期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 5, 页码 1209-1213出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201709784
关键词
ab initio calculations; alloys; reaction mechanisms; supported catalysts; ultrathin oxide films
资金
- U.S. Department of Energy, BES-Materials Science and Engineering [DE-AC-02-06CH11357]
- UChicago Argonne, LLC
- US Department of Energy, Scientific User Facilities [DE-AC-02-06CH11357]
- UChicago Argonne LLC
- JSPS [15K04594]
- ERC-AG SEPON project
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- European Social Fund (ESF)
- federal state Mecklenburg-Vorpommern within the project Nano4Hydrogen
- Federal Ministry of Education and Research (BMBF) within the project Light2Hydrogen
- Deutsche Forschungsgemeinschaft (DFG) [SFB652]
- Grants-in-Aid for Scientific Research [15K04594] Funding Source: KAKEN
A combined experimental and theoretical investigation of Ag-Pt sub-nanometer clusters as heterogeneous catalysts in the CO -> CO2 reaction (COox) is presented. Ag9Pt2 and Ag9Pt3 clusters are size-selected in the gas phase, deposited on an ultrathin amorphous alumina support, and tested as catalysts experimentally under realistic conditions and by first-principles simulations at realistic coverage. Insitu GISAXS/TPRx demonstrates that the clusters do not sinter or deactivate even after prolonged exposure to reactants at high temperature, and present comparable, extremely high COox catalytic efficiency. Such high activity and stability are ascribed to a synergic role of Ag and Pt in ultranano-aggregates, in which Pt anchors the clusters to the support and binds and activates two CO molecules, while Ag binds and activates O-2, and Ag/Pt surface proximity disfavors poisoning by CO or oxidized species.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据