In situ surface enhanced Raman scattering of ruthenium dioxide films in acid electrolytes

Yibo Mo, Wen Bin Cai, Jian Dong, Paul R. Carey, Daniel Alberto Scherson*

*この研究の対応する著者

研究成果: Article査読

17 被引用数 (Scopus)

抄録

Vibrational aspects of thin RuO2 films (ca. 7-8 × 10-8 mol Ru sites/cm2) electrodeposited on preroughened Au electrodes were investigated in situ in 0.50 M H2SO4 aqueous solutions using surface enhanced Raman scattering (SERS). Prominent peaks could be observed for the material in the predominantly fully oxidized state (+0.80 V vs. SCE) at 456 and 710 cm-1, and predominantly fully reduced state (+0.10 V vs. SCE) at 614 and 750 cm-1. The first set of features is in good agreement with in situ SERS measurements reported by Chan et al. for oxidized metallic Ru films in acid electrolytes polarized at high potentials and ascribed by those authors to a hydrated form of Ru oxide in the 4+ formal oxidation state. Based on our recent in situ Ru K-edge X-ray absorption fine structure of thicker RuO2 films prepared by the same procedure employed in this work, the peaks observed for the first time for the predominantly reduced film are attributed to a highly disordered oxide incorporating Ru sites in the 3+ oxidation state.

本文言語English
ジャーナルElectrochemical and Solid-State Letters
4
9
DOI
出版ステータスPublished - 2001 9月 1
外部発表はい

ASJC Scopus subject areas

  • 化学工学(全般)
  • 材料科学(全般)
  • 物理化学および理論化学
  • 電子工学および電気工学
  • 電気化学

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