Oxygen reduction reaction properties for dry-process synthesized Pt/TaCj nanoparticles

R. Myochi, T. Nagao, Y. Fugane, S. Takahashi, N. Todoroki, T. Wadayama

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

2 Citations (Scopus)

Abstract

Oxygen reduction reaction (ORR) activity and electrochemical structural stability of Pt/Ta-carbide nanoparticles (Pt/TaCx NPs) were investigated. The Pt/TaCx NPs were fabricated via arc plasma deposition (APD) of Ta under CH4 partial pressure (0.05 Pa) onto a highly oriented pyrolytic graphite (HOPG) substrate, followed by electron-beam deposition of Pt in ultra-high vacuum (UHV;-10"' Pa). X-ray diffraction patterns of the APD-TaCx samples showed that the diffraction peak due to TaC (rock-salt structure), exhibiting tantalum carbide which can be synthesized through the APD of Ta in CH4 atmosphere. The ORR activity of pristine Pt/TaCx samples is higher than that of the Pt/Ta alloy NPs prepared in UHV. Furthermore, the accelerated durability test results showed that the carbonization of Ta improves the ORR durability. The results clearly reveal that early transition metal carbides, e.g., TaC, are effective as core materials of core-shell-type Pt-based ORR catalysts.

Original languageEnglish
Title of host publicationECS Transactions
EditorsD.J. Jones, H. Gasteiger, H. Uchida, T.J. Schmidt, F. Buechi, K.E. Swider-Lyons, B.S. Pivovar, P.N. Pintauro, V.K. Ramani, J.M. Fenton, P. Strasser, K.E. Ayers, A.Z. Weber, T.F. Fuller, R.A. Mantz, H. Xu, C. Coutanceau, S. Mitsushima, S. Narayan, P. Shirvanian, Y.-T. Kim, Y. Gochi-Ponce
PublisherElectrochemical Society Inc.
Pages519-524
Number of pages6
Edition13
ISBN (Print)9781510871731
DOIs
Publication statusPublished - 2018
EventSymposium on Polymer Electrolyte Fuel Cells and Electrolyzers 18, PEFC and E 2018 - AiMES 2018, ECS and SMEQ Joint International Meeting - Cancun, Mexico
Duration: 2018 Sep 302018 Oct 4

Publication series

NameECS Transactions
Number13
Volume86
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Other

OtherSymposium on Polymer Electrolyte Fuel Cells and Electrolyzers 18, PEFC and E 2018 - AiMES 2018, ECS and SMEQ Joint International Meeting
Country/TerritoryMexico
CityCancun
Period18/9/3018/10/4

ASJC Scopus subject areas

  • Engineering(all)

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