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题名: In situ FTIR spectroscopic study of the CO2 methanation mechanism on Ni/Ce0.5Zr0.5O2
作者: Pan, Qiushi1, 2;  Peng, Jiaxi1;  Wang, Sheng1;  Wang, Shudong1
刊名: CATALYSIS SCIENCE & TECHNOLOGY
发表日期: 2014
DOI: 10.1039/c3cy00868a
卷: 4, 期:2, 页:502-509
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: CO2 adsorption and methanation on a Ni/Ce0.5Zr0.5O2 catalyst has been investigated using in situ FTIR spectroscopy. CO2 adsorption and methanation experiments were conducted on both components of the support and the catalyst to identify the adsorption species and any intermediate species. It was proposed that CO2 prefers to adsorb on surface oxygen sites adjacent to Ce(III) compared with those adjacent to Ce(IV)/Zr or surface hydroxyl sites. Five adsorption species were revealed for CO2 adsorption on Ni/Ce0.5Zr0.5O2 and monodentate carbonates formed on Ce(III) are easier to be hydrogenated than those on Ce(IV). Formate species were found to be the main intermediate species during the reaction and Ce(III) sites were proposed to be active sites for their hydrogenation. The adsorption and hydrogenation of formic acid were also conducted to confirm the identification of the intermediate species during the reaction. -CH2OH species were detected for the first time and found to be the further intermediates in the reaction.
关键词[WOS]: TRANSFORM INFRARED-SPECTROSCOPY ;  PALLADIUM ZIRCONIA CATALYSTS ;  WATER-GAS SHIFT ;  CARBON-DIOXIDE ;  LOW-TEMPERATURE ;  CERIUM OXIDE ;  AMORPHOUS PRECURSORS ;  ROOM-TEMPERATURE ;  FORMIC-ACID ;  SURFACE
语种: 英语
WOS记录号: WOS:000329927900027
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145865
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, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Pan, Qiushi,Peng, Jiaxi,Wang, Sheng,et al. In situ FTIR spectroscopic study of the CO2 methanation mechanism on Ni/Ce0.5Zr0.5O2[J]. CATALYSIS SCIENCE & TECHNOLOGY,2014,4(2):502-509.
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