Efficient and recyclable bimetallic Co−Cu catalysts for selective hydrogenation of halogenated nitroarenes

2021 ◽  
pp. 163143
Author(s):  
Yao Sheng ◽  
Baoqin Wu ◽  
Jiaan Ren ◽  
Xueguang Wang ◽  
Xiujing Zou ◽  
...  
Keyword(s):  
Selective Hydrogenation ◽  
Cu Catalysts

Cost-effective promoter-doped Cu-based bimetallic catalysts for the selective hydrogenation of C2H2 to C2H4: the effect of the promoter on selectivity and activity

2018 ◽  
Vol 20 (25) ◽  
pp. 17487-17496 ◽  
Author(s):  
Riguang Zhang ◽  
Bo Zhao ◽  
Leilei He ◽  
Anjie Wang ◽  
Baojun Wang
Keyword(s):  
Density Functional Theory ◽  
Selective Hydrogenation ◽  
Bimetallic Catalysts ◽  
Density Functional ◽  
Density Functional Theory Calculations ◽  
Cost Effective ◽  
Microkinetic Modeling ◽  
Functional Theory ◽  
Cu Catalysts

Different metal promoter M-modified Cu catalysts have been employed to fully investigate the selective hydrogenation of C2H2 using density functional theory calculations together with microkinetic modeling.

Deficient copper decorated platinum nanoparticles for selective hydrogenation of chloronitrobenzene

2017 ◽  
Vol 5 (22) ◽  
pp. 11294-11300 ◽  
Author(s):  
Xin Li ◽  
Yue Wang ◽  
Liqun Li ◽  
Wenqing Huang ◽  
Zicheng Xiao ◽  
...  
Keyword(s):  
Selective Hydrogenation ◽  
Platinum Nanoparticles ◽  
Electronic Effect ◽  
Catalytic Performance ◽  
Geometric Effect ◽  
Cu Catalysts

Two model Pt–Cu catalysts are designed to explore the contribution of electronic effect and geometric effect on their catalytic performance.

scholarly journals Highly Enhanced Catalytic Stability of Copper by the Synergistic Effect of Porous Hierarchy and Alloying for Selective Hydrogenation Reaction

Catalysts ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 12
Author(s):  
Hao Yuan ◽  
Zhao Wang ◽  
Shunjing Jin ◽  
Shanshan Xiao ◽  
Siming Liu ◽  
...  
Keyword(s):  
Selective Hydrogenation ◽  
Porous Alumina ◽  
Hydrogenation Reaction ◽  
Copper Surface ◽  
Hierarchically Porous ◽  
In Situ Activation ◽  
Hydrogenation Reactions ◽  
Hydrolysis Of Metal Alkoxides ◽  
Catalytic Stability ◽  
Cu Catalysts

Supported copper has a great potential for replacing the commercial palladium-based catalysts in the field of selective alkynes/alkadienes hydrogenation due to its excellent alkene selectivity and relatively high activity. However, fatally, it has a low catalytic stability owing to the rapid oligomerization of alkenes on the copper surface. In this study, 2.5 wt% Cu catalysts with various Cu:Zn ratios and supported on hierarchically porous alumina (HA) were designed and synthesized by deposition–precipitation with urea. Macropores (with diameters of 1 μm) and mesopores (with diameters of 3.5 nm) were introduced by the hydrolysis of metal alkoxides. After in situ activation at 350 °C, the catalytic stability of Cu was highly enhanced, with a limited effect on the catalytic activity and alkene selectivity. The time needed for losing 10% butadiene conversion for Cu1Zn3/HA was ~40 h, which is 20 times higher than that found for Cu/HA (~2 h), and 160 times higher than that found for Cu/bulky alumina (0.25 h). It was found that this type of enhancement in catalytic stability was mainly due to the rapid mass transportation in hierarchically porous structure (i.e., four times higher than that in bulky commercial alumina) and the well-dispersed copper active site modified by Zn, with identification by STEM–HAADF coupled with EDX. This study offers a universal way to optimize the catalytic stability of selective hydrogenation reactions.

Selective hydrogenation of carvone and o-xylene on Pd–Cu catalysts prepared by surface redox reaction

2000 ◽  
Vol 157 (1-2) ◽  
pp. 143-149 ◽  
Author(s):  
R. Mélendrez ◽  
G. Del Angel ◽  
V. Bertin ◽  
M.A. Valenzuela ◽  
J. Barbier
Keyword(s):  
Selective Hydrogenation ◽  
Redox Reaction ◽  
Cu Catalysts ◽  
Surface Redox ◽  
Surface Redox Reaction

Preparation and investigation of Pd doped Cu catalysts for selective hydrogenation of acetylene

2019 ◽  
Vol 14 (4) ◽  
pp. 522-533 ◽  
Author(s):  
Xinxiang Cao ◽  
Tengteng Lyu ◽  
Wentao Xie ◽  
Arash Mirjalili ◽  
Adelaide Bradicich ◽  
...  
Keyword(s):  
Selective Hydrogenation ◽  
Selective Hydrogenation Of Acetylene ◽  
Cu Catalysts

Ortho-chloronitrobenzene hydrogenation over carbon supported Rh-Cu catalysts

2017 ◽  
Vol 3 (1) ◽  
Author(s):  
Ajit Das ◽  
Nagendranath Mahata
Keyword(s):  
Selective Hydrogenation ◽  
Carbon Support ◽  
Catalytic Performance ◽  
Excellent Performance ◽  
H2 Chemisorption ◽  
Promotional Effect ◽  
Cu Catalysts ◽  
Excellent Selectivity

The promotional effect of Cu on the catalytic performance of supported Rh catalysts in the selective hydrogenation of ortho-chloronitrobenzene to ortho-chloroaniline was studied using carbon support. The catalysts were characterised by BET, H2 chemisorption, TEM. Rh surface is partially covered by Cu as a result of interaction between Rh and Cu. The superficial Cu species activate the N=O bond of chloronitrobenzene. Thus, the bimetallic RhCu catalysts exhibited excellent performance, producing chloroaniline with excellent selectivity.

Sonochemical synthesis of Zn-promoted porous MgO-supported lamellar Cu catalysts for selective hydrogenation of dimethyl oxalate to ethanol and their long-term stability

2018 ◽  
Vol 42 (21) ◽  
pp. 17553-17562 ◽  
Author(s):  
Mohamed Abbas ◽  
Juan Zhang ◽  
Zheng Chen ◽  
Jiangang Chen
Keyword(s):  
Selective Hydrogenation ◽  
Hydrogenation Reaction ◽  
Environmentally Benign ◽  
Sonochemical Synthesis ◽  
Dimethyl Oxalate ◽  
Term Stability ◽  
Long Term Stability ◽  
Cu Catalysts

Zn-doped lamellar Cu nanocrystals supported on MgO NPs catalyst was developed and employed as novel and robust catalyst for the production of Ethanol from the environmentally benign hydrogenation reaction of dimethyl oxalate.

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