Electrochemical properties for UHV-prepared Pt/M well-defined single crystal surfaces

N. Todoroki, Y. Iijima, Y. Takahashi, T. Kondo, Y. Asakimori, Y. Bando, T. Wadayama

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

We investigated the electrochemical properties of various-monolayer (ML)-thick Pt-shell model surfaces. The m-ML-Pt shell/Au(111) (m = 1-3) was prepared through epitaxial growth of Pt on a clean Au(111) surface at 300 K, and the n-ML-Pt shell/Ni-Pt(111) (n = 1-4) was generated through thermal segregation of substrate Pt atoms during 1-ML-thick Ni deposition onto a clean Pt(111) surface at 823 K followed by additional epitaxial growth of Pt at 473 K in ultra-high-vacuum molecular beam epitaxy (UHVMBE) systems. Surface structures of the Pt-shell surfaces were verified using a scanning tunneling microscope in UHV. Oxygen reduction reaction (ORR) activities and structural stabilities of the shell surfaces were evaluated in oxygen-saturated 0.1 M HClO4. The results obtained reveal that not only surface strains but also nanoscale surface morphologies of the most dense plane of Pt(111) are correlated with ORR enhancements and that the 3-ML-thick Pt shell stabilizes the topmost surfaces of Pt/M bimetallic systems.

本文言語English
ホスト出版物のタイトルPolymer Electrolyte Fuel Cells 14
編集者K. Shinohara, S. R. Narayanan, K. Swider-Lyons, A. Weber, C. Coutanceau, R. Mantz, H. A. Gasteiger, D. Jones, M. Edmundson, S. Mitsushima, V. Ramani, Y. Meas, T. Fuller, H. Uchida, F. N. Buchi, K. A. Perry, T. J. Schmidt, J. M. Fenton, P. Strasser
出版社Electrochemical Society Inc.
ページ63-74
ページ数12
3
ISBN(電子版)9781607685395
DOI
出版ステータスPublished - 2014 1 1
イベント14th Polymer Electrolyte Fuel Cell Symposium, PEFC 2014 - 226th ECS Meeting - Cancun, Mexico
継続期間: 2014 10 52014 10 9

出版物シリーズ

名前ECS Transactions
番号3
64
ISSN(印刷版)1938-5862
ISSN(電子版)1938-6737

Other

Other14th Polymer Electrolyte Fuel Cell Symposium, PEFC 2014 - 226th ECS Meeting
CountryMexico
CityCancun
Period14/10/514/10/9

ASJC Scopus subject areas

  • Engineering(all)

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