期刊
CATALYSIS LETTERS
卷 152, 期 2, 页码 372-382出版社
SPRINGER
DOI: 10.1007/s10562-021-03630-8
关键词
Au/Ni/Ni(OH)(2)/C; Catalytic hydrogenation; Au islands; Ni/Ni(OH)(2) NPs; Synergy effect
资金
- National Natural Science Foundation of China [21763011]
- Natural Science Foundation of Jiangxi Province for Distinguished Young Scholars [20192BCB23015]
- Natural Science Foundation of Jiangxi Province of China [20202BAB203005]
- Youth Jinggang Scholars Program in Jiangxi Province [[2019]57]
- China Postdoctoral Science Foundation [2018M642597]
- Foundation of State Key Laboratory of Coal Conversion [J20-21-609]
- Research Foundation of the Education Bureau of Jiangxi Province of China [GJJ190429]
- Postdoctoral Science Foundation of Jiangxi Province of China
- Program of Qingjiang Excellent Young Talents, Jiangxi University of Science and Technology [JXUSTQJBJ2019002]
- Program of Technology Innovation Talents of Ganzhou
The bimetallic nanocatalysts Au/Ni/Ni(OH)(2)/C with different Au loadings showed higher catalytic activity and selectivity compared to monometallic catalysts, with Au/Ni/Ni(OH)(2)/C-2 exhibiting the best performance.
The Au/Ni/Ni(OH)(2)/C bimetallic nanocatalysts with different Au loadings (Au/Ni/Ni(OH)(2)/C-1: 0.05 wt%Au; Au/Ni/Ni(OH)(2)/C-2: 0.46 wt%Au; Au/Ni/Ni(OH)(2)/C-3: 2.60 wt%Au) were prepared at room temperature. The characterization results proved the nanostructure of Au islands supported on the Ni/Ni(OH)(2) nanoparticles (NPs) and synergy effect of Au-, Ni- and Ni(OH)(2)-related species in Au/Ni/Ni(OH)(2)/C. These are the main reasons why their catalytic performance and selectivity to m-nitroaniline in m-dinitrobenzene hydrogenation were much higher than those of monometallic catalysts (Au/C and Ni/Ni(OH)(2)/C). Because Au/Ni/Ni(OH)(2)/C-2 was with high dispersion of Au, Au(0)/Aun+ ratio approximate to 1:1 on the surface, novel nanostructure, moderate capacity of activating and dissociating hydrogen, and synergistic effect, it had much better catalytic activity (conversion of m-dinitrobenzene-100%) and higher selectivity to m-nitroaniline (95.0%) in m-dinitrobenzene hydrogenation reaction compared to other two supported bimetallic catalysts (Au/Ni/Ni(OH)(2)/C-1 and Au/Ni/Ni(OH)(2)/C-3). Au/Ni/Ni(OH)(2)/C-2 also exhibited high stability. [GRAPHICS] .
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