文献类型：期刊文献

英文题名：Selective hydrogenation of phenylacetylene over bimetallic Pd-Cu/Al2O3 and Pd-Zn/Al2O3 catalysts

作者：Wang, Zhanqi[1];Yang, Lei[1];Zhang, Rui[2];Li, Li[3];Cheng, Zhenmin[1];Zhou, Zhiming[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Engn Res Ctr Large Scale Reactor Engn & Technol, Minist Educ, Shanghai 200237, Peoples R China;[3]E China Univ Sci & Technol, Chem Engn Res Ctr, Shanghai 200237, Peoples R China

年份：2016

卷号：264

起止页码：37

外文期刊名：CATALYSIS TODAY

收录：;EI(收录号：20153701254085);WOS:【SCI-EXPANDED(收录号:WOS:000369810800006)】；

基金：Financial supports from the National Natural Science Foundation of China (21276076), the Program for New Century Excellent Talents in University (NCET-13-0801), the Fundamental Research Funds for the Central Universities (222201313011) and the "111" project (B08021) are gratefully acknowledged.

语种：英文

外文关键词：Selective hydrogenation; Phenylacetylene; Pd-Cu/Al2O3; Pd-Zn/Al2O3; Activity; Selectivity

摘要：Bimetallic Pd-Cu/Al2O3 and Pd-Zn/Al2O3 catalysts with various Cu/Pd and Zn/Pd molar ratios were prepared and applied to the selective hydrogenation of phenylacetylene to styrene. The structure properties of the bimetallic catalysts were characterized by inductively coupled plasma-optical emission spectroscopy (ICP-OES), CO chemisorption, high-resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS). Different from Pd-Cu/Al2O3 where the interaction between Pd and Cu only generated the geometric effect, both geometric and electronic effects were observed for Pd-Zn/Al2O3. The activity and selectivity of the bimetallic catalysts can be tuned by varying the Cu/Pd and Zn/Pd molar ratios, which were essentially determined by the geometric and electronic effects of the catalysts. Although both Pd-Cu/Al2O3 and Pd-Zn/Al2O3 exhibited improved selectivity to styrene compared to monometallic Pd/Al2O3, there is a difference in the activity and selectivity between the two types of bimetallic catalysts at the same Cu/Pd and Zn/Pd molar ratio, which is mainly caused by the different modification degrees of Cu and Zn on Pd. Among all the catalysts prepared in this work, the Pd-Zn/Al2O3 with a Zn/Pd molar ratio of 6 displayed the best selectivity to styrene, being 86.3% at 99.5% phenylacetylene conversion. (C) 2015 Elsevier B.V. All rights reserved.