic esters, leading to biocompatible and biodegradable polymers, catalyst and initiator could be efficient when are in the same molecule (CINICAT). This is in contrast to the known processes when organocatalysts (e.g., protonic acids) require addition of an independent initiator and then low molar mass catalyst is left ...
DOI:
10.1016/j.jcat.2020.09.026

9. Catalysis of oxygen reduction reaction for H2O2 electrogeneration: The impact of different conductive carbon matrices and their physicochemical properties

Author:
Paulo Jorge Marques Cordeiro-Junior; Matheus Schiavon Kronka; Lorena Athie Goulart; Nathalia Carolina Veríssimo; Lucia Helena Mascaro; Mauro Coelho dos Santos; Rodnei Bertazzoli; Marcos Roberto de Vasconcelos Lanza
Source:
Journal of catalysis 2020 v.392 pp. 56-68
ISSN:
0021-9517
Subject:
Raman spectroscopy; X-ray photoelectron spectroscopy; assays; catalysts; catalytic activity; electrochemistry; graphene; lignin; moieties; particles; physicochemical properties; scanning electron microscopy; surface area
Abstract:
... Carbon-based catalysts are widely used in oxygen reduction reactions (ORR) via 2e- for H₂O₂ electrogeneration. The direct comparability of the structural proprieties of different carbon matrices applied on ORR, however, has never been tested. Here, we evaluate how the electrochemical and structural properties of different carbon-based materials, including carbon Printex XE2B (PXE2BC), Printex L6 ( ...
DOI:
10.1016/j.jcat.2020.09.020

10. Catalytic production of γ-valerolactone from xylose over delaminated Zr-Al-SCM-1 zeolite via a cascade process

Author:
Xiangcheng Li; Xiaohong Yuan; Guopeng Xia; Jun Liang; Chuang Liu; Zhendong Wang; Weimin Yang
Source:
Journal of catalysis 2020 v.392 pp. 175-185
ISSN:
0021-9517
Subject:
Lewis acids; carbon; catalysts; catalytic activity; exhibitions; furfural; spectroscopy; surface area; xylose; zeolites
Abstract:
... A series of delaminated MWW-type Zr-Al-SCM-1 zeolites with large external surface area have been synthesized through a post-synthesized method by partial dealumination of SCM-1 and Zr incorporation based on parent SCM-1 zeolite, and used in the conversion of furfural and xylose to γ-valerolactone (GVL). The characterization of catalysts using XRD, FTIR, ²⁹Si NMR, Raman, UV–vis and XPS spectroscopy ...
DOI:
10.1016/j.jcat.2020.10.004

11. Ceria nanorod supported gold nanoparticles as structured catalysts for the oxidative steam reforming of methanol: Effect of CTAB concentration on physiochemical properties and catalyst performance

Author:
Srisin Eaimsumang; Nuwong Chollacoop; Apanee Luengnaruemitchai; Stuart H. Taylor
Source:
Journal of catalysis 2020 v.392 pp. 254-265
ISSN:
0021-9517
Subject:
catalysts; catalytic activity; cetyltrimethylammonium bromide; gold; hot water treatment; methanol; microstructure; nanogold; nanorods; oxidation; oxygen; particle size; steam; surface area; temperature; transmission electron microscopy
Abstract:
... Ceria (CeO₂) supports were synthesized by hydrothermal treatment with different Cetyltrimethylammonium bromide (CTAB) concentrations (CeO₂-X: 0.135, 0.270, 0.540 and 1.080, where X is the CTAB concentration in mmol). The micro-structures of bundle-like ceria nanorods (NR) were produced by thermal treatment of the crystalline Ce(OH)CO₃ precursor. The exposed crystal planes of (200) and (111), corre ...
DOI:
10.1016/j.jcat.2020.10.023

12. Charge-separated metal-couple-site in NiZn alloy catalysts towards furfural hydrodeoxygenation reaction

Author:
Xiaoyu Meng; Lei Wang; Lifang Chen; Ming Xu; Ning Liu; Junbo Zhang; Yusen Yang; Min Wei
Source:
Journal of catalysis 2020 v.392 pp. 69-79
ISSN:
0021-9517
Subject:
active sites; adsorption; alloys; biomass; catalysts; catalytic activity; cost effectiveness; electron transfer; furfural; hydrogenation; hydroxides; oxides; phase transition; value-added products
Abstract:
... Catalytic conversion of biomass furfural (FAL) to high value-added products (e.g., 2-methylfuran, MF) has attracted considerable attention, in which control over catalytic selectivity plays a crucial issue. Herein, a series of heterogonous NiZn alloy supported on the mixed metal oxides (MMO) were synthesized derived from layered double hydroxides (LDHs) with various Ni/Zn ratio (3/1, 1/1 or 1/3). ...
DOI:
10.1016/j.jcat.2020.10.003

