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Issue 4, 2012
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Highly active Pt–Fe bicomponent catalysts for CO oxidation in the presence and absence of H2

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Abstract

Surface Fe ensembles, surface alloyed Fe atoms, and subsurface Fe species have been identified at Pt surfaces on the basis of studies in Fe–Pt(111) model systems and supported Pt–Fe nanoparticles (NPs). The surface Fe ensemble changes to ferrous oxide and forms a highly active and stable “FeO-on-Pt” structure in preferential oxidation of CO in the presence of H2 (PROX), which, however, gets fully oxidized in CO oxidation in the absence of H2 (COOX) and becomes inactive in the reaction. The surface alloyed Fe remains stable under the H2-rich and O2-rich reaction conditions, which are active for both PROX and COOX reactions. Accordingly, highly efficient Pt–Fe catalysts for the PROX and COOX reactions can be prepared via mild reduction and/or acid leaching.

Graphical abstract: Highly active Pt–Fe bicomponent catalysts for CO oxidation in the presence and absence of H2

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Publication details

The article was received on 17 Aug 2011, accepted on 29 Sep 2011 and first published on 04 Nov 2011


Article type: Paper
DOI: 10.1039/C1EE02393D
Citation: Energy Environ. Sci., 2012,5, 6313-6320

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    Highly active Pt–Fe bicomponent catalysts for CO oxidation in the presence and absence of H2

    H. Xu, Q. Fu, Y. Yao and X. Bao, Energy Environ. Sci., 2012, 5, 6313
    DOI: 10.1039/C1EE02393D

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