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题名: Oxidation of platinum surfaces and reaction with carbon monoxide
作者: Li, Wei-Xue1, 2
通讯作者: 李微雪
刊名: JOURNAL OF PHYSICS-CONDENSED MATTER
发表日期: 2008-05-07
DOI: 10.1088/0953-8984/20/18/184022
卷: 20, 期:18, 页:184022-1-184022-9
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 507
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Physics, Condensed Matter
研究领域[WOS]: Physics
英文摘要: Identification of structures of active sites of catalysts under realistic conditions is key for understanding the structure-reactivity relationship and mechanism of catalytic reactions. Various in situ techniques and novel theoretical concepts (e.g. ab initio atomistic thermodynamics) have been developed. As an example, oxidation of stepped Pt(110) and Pt(332) surfaces has been studied using density functional theory, scanning tunneling microscopy and high resolution x-ray photoemission spectroscopy. It was found that ridge Pt atoms are highly reactive and one-dimensional (1D) oxide stripes form along the Pt ridge. Within the 1D oxide stripes, the reactivity is low, and reaction occurs only at the defect sites and/or boundaries of 1D PtO2 stripes. Furthermore, for stepped Pt(332) surfaces, a site highly active in promoting carbon monoxide (CO) oxidation was identified due to the formation of novel transition states at the boundary of the 1D oxide and chemisorption domains. Since the ratio of the ridge atoms increases with decrease of the particle sizes, the present study highlights the importance of the 1D oxide components for the reactivity of supported nanosize catalysts.
关键词[WOS]: DENSITY-FUNCTIONAL THEORY ;  OXYGEN-ADSORPTION ;  MOLECULAR-DYNAMICS ;  RH(110) SURFACE ;  CO OXIDATION ;  PT(111) ;  PHASE ;  OXIDE ;  RECONSTRUCTION ;  PD(111)
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000255661200024
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/100275
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, Dalian Inst Chem Phys, Ctr Theoret & Computat Chem, Dalian 116023, Peoples R China

Recommended Citation:
Li, Wei-Xue. Oxidation of platinum surfaces and reaction with carbon monoxide[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2008,20(18):184022-1-184022-9.
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