Local atomic order in low Pt-content nanocatalysts investigated in situ by XAS

Emiliano Principi; Agnieszka Witkowska; Cicco Andrea Di

doi:10.1088/1742-6596/190/1/012173

Local atomic order in low Pt-content nanocatalysts investigated in situ by XAS

Abstract

The unique features of X-ray absorption spectroscopy allow investigations of nanosized catalysts for fuel cells under working conditions. We present the results of an experiment carried out on a low Pt content electrocatalyst supported by a mesoporous heteropolyacid salt and used at the cathode of a proton exchange membrane fuel cell (PEMFC). The analysis of the EXAFS signal at the Pt L3-edge indicates that upon operating the fuel cell a substantial oxygen desorption from the Pt catalytic surface occurs followed by a tangible structural change on the Pt local order.

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Category:: Conference activity
Type:: publikacja w wydawnictwie zbiorowym recenzowanym (także w materiałach konferencyjnych)
Title of issue:: The 14th International Conference on X-ray Absorption Fine Structure(XAFS'14), Journal of Physics: Conference Series.
Language:: English
Publication year:: 2009
Bibliographic description:: Principi E., Witkowska A., Di C.: Local atomic order in low Pt-content nanocatalysts investigated in situ by XAS// The 14th International Conference on X-ray Absorption Fine Structure(XAFS'14), Journal of Physics: Conference Series./ ed. eds. A Di Cicco , A Filipponi. USA: IOP Publishing, 2009,
DOI:: Digital Object Identifier (open in new tab) 10.1088/1742-6596/190/1/012173
Verified by:: Gdańsk University of Technology