文献类型：期刊文献

英文题名：Design of Cu-based intermetallic nanocrystals for enhancing hydrogenation selectivity

作者：Yu, Hongbo[1,2];Tang, Weiqiang[1,2];Li, Kaijie[1,2];Yin, Hongfeng[3];Zhao, Shuangliang[1,2];Zhou, Shenghu[1,2]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Key Lab Multiphase Mat Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, 1219 Zhongguan West Rd, Ningbo 315201, Zhejiang, Peoples R China

年份：2019

卷号：196

起止页码：402

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20184706116665);WOS:【SCI-EXPANDED(收录号:WOS:000456795700032)】；

基金：S. Zhou and H. Yin thank programs of Ningbo Municipal Science and Technology Innovative Research Team (Grant No. 2014B81004 and 2016B10005). This work is also supported by the National Natural Science Foundation of China (Grant No. 21776090, 21571183 and U1707602). S. Zhao acknowledges the support of Fok Ying Tong Education Foundation (151069) and W. Tang is grateful to the China Scholarship Council and British Council for the visiting fellowship.

语种：英文

外文关键词：Intermetallic compounds; Bimetallic; Selective hydrogenation; Nitroaromatics; Nanocatalysis

摘要：Motivated by the high performance of intermetallic compounds with their ordered structures, developing synthetic methods for preparing intermetallic compounds is highly desired. Herein, we report facile syntheses and rational design of the structurally ordered Cu-based intermetallic compounds (CuM (M = Pt, Pd, Au)). To achieve this, intermetallic nanoparticles were synthesized in solution by a butyllithium co-reduction method at 240 degrees C. The developed wet-chemistry syntheses of ordered intermetallic CuM nanoparticles avoided solid annealing process, and thus relatively small intermetallic nanocrystals were formed. The ordered PtCu nanocatalysts displayed enhanced chemoselectivity relative to the PtCu solid-solution alloy and individual monometallic nanocatalysts for catalytic hydrogenations of a series of substituted nitroaromatics. The DFT-based theoretical calculations for hydrogenations of halonitrobenzenes suggest that the surface geometry of ordered PtCu structures favor the hydrogenation of nitro substituent and disfavor the hydrodechlorination by-reaction, resulting in enhanced chemoselectivity. (C) 2018 Elsevier Ltd. All rights reserved.