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题名: Synthesis of Pt-Cu/SiO2 catalysts with different structures and their application in hydrodechlorination of 1,2-dichloroethane
作者: Wei, Xing1, 2;  Wang, Ai-Qin1;  Yang, Xiao-Feng1;  Li, Lin1;  Zhang, Tao1
关键词: Platinum ;  Copper ;  Hydrodechlorination ;  Bimetallic ;  Dichloroethane
刊名: APPLIED CATALYSIS B-ENVIRONMENTAL
发表日期: 2012-06-13
DOI: 10.1016/j.apcatb.2012.03.020
卷: 121, 页:105-114
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Engineering, Environmental ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Pt-Cu/SiO2 catalysts with different structures and chemical compositions were prepared using a two-step method. For the series of PtxCu100-x/SiO2 catalysts, Pt was deposited in the first step with H-2 PtCl6 as the precursor and Cu was deposited subsequently with Cu(NH3)(4)(2+) as the precursor. For the Cu100-xPtx/SiO2 catalyst, the deposition sequence was reversed accompanied with galvanic displacement of Cu-0 by Pt4+. All the samples were characterized by XRD, TEM, H-2-TPR, H-2 chemisorption. and DRIFT of CO adsorption, and evaluated for the catalytic hydrodechlorination of 1,2-dichloroethane. The results show that the PtxCu100-x/SiO2 catalysts exhibit core-shell structures with Pt-rich alloy cores and Cu-rich alloy shells, while the Cu100-xPtx/SiO2 catalyst shows a Pt-Cu alloy core and a Pt rich alloy shell. Different structures and chemical compositions lead to quite different performances in catalyzing the hydrodechlorination of 1,2-dichloroethane. The Pt16Cu84/SiO2 catalyst gave a high selectivity to ethylene over 90% and an excellent stability over 18 h run due to the Cu-rich shell structure, while the Cu44Pt56/SiO2 catalyst produced predominantly ethane due to the Pt rich shell. (c) 2012 Elsevier B.V. All rights reserved.
关键词[WOS]: COGELLED XEROGEL CATALYSTS ;  SOL-GEL CATALYSTS ;  SUPPORTED PD-CU ;  ALLOY NANOPARTICLES ;  SELECTIVE HYDRODECHLORINATION ;  CO OXIDATION ;  BIMETALLIC CATALYSTS ;  PT-CU/C ;  DECHLORINATION ;  PALLADIUM
语种: 英语
WOS记录号: WOS:000305502200012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138019
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, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Wei, Xing,Wang, Ai-Qin,Yang, Xiao-Feng,et al. Synthesis of Pt-Cu/SiO2 catalysts with different structures and their application in hydrodechlorination of 1,2-dichloroethane[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2012,121:105-114.
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