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题名: Graphene cover-promoted metal-catalyzed reactions
作者: Yao, Yunxi1, 2;  Fu, Qiang1;  Zhang, Y. Y.3;  Weng, Xuefei4;  Li, Huan4;  Chen, Mingshu4;  Jin, Li1;  Dong, Aiyi1;  Mu, Rentao1;  Jiang, Peng1;  Liu, Li2, 5;  Bluhm, Hendrik6;  Liu, Zhi7;  Zhang, S. B.3;  Bao, Xinhe1
关键词: graphene ;  interface catalysis ;  confinement effect ;  CO oxidation ;  platinum
刊名: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
发表日期: 2014-12-02
DOI: 10.1073/pnas.1416368111
卷: 111, 期:48, 页:17023-17028
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Multidisciplinary Sciences
研究领域[WOS]: Science & Technology - Other Topics
英文摘要: Graphitic overlayers on metals have commonly been considered as inhibitors for surface reactions due to their chemical inertness and physical blockage of surface active sites. In this work, however, we find that surface reactions, for instance, CO adsorption/desorption and CO oxidation, can take place on Pt(111) surface covered by monolayer graphene sheets. Surface science measurements combined with density functional calculations show that the graphene overlayer weakens the strong interaction between CO and Pt and, consequently, facilitates the CO oxidation with lower apparent activation energy. These results suggest that interfaces between graphitic overlayers and metal surfaces act as 2D confined nano-reactors, in which catalytic reactions are promoted. The finding contrasts with the conventional knowledge that graphitic carbon poisons a catalyst surface but opens up an avenue to enhance catalytic performance through coating of metal catalysts with controlled graphitic covers.
关键词[WOS]: CHEMICAL-VAPOR-DEPOSITION ;  DENSITY-FUNCTIONAL THEORY ;  CO OXIDATION ;  PHOTOELECTRON-SPECTROSCOPY ;  EPITAXIAL GRAPHENE ;  SURFACE SCIENCE ;  PT(111) ;  PLATINUM ;  CARBON ;  ADSORPTION
语种: 英语
WOS记录号: WOS:000345920800024
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145790
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.Texas A&M Univ, Dept Chem, College Stn, TX 77843 USA
3.Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, Troy, NY 12180 USA
4.Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Fujian, Peoples R China
5.Texas A&M Univ, Dept Mat Sci & Engn, College Stn, TX 77843 USA
6.Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA
7.Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

Recommended Citation:
Yao, Yunxi,Fu, Qiang,Zhang, Y. Y.,et al. Graphene cover-promoted metal-catalyzed reactions[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2014,111(48):17023-17028.
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