Microelectrochemical study on the surface oxidation of pt: The effects of crystal orientation and grain boundary

Mayu Sasaki, Yu Sugawara, Izumi Muto, Nobuyoshi Hara

研究成果: Article査読

1 被引用数 (Scopus)

抄録

Microelectrochemical polarization measurements of polycrystalline Pt were performed to clarify the effect of the crystal orientation and grain boundary on the surface oxidation of Pt. Cyclic voltammograms (CV) for Pt(100)-like and Pt(110)-like grains on polycrystalline Pt after mechanical polishing showed no anodic peak below 1.35V, which is similar to that for well-annealed Pt(111) single crystal. The anodic current of Pt(110)-like grain was significantly larger than Pt(100)-like. A small but concrete current increase appeared around 1.05-1.3Vin the CVof the surface including grain boundaries. This suggests the grain boundary may be the preferential site for the dissolution.

本文言語English
ページ(範囲)735-738
ページ数4
ジャーナルMaterials Transactions
55
4
DOI
出版ステータスPublished - 2014

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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