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学科主题: 物理化学
题名: Synergetic Effect of Surface and Subsurface Ni Species at Pt-Ni Bimetallic Catalysts for CO Oxidation
作者: Mu, Rentao1;  Fu, Qiang1;  Xu, Hong1;  Zhang, Hui1;  Huang, Yuying2;  Jiang, Zheng2;  Zhang, Shuo2;  Tan, Dali1;  Bao, Xinhe1
通讯作者: 傅强 ;  包信和
刊名: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
发表日期: 2011-02-16
DOI: 10.1021/ja109483a
卷: 133, 期:6, 页:1978-1986
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 502
产权排名: 1,1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
摘要: Synergetic effect of surface and subsurface Ni species at Pt-Ni bimetallic catalysts for CO oxidation
研究领域[WOS]: Chemistry
英文摘要: Various well-defined Ni-Pt(111) model catalysts are constructed at atomic-level precision under ultra-high-vacuum conditions and characterized by X-ray photoelectron spectroscopy and scanning tunneling microscopy. Subsequent studies of CO oxidation over the surfaces show that a sandwich surface (NiO(1-x)/Pt/Ni/Pt(111)) consisting of both surface Ni oxide nanoislands and subsurface Ni atoms at a Pt(111) surface presents the highest reactivity. A similar sandwich structure has been obtained in supported Pt-Ni nanoparticles via activation in H(2) at an intermediate temperature and established by techniques including acid leaching, inductively coupled plasma, and X-ray adsorption near-edge structure. Among the supported Pt-Ni catalysts studied, the sandwich bimetallic catalysts demonstrate the highest activity to CO oxidation, where 100% CO conversion occurs near room temperature. Both surface science studies of model catalysts and catalytic reaction experiments on supported catalysts illustrate the synergetic effect of the surface and subsurface Ni species on the CO oxidation, in which the surface Ni oxide nanoislands activate O(2), producing atomic O species, while the subsurface Ni atoms further enhance the elementary reaction of CO oxidation with O.
关键词[WOS]: OXYGEN REDUCTION REACTION ;  FUEL-CELL ELECTROCATALYSTS ;  TRANSITION-METAL SURFACES ;  DENSITY-FUNCTIONAL THEORY ;  ALPHA,BETA-UNSATURATED ALDEHYDES ;  CHEMICAL-PROPERTIES ;  PREFERENTIAL OXIDATION ;  UNSATURATED ALDEHYDES ;  SN-PT/SIO2 CATALYSTS ;  ELECTRONIC-STRUCTURE
语种: 英语
WOS记录号: WOS:000287831800070
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/115482
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, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China

Recommended Citation:
Mu, Rentao,Fu, Qiang,Xu, Hong,et al. Synergetic Effect of Surface and Subsurface Ni Species at Pt-Ni Bimetallic Catalysts for CO Oxidation[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2011,133(6):1978-1986.
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