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Phys Chem Chem Phys. 2014 Jul 21;16(27):13748-54. doi: 10.1039/c4cp00265b. Epub 2014 Apr 30.

In situ back-side illumination fluorescence XAFS (BI-FXAFS) studies on platinum nanoparticles deposited on a HOPG surface as a model fuel cell: a new approach to the Pt-HOPG electrode/electrolyte interface.

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  • 1Catalysis Research Center, Hokkaido University, Sapporo, Hokkaido 001-0021, Japan. askr@cat.hokudai.ac.jp.

Abstract

We measured the in situ polarization-dependent X-ray absorption fine structure of platinum nanoparticles (PtNPs) deposited on a flat highly oriented pyrolytic graphite (HOPG) substrate under electrochemical conditions using a back-side illumination method. In this method, the thin HOPG substrate with PtNPs deposited on one side was used as a window for incident and fluorescent X-rays, as well as an electrode. A bent crystal Laue analyzer (BCLA) was applied to the extraction of the Pt Lα fluorescent X-ray signals from strong scattered X-rays. Pt L3 edge XAFS spectra were observed for various electrode potentials and polarization directions.

PMID:
24788597
[PubMed - in process]
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