In-situ identification of RuO4 as the corrosion product during oxygen evolution on ruthenium in acid media

R. Kötz*, S. Stucki, Daniel Alberto Scherson, D. M. Kolb

*この研究の対応する著者

研究成果: Article査読

140 被引用数 (Scopus)

抄録

The corrosion of ruthenium during oxygen evolution in 0.5 M H2SO4 was investigated using cyclic voltammetry, the rotating ring-disc electrode technique and differential reflectance spectroscopy. Cyclic voltammetric curves exhibit a distinct reduction peak at ∼ +0.80 V vs. SCE in the negative scan provided the positive limit is extended beyond ∼ +1.2 V vs. SCE. The use of in-situ reflectance spectroscopy allows the identification of RuO4 as the main, if not the only, corrosion product. Based on these results, the voltammetric feature observed at ∼ +0.80 V vs. SCE is attributed to the reduction of RuO4 in solution. Finally, rotating ring-disc and reflectance spectroscopy measurements provide a strong indication that the onset of O2 evolution and Ru corrosion takes place at the same potential and thus the reaction pathways of both processes can be assumed to involve a common intermediate.

本文言語English
ページ(範囲)211-219
ページ数9
ジャーナルJournal of Electroanalytical Chemistry
172
1-2
DOI
出版ステータスPublished - 1984 8 24
外部発表はい

ASJC Scopus subject areas

  • 化学工学(全般)
  • 分析化学
  • 電気化学

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