Article
Chemistry, Multidisciplinary
Jiajuan Li, Zizhu Wang, Yirui Ma, Caiyun Xu, Shenghu Zhou
Summary: In this study, mesoporous silica SBA-16-supported NiCo bimetallic nanocatalysts were synthesized and confirmed through various characterization techniques. The synthesized NiCo/SBA-16 showed enhanced catalytic performance for the hydrogenation of nitroaromatics. The improved catalytic performance was attributed to the formation of NiCo bimetallic nanostructures, where the synergistic effect between Ni and Co enhanced their catalytic activities.
Article
Chemistry, Physical
Qianqian Zhang, Yifan Sun, Wei Li, Jinli Zhang, Yan Fu
Summary: In this study, Pd/SnO2 nanocatalysts were synthesized and used for selective hydrogenation of a, b-unsaturated aldehydes. The results showed high selectivity and faradaic efficiency, outperforming commercial Pd/C catalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Jianbo Zhao, Haifeng Yuan, Guang Yang, Yingfan Liu, Xiaomei Qin, Zheng Chen, Cheong Weng-Chon, Liming Zhou, Shaoming Fang
Summary: The Au-Pt bimetallic nanoparticles immobilized on SBA-15 were prepared with uniform size and existing in the form of alloy structure, exhibiting higher activity and selectivity compared to monometallic catalysts. The observed properties were attributed to the synergic effect between Au and Pt, enhancing abilities of hydrogen dissociation and adsorption and activation of quinoline. This precise synthetic strategy provides a new and main approach for selective hydrogenations with high performance.
Article
Chemistry, Multidisciplinary
Mingyu Duan, Daiping He, Yufang Ding, Junli Sun, Ping Jiang, Gongbing Zhou
Summary: Low loading Pt-TiO2 catalysts were prepared by an impregnation-reduction process for the chemoselective hydrogenation of CNBs to CANs. The characterization revealed that the highly dispersed Pt particles on TiO2 and the strong electronic interactions between Pt and TiO2 support led to electron deficiency of Pt and the production of suboxide TiOx species. The electron-deficient Pt and suboxide TiOx species favored the activation of the N=O bond, resulting in the unique chemoselectivity.
Article
Chemistry, Multidisciplinary
Kalim A. Sheikh, Thomas A. Zevaco, Jelena Jelic, Felix Studt, Michael Bender
Summary: Here we present a cobalt catalysed one-pot synthesis of the dimethylacetal of acetaldehyde from synthesis gas and methanol. The resulting product can be used as a fuel additive directly or after transacetalisation with long-chain alcohols. The synthesis is achieved at moderate temperatures with high selectivities and CO-conversions. Variation of the promotor metal and support material in the catalyst reveals their significant impact on catalyst activity and structure. Additionally, temperature and pressure variations provide insight into the ongoing processes.
Article
Chemistry, Multidisciplinary
Gabriel Abarca, Wellington D. G. Goncalves, Brunno L. Albuquerque, Jairton Dupont, Martin H. G. Prechtl, Jackson D. Scholten
Summary: Bimetallic RuPd nanoparticles immobilized in ionic liquids showed high catalytic activity for the selective hydrogenation of benzene and phenol, producing cyclohexane and cyclohexanol. The activity and selectivity are dependent on the ratio of Ru to Pd in the bimetallic nanoparticles.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Physical
Jeremy Audevard, Javier Navarro-Ruiz, Vincent Bernardin, Regis Philippe, Anna Corrias, Yann Tison, Alain Favre-Reguillon, Iker Del Rosal, Iann C. Gerber, Philippe Serp
Summary: Achieving high selectivity, conversion, and rate in the industrially important selective hydrogenation of a,b-unsaturated aldehydes is challenging. Previous approaches have sacrificed activity for selectivity towards unsaturated alcohol or saturated aldehyde. However, this study demonstrates that combining Ni nanoparticles (NiNP) and Ru single atoms (RuSA) on CNTs allows for improved hydrocinnamaldehyde selectivity without compromising activity. The resulting catalyst shows 94% selectivity at 99% conversion and has good stability in continuous flow conditions. Insights into the cooperative catalysis mechanism between NiNP and RuSA were obtained through density functional theory calculations.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Multidisciplinary
