Electrochemical structural stability of au-modified Pt nanoparticles prepared by arc-plasma deposition

Shuntaro Takahashi, Hiroshi Chiba, Naoto Todoroki, Toshimasa Wadayama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

The electrochemical structural stability of Au-modified Pt nanoparticles (Aux/Pt100 NPs, where x is the atomic ratio of Au) was investigated. Aux/Pt100 samples were fabricated on a highly oriented pyrolytic graphite substrate at 773 K through sequential arc plasma depositions of Pt followed by Au. In cyclic voltammograms of Aux/Pt100, characteristic currents correlated to the corner and edge sites of the Pt NPs (0.13 V vs. RHE) decreased with increasing x. Electrochemical surface area decay, observed after applying potential cycling between 0.6 and 1.0 V, clearly show that surface modification of the Pt NPs with appropriate amounts of Au atoms located at the corner and edge sites improved the structural stability of the Pt NPs.

Original languageEnglish
Title of host publicationPolymer Electrolyte Fuel Cells 15, PEFC 15
EditorsH. A. Gasteiger, V. K. Ramani, J. M. Fenton, T. J. Schmidt, D. J. Jones, K. E. Ayers, K. A. Perry, T. F. Fuller, B. S. Pivovar, K. Shinohara, F. N. Buchi, R. A. Mantz, C. Coutanceau, P. Strasser, A. Z. Weber, K. Swider-Lyons, H. Uchida, M. Edmundson, S. Mitsushima, S. R. Narayanan
PublisherElectrochemical Society Inc.
Pages657-661
Number of pages5
Edition17
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - 2015
EventSymposium on Polymer Electrolyte Fuel Cells 15, PEFC 2015 - 228th ECS Meeting - Phoenix, United States
Duration: 2015 Oct 112015 Oct 15

Publication series

NameECS Transactions
Number17
Volume69
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

OtherSymposium on Polymer Electrolyte Fuel Cells 15, PEFC 2015 - 228th ECS Meeting
CountryUnited States
CityPhoenix
Period15/10/1115/10/15

ASJC Scopus subject areas

  • Engineering(all)

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