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Issue 21, 2010
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Electronic structure of alumina-supported monometallic Pt and bimetallic PtSn catalysts under hydrogen and carbon monoxide environment

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Abstract

The structure of supported platinum and platinumtin nanoparticles was investigated by Pt L3 high-energy resolution fluorescence detected X-ray absorption spectroscopy (HERFD XAS) and resonant inelastic X-ray scattering (RIXS). The incorporation of tin decreased the ability of particles to adsorb both hydrogen and carbon monoxide due to tin enrichment on the surface. The platinum d band of platinumtin particles was narrower and was shifted down relative to the Fermi level in comparison to platinum particles. The difference in electronic structure between pure and alloyed particles persisted after adsorption of hydrogen. The Pt–H antibonding state was clearly identified for the pure platinum particles. The strong adsorption of carbon monoxide changed the geometric structure of the PtSn particles. After carbon monoxide adsorption, the geometric structures of both systems were very similar. Room temperature adsorption of carbon monoxide affects the structure of platinum catalysts.

Graphical abstract: Electronic structure of alumina-supported monometallic Pt and bimetallic PtSn catalysts under hydrogen and carbon monoxide environment

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Publication details

The article was received on 07 Jan 2010, accepted on 21 Apr 2010 and first published on 29 Apr 2010


Article type: Paper
DOI: 10.1039/C000403K
Citation: Phys. Chem. Chem. Phys., 2010,12, 5668-5677
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    Electronic structure of alumina-supported monometallic Pt and bimetallic PtSn catalysts under hydrogen and carbon monoxide environment

    J. Singh, R. C. Nelson, B. C. Vicente, S. L. Scott and J. A. van Bokhoven, Phys. Chem. Chem. Phys., 2010, 12, 5668
    DOI: 10.1039/C000403K

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