Krisztina Levay, Tarnas Karpati, Laszlo Hegedus
Summary: This study explored the use of various supported precious metal catalysts in the hydrogenation of nitriles to primary amines, with platinum on carbon catalyst showing superior performance compared to palladium, particularly in the synthesis of benzylamines and phenylethylamines.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Fan Xue, Qiang Li, Mingxin Lv, Yuanfei Song, Tianxing Yang, Xiaoge Wang, Tianyi Li, Yang Ren, Koji Ohara, Yufei He, Dianqing Li, Qiheng Li, Xin Chen, Kun Lin, Xianran Xing
Summary: This study reports the local structure of Pd nanocatalysts, revealing the atomic surface distribution of unique compressed strain in Pd nanocatalysts. The surface strain, induced by the shape of the catalyst, significantly weakens the adsorption energy of ethylene and avoids the over-hydrogenation of acetylene, leading to higher selectivity for ethylene.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Engineering, Environmental
Xiaonan Duan, Chenghao Zhang, Mengmeng Huang, Jisong Zhang
Summary: Solvent-free hydrogenation of chloronitrobenzene is an efficient and clean method for the production of chloroanilines, which are important intermediates in various industries. However, the side reaction of dechlorination is difficult to suppress in this process. A novel Pt/amide group grafted AC catalyst was developed by covalently grafted N-containing groups on commercial activated carbon, which successfully suppressed dechlorination. The catalyst showed excellent performance and stability in the solvent-free hydrogenation of chloronitrobenzene.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Benginur Demir, Thomas Kropp, Elise B. Gilcher, Manos Mavrikakis, James A. Dumesic
Summary: The study utilized a combination of reaction kinetics measurements, electronic structure calculations, and microkinetic modeling to investigate the effects of water on metal catalyst surfaces in the hydrogenation of oxygenates. Results showed that water enhances hydrogenation rates on oxophilic metal catalysts like Ru/C, but not on Pt-based catalysts. Microkinetic modeling predicted the favored reaction pathway and species coverage on Ru surfaces, aiding in understanding the mechanistic role of water in the metal catalyzed reactions for producing chemical building blocks from biomass-derived oxygenates.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Chengshan Dai, Ying Zhang, Junnan Chen, Xia Zhong, Liyun Zhang, Bingsen Zhang
Summary: This study investigates the effect of support morphology on the catalytic performance of selective hydrogenation reactions. The results show that the properties of metal nanoparticles can be modified by the nature of the support, leading to improved catalytic activity and stability.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Review
Chemistry, Multidisciplinary
Kunlong Liu, Ruixuan Qin, Nanfeng Zheng
Summary: This review summarizes recent research advances in deciphering complex interfacial effects of heterogeneous metal nanocatalysts, focusing on the design of practical heterogeneous catalysts with clear catalytic mechanism and nearly perfect selectivity.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Applied
Shujing Zhang, Hong Ma, Yuxia Sun, Xin Liu, Meiyun Zhang, Yang Luo, Jin Gao, Jie Xu
Summary: The tandem catalysis of hydrogenation rearrangement of furfural to produce cyclopentanone using Cu-Ni/Al-MCM-41 catalyst exhibited high conversion and selectivity under near-neutral conditions. The presence of a small amount of dispersed Al in MCM-41 facilitated the formation of highly dispersed CuNi bimetallic nanoparticles, leading to significantly improved catalytic performance attributed to bimetallic synergistic and charge transfer effects.
CHINESE JOURNAL OF CATALYSIS
(2021)
Article
Multidisciplinary Sciences
Wei Long, Shousheng Huang, Yinfei Huang
Summary: The conversion of furfural to cyclopentanone over Ru-Co bimetallic catalysts was studied, and it was found that high selectivity to cyclopentanone could be achieved under 3.0 MPa and 433 K. Addition of cerium oxide greatly improved the catalytic performance. The catalysts were characterized by various techniques and showed high stability in 5 wt% furfural solution.