Oxygen reduction reaction properties of dry-process-synthesized Pt/graphene/SiC(0001) model catalyst surfaces

M. Watanabe, J. Moon, T. Tanabe, N. Todoroki, T. Wadayama

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

Abstract

We investigated the electrochemical properties of Pt/graphene/SiC(0001) model nanostructures prepared by thermal annealing of the SiC(0001) substrates at 1300-1600 °C in vacuum, followed by the vacuum deposition of Pt. Thermal annealing of the Si-terminated 4H-and 6H-SiC(0001) substrate surfaces generated graphene layers as a result of the sublimation of Si atoms of the substrates: the thickness of the graphene layer depended on the annealing temperatures. For example, annealing of the 4H-and 6H-SiC(0001) substrates at 1600°C generated fewer than ca. 20 monolayers and ca. 40 monolayers of graphene, respectively, as judged by cross-sectional scanning transmission electron microscopy (STEM) images. Then, Pt was deposited on the prepared graphene/SiC(0001) surfaces at room temperature by electron-beam deposition in ultra-high vacuum (~10' Pa). The electrochemical properties of the prepared nanostructures are discussed on the basis of the cyclic voltammetry and linear sweep voltammetry results.

Original languageEnglish
Title of host publicationECS Transactions
EditorsC. Coutanceau, S. Narayan, Y.-T. Kim, Y. Gochi-Ponce, B.S. Pivovar, T.F. Fuller, R.A. Mantz, P. Shirvanian, D.J. Jones, F. Buechi, V.K. Ramani, J.M. Fenton, K.E. Swider-Lyons, T.J. Schmidt, K.E. Ayers, A.Z. Weber, P.N. Pintauro, P. Strasser, H. Xu, S. Mitsushima, H. Gasteiger, H. Uchida
PublisherElectrochemical Society Inc.
Pages525-530
Number of pages6
Edition13
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - 2018
Externally publishedYes
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

Conference

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

ASJC Scopus subject areas

  • Engineering(all)

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