13. Cu+ based active sites of different oxides supported Pd-Cu catalysts and electrolytic in-situ H2 evolution for high-efficiency nitrate reduction reaction

Author:
Chen Chen; Hongbo Zhang; Kan Li; Qingli Tang; Xingchen Bian; Jia'nan Gu; Qingwei Cao; Lijie Zhong; Christopher K. Russell; Maohong Fan; Jinping Jia
Source:
Journal of catalysis 2020 v.392 pp. 231-243
ISSN:
0021-9517
Subject:
active sites; adsorption; catalysts; catalytic activity; density; electrons; environment; hydrogen production; kinetics; nitrate reduction; oxides; oxygen; research; water
Abstract:
... Supported Pd-Cu NO₃⁻ reduction (NO₃R) under H₂ atmosphere is considered as a promising way to achieve NO₃⁻ removal directly in water through converting into N₂, which is a harmless product in environment. However, desirable NO₃R kinetics and N₂ selectivity remain challenges. In this research, 2.5 wt% Cu and 10 wt% Pd are loaded on various oxides supports and combine with electrolytic in-situ H₂ ge ...
DOI:
10.1016/j.jcat.2020.10.012

14. Dynamics of gold clusters on ceria during CO oxidation

Author:
Ming-Wen Chang; Long Zhang; Micha Davids; Ivo A.W. Filot; Emiel J.M. Hensen
Source:
Journal of catalysis 2020 v.392 pp. 39-47
ISSN:
0021-9517
Subject:
Monte Carlo method; algorithms; catalysts; catalytic activity; dynamics; evolution; gold; models; oxidation; oxygen; shape; temperature
Abstract:
... Modeling the evolution of the active phase in terms of shape and composition in supported catalysts as function of the reaction conditions is an important challenge. Herein, we employ methods rooted in genetic algorithms and grand canonical Monte-Carlo simulations to determine relevant structures of a gold clusters placed on a ceria support in oxygen atmosphere. Based on optimized structures, micr ...
DOI:
10.1016/j.jcat.2020.09.027

15. Engineering functional group decorated ZIFs to high-performance Pd@ZIF-92 nanocatalysts for C(sp2)-C(sp2) couplings in aqueous medium

Author:
Li-Xin You; Bai-Bei Zhao; Shan-Xin Yao; Gang Xiong; Ileana Dragutan; Valerian Dragutan; Fu Ding; Ya-Guang Sun
Source:
Journal of catalysis 2020 v.392 pp. 80-87
ISSN:
0021-9517
Subject:
Suzuki reaction; active sites; catalytic activity; chemoselectivity; couplings; crystal structure; ions; moieties; nanocatalysts; nanomaterials; palladium; recycling; water
Abstract:
... Herein the first ever Pd²⁺-decorated ZIF-92 nanostructure is readily accessed by post-synthesis modification (PSM) of the zeolitic imidazolate framework ZIF-90. Thus, the imidazolate linker of the ZIF-90 is functionalized with the hydroxyethylimino group, followed by anchoring the palladium catalytically active sites through a tight coordination of Pd²⁺ ions to both the N and O atoms of ZIF-92. Th ...
DOI:
10.1016/j.jcat.2020.09.024

16. Exponentially self-promoted hydrogen evolution by uni-source photo-thermal synergism in concentrating photocatalysis on co-catalyst-free P25 TiO2

Author:
Rong Ma; Jie Sun; Dong Hui Li; Jin Jia Wei
Source:
Journal of catalysis 2020 v.392 pp. 165-174
ISSN:
0021-9517
Subject:
concentrating; evolution; exhibitions; heat transfer; hydrogen; hydrogen production; irradiation; light intensity; photocatalysis; photocatalysts; photons; solar energy; solar radiation; synergism; temperature; titanium dioxide
Abstract:
... The concentrating photocatalysis (CPC) to produce hydrogen can be considered as a promising strategy for cooperative utilization of light and heat of full-spectrum solar energy. However, its fundamental mechanism remains elusive and controversial. Here, the P25 TiO₂ photocatalyst, which is optimized kinetically and thermodynamically under 36 × sun irradiation (1 × sun = 1 kW m⁻²), exhibits ultrahi ...
DOI:
10.1016/j.jcat.2020.10.007

