| Autor: |
Lev I. Krishtalik, L. A. Khanova |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
Journal of Electroanalytical Chemistry. 660:224-229 |
| ISSN: |
1572-6657 |
| DOI: |
10.1016/j.jelechem.2011.01.016 |
| Popis: |
Kinetics of hydrogen evolution reaction on the electrodeposited gold electrode is studied. In semi-logarithmic coordinates, polarization curves consist of two linear segments with Tafel slopes 0.06 V at lower overpotentials and 0.12 V at the higher ones. The kinetics in the higher-slope region depends on the solution pH and the ψ1-potential (effects of the ionic strength and of the presence of the surface-active tetrabutylammonium cation) as it is predicted by the theory of the ordinary slow discharge. In the lower-slope region, overpotential does not depend on pH and ψ1-potential; this is in full accordance with the theory of the barrierless discharge. We nevertheless analyze also several alternatives to the theory of barrierless discharge for the explanation of the low-slope region, but we show that they are not consistent with the experimental data. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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