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题名: Enhanced performance of Ca-doped Pt/gamma-Al2O3 catalyst for cyclohexane dehydrogenation
作者: Yu, Jiafeng1, 3;  Ge, Qingjie1;  Fang, Wen1, 3;  Xu, Hengyong1, 2
关键词: Ca promoter ;  Hydrogen spillover ;  Pt/Al2O3 ;  Coke resistance ;  Acidity
刊名: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
发表日期: 2011-09-01
DOI: 10.1016/j.ijhydene.2011.06.066
卷: 36, 期:18, 页:11536-11544
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Electrochemistry ;  Energy & Fuels
研究领域[WOS]: Chemistry ;  Electrochemistry ;  Energy & Fuels
英文摘要: The promotion effects of Ca on catalytic performance of Ca-doped Pt/Al2O3 catalyst were investigated by varying Ca content and impregnation orders. The Ca-doped Pt/Al2O3 catalyst with atomic rate Ca/Pt = 5 exhibited the highest catalytic activity and stability. Detailed analyses show that low Ca content (Ca/Pt < 5) could not efficiently promote hydrogen spillover from Pt-Al interface to the support and reduce the strong acid sites on the support. However, high Ca content (Ca/Pt > 5) decreases the initial activity due to the coverage of Ca on the support and increases the amount of Pt strongly interacting with Ca, which inhibits Pt reduction. Furthermore, the Ca promotion effect is more pronounced when Ca is added prior to Pt due to surface modification of Ca on Al2O3 support. This modified catalyst possesses more dispersed Pt, lower acidity and larger amount of spilled-over hydrogen. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
关键词[WOS]: SPRAY-PULSED CONDITIONS ;  HETEROGENEOUS CATALYSIS ;  HYDROGEN-PRODUCTION ;  PLATINUM CATALYSTS ;  NI/AL2O3 CATALYST ;  BASIC CATALYSTS ;  OXIDE CATALYSTS ;  SPILLOVER ;  SITES ;  STORAGE
语种: 英语
WOS记录号: WOS:000294982800005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142299
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, Lab Appl Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Yu, Jiafeng,Ge, Qingjie,Fang, Wen,et al. Enhanced performance of Ca-doped Pt/gamma-Al2O3 catalyst for cyclohexane dehydrogenation[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2011,36(18):11536-11544.
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