17. Interplay between carbon dioxide enrichment and zinc oxide promotion of copper catalysts in methanol synthesis

Author:
Remco Dalebout; Nienke L. Visser; C.E. Lisette Pompe; Krijn P. de Jong; Petra E. de Jongh
Source:
Journal of catalysis 2020 v.392 pp. 150-158
ISSN:
0021-9517
Subject:
additives; carbon dioxide; carbon dioxide enrichment; catalysts; catalytic activity; copper; copper nanoparticles; design; methanol; synthesis; synthesis gas; zinc oxide
Abstract:
... Methanol synthesis over Cu/ZnO/Al₂O₃ is a key industrial reaction. Typically, a ZnOₓ promoter and CO₂ enrichment of the feed are applied to maximize the syngas conversion. However, understanding the effects of these additives on the performance of the Cu catalysts is obscured by the strong interaction between the ZnOₓ promoter and oxidic supports. Here, we use Cu nanoparticles on graphitic support ...
DOI:
10.1016/j.jcat.2020.10.006

18. Linker defect engineering for effective reactive site formation in metal–organic framework photocatalysts with a MIL-125(Ti) architecture

Author:
Yu Horiuchi; Kenta Tatewaki; Shinya Mine; Tae-Ho Kim; Soo Wohn Lee; Masaya Matsuoka
Source:
Journal of catalysis 2020 v.392 pp. 119-125
ISSN:
0021-9517
Subject:
architecture; catalytic activity; coordination polymers; engineering; evolution; heat; irradiation; light; nuclear magnetic resonance spectroscopy; photocatalysts; protons; water
Abstract:
... Introduction of linker defects in a visible light responsive metal–organic framework (MOF) photocatalyst, MIL-125(Ti)–NH₂, has been attempted to improve its reactivity. MIL-125(Ti)–NH₂, composed of Ti-oxo cluster and 2-aminoterephthalic acid organic linker, was synthesized by a solvothermal method and then underwent photothermal treatments. XRD measurements and ¹H NMR spectroscopy revealed that li ...
DOI:
10.1016/j.jcat.2020.09.017

19. Migration of cations and shell functionalization for Cu-Ce-La/SSZ-13@ZSM-5: The contribution to activity and hydrothermal stability in the selective catalytic reduction reaction

Author:
Zhiqiang Chen; Li Liu; Hongxia Qu; Baojing Zhou; Huifang Xie; Qin Zhong
Source:
Journal of catalysis 2020 v.392 pp. 217-230
ISSN:
0021-9517
Subject:
adsorption; catalysts; catalytic activity; cations; hydrophobicity; metal ions; thermogravimetry; thickness
Abstract:
... A core–shell structure Cu–Ce–La/SSZ-13@ZSM-5 catalyst with a Cu–Ce–La/SSZ-13 core and a ZSM-5 shell was first synthesized by a self-assembly method and used for ammonia-selective catalytic reduction (NH₃-SCR). In comparison with Cu–Ce–La/SSZ-13, Cu–Ce–La/SSZ-13@ZSM-5 with appropriate shell thickness presents better SCR activity and hydrothermal stability. We discovered an ion migration effect duri ...
DOI:
10.1016/j.jcat.2020.10.005

20. Nanoceria as a recyclable catalyst/support for the cyanosilylation of ketones and alcohol oxidation in cascade

Author:
Francisco Garnes-Portolés; Miguel Ángel Rivero-Crespo; Antonio Leyva-Pérez
Source:
Journal of catalysis 2020 v.392 pp. 21-28
ISSN:
0021-9517
Subject:
Lewis acids; air; alcohols; carbonyl compounds; catalysts; catalytic activity; ketones; literature; nanoceria; oxidation; solids; synthesis; temperature; yields
Abstract:
... The cyanosilylation of carbonyl compounds is a fundamental reaction in organic synthesis, to give cyanohydrins. Ketones are particularly reluctant to cyanosilane addition and require the action of a catalyst, and despite many soluble Brönsted and Lewis acids have been employed for this task, it is difficult to find in the open literature catalytic solids able to carry out the reaction. Here, we sh ...
DOI:
10.1016/j.jcat.2020.09.032