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题名: Isolation of Pd atoms by Cu for semi-hydrogenation of acetylene: Effects of Cu loading
作者: Pei, Guangxian1, 2;  Liu, Xiaoyan1;  Chai, Mengqian1, 2;  Wang, Aiqin1;  Zhang, Tao1
关键词: Copper ;  Palladium ;  Single-atom catalyst ;  X-ray absorption spectroscopy ;  Acetylene hydrogenation ;  Excess ethylene
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2017-09-01
DOI: 10.1016/S1872-2067(17)62847-X
卷: 38, 期:9, 页:1540-1548
收录类别: SCI ;  ISTP
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Cu-alloyed Pd single-atom catalysts exhibit excellent catalytic performance for the semi-hydrogenation of acetylene; however, the limit of the Cu/Pd atomic ratio for forming the alloyed Pd single-atom catalyst is ambiguous. Herein, silica-supported Cu-Pd bimetallic catalysts with fixed Pd content and varied Cu loadings were synthesized using an incipient wetness co-impregnation method. The X-ray absorption spectroscopy results indicated that Pd formed an alloy with Cu after reduction at 250 degrees C and that the Pd atoms were completely isolated by Cu for Cu/Pd atomic ratios 40/1. Notably, increasing the reduction temperature from 250 to 400 degrees C hardly affected the catalytic performances of the Cu-Pd/SiO2 catalysts. This finding can be attributed to the similar chemical environments of Pd demonstrated by the X-ray absorption spectroscopy results. (C) 2017, Dalian Institute of Chemical Physics, Chinese Academy of Sciences.
关键词[WOS]: SINGLE-ATOM ;  SELECTIVE HYDROGENATION ;  EXCESS ETHYLENE ;  CO OXIDATION ;  CATALYSTS ;  PERFORMANCE ;  AG ;  NITROARENES ;  EFFICIENT ;  REACTOR
语种: 英语
WOS记录号: WOS:000411423600013
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/150065
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, State Key Lab Catalysis, Collaborat Innovat Ctr Chem Energy Mat iChEM, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Pei, Guangxian,Liu, Xiaoyan,Chai, Mengqian,et al. Isolation of Pd atoms by Cu for semi-hydrogenation of acetylene: Effects of Cu loading[J]. CHINESE JOURNAL OF CATALYSIS,2017,38(9):1540-1548.
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