Abstract
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.
Original language | English |
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Pages (from-to) | 211-219 |
Number of pages | 9 |
Journal | Journal of Electroanalytical Chemistry |
Volume | 172 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 1984 Aug 24 |
Externally published | Yes |
ASJC Scopus subject areas
- Chemical Engineering(all)
- Analytical Chemistry
- Electrochemistry