TY - JOUR
T1 - In-situ identification of RuO4 as the corrosion product during oxygen evolution on ruthenium in acid media
AU - Kötz, R.
AU - Stucki, S.
AU - Scherson, Daniel Alberto
AU - Kolb, D. M.
PY - 1984/8/24
Y1 - 1984/8/24
N2 - 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.
AB - 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.
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U2 - 10.1016/0022-0728(84)80187-4
DO - 10.1016/0022-0728(84)80187-4
M3 - Article
AN - SCOPUS:0021479997
VL - 172
SP - 211
EP - 219
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
SN - 0022-0728
IS - 1-2
ER -