Oxidation-reduction potential control for one step synthesis of Cu-Pt core-shell nanoparticles

T. Nakamoto, Y. Terui, S. Tsuchida, R. Seki, Y. Ueyama, S. Yokoyama, H. Takahashi, K. Tohji

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

Abstract

Cu-Pt core-shell nanoparticles (NPs) are prospective to reduce the amount of Pt loading in polymer electrolyte fuel cells (PEFCs). In order to synthesize Cu-Pt core-shell NPs, it is necessary to separate reduction processes of Cu and Pt each other or inverse the oxidation-reduction potentials (ORPs) of them. Here, we demonstrate two steps synthesis by galvanic displacement and one step synthesis by ORP control. In the two steps process, Pt hollow NPs were obtained because the inner Cu was not perfectly covered by Pt and leached out. ORP calculation technique was developed, and Cu-Pt core-shell NPs were synthesized with alloy NPs via one step process. The Cu-Pt core-shell NPs showed much higher specific activity than commercial Pt catalyst.

Original languageEnglish
Title of host publicationECS Transactions
PublisherIOP Publishing Ltd.
Pages1517-1524
Number of pages8
Edition13
ISBN (Electronic)9781510866171, 9781510866171, 9781510866171, 9781607688280, 9781607688303, 9781607688310, 9781607688327, 9781607688334, 9781607688341, 9781607688358, 9781607688365, 9781607688372, 9781607688389, 9781607688396, 9781607688402, 9781607688419
DOIs
Publication statusPublished - 2018
Event233rd Meeting of the Electrochemical Society - Seattle, United States
Duration: 2018 May 132018 May 17

Publication series

NameECS Transactions
Number13
Volume85
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Conference

Conference233rd Meeting of the Electrochemical Society
Country/TerritoryUnited States
CitySeattle
Period18/5/1318/5/17

ASJC Scopus subject areas

  • Engineering(all)

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