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Electrocatalysis

, Volume 6, Issue 3, pp 295–299 | Cite as

Infrared Reflection Absorption Spectroscopy of OH Adsorption on the Low Index Planes of Pt

  • Hiroyuki Tanaka
  • Seiho Sugawara
  • Kazuhiko Shinohara
  • Takahiro Ueno
  • Shunsuke Suzuki
  • Nagahiro HoshiEmail author
  • Masashi NakamuraEmail author
Original Research

Abstract

The adsorption of hydroxide (OHad) on Pt has been studied on the low index planes of Pt using infrared reflection absorption spectroscopy (IRAS) in electrochemical environments. We discuss the correlation between the integrated band intensity of the bending mode of OH of Pt–OH (δ PtOH) and the charge density of the oxide formation of Pt. The band of δ PtOH is observed around 1100 cm−1, and the onset potential depends on the surface structure. The onset potential of δ PtOH on Pt(110) and Pt(100) overlaps with the hydrogen adsorption/desorption potential region. The order of the integrated band intensity of δ PtOH at 0.9 V vs RHE is opposite to the order of the oxygen reduction reaction (ORR) activity. This finding supports that the OHad is one of the species deactivating the ORR.

Keywords

IRAS Electrochemical environments Adsorption of hydroxide Oxygen reduction reaction 

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Hiroyuki Tanaka
    • 1
    • 2
  • Seiho Sugawara
    • 2
  • Kazuhiko Shinohara
    • 2
  • Takahiro Ueno
    • 1
  • Shunsuke Suzuki
    • 1
  • Nagahiro Hoshi
    • 1
    Email author
  • Masashi Nakamura
    • 1
    Email author
  1. 1.Department of Applied Chemistry and Biotechnology, Graduate School of EngineeringChiba UniversityChibaJapan
  2. 2.EV System Laboratory, Nissan Research CenterNissan Motor Co., Ltd.Yokosuka-shiJapan

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