Incipient Hydrous Oxide Species as Inhibitors of Reduction Processes at Noble Metal Electrode
| Autor: | J. F. O'sullivan, Laurence D. Burke, R. A. Scannell, M. J. G. Ahern, M. M. Mccarthy, K. J. O'dwyer |
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| Rok vydání: | 1990 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Inorganic chemistry Oxide chemistry.chemical_element engineering.material Condensed Matter Physics Persulfate Electrocatalyst Redox Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry Materials Chemistry Electrochemistry engineering Noble metal Cyclic voltammetry Platinum Iodate |
| Zdroj: | Journal of The Electrochemical Society. 137:2476-2481 |
| ISSN: | 1945-7111 0013-4651 |
| DOI: | 10.1149/1.2086972 |
| Popis: | Evidence is presented to illustrate the important role of hydrous oxide in noble metal electrocatalysis. It was demonstrated, for instance, that in the case of gold in acid the onset/termination potential, under potential sweep conditions, for hydrazine oxidation and persulfate or