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 |
|---|---|
| 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 |
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ASJC Scopus subject areas
- Chemical Engineering(all)
- Analytical Chemistry
- Electrochemistry
Cite this
In-situ identification of RuO4 as the corrosion product during oxygen evolution on ruthenium in acid media. / Kötz, R.; Stucki, S.; Scherson, Daniel Alberto; Kolb, D. M.
In: Journal of Electroanalytical Chemistry, Vol. 172, No. 1-2, 24.08.1984, p. 211-219.Research output: Contribution to journal › Article
}
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.
UR - http://www.scopus.com/inward/record.url?scp=0021479997&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0021479997&partnerID=8YFLogxK
U2 - 10.1016/0022-0728(84)80187-4
DO - 10.1016/0022-0728(84)80187-4
M3 - Article
VL - 172
SP - 211
EP - 219
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
SN - 0022-0728
IS - 1-2
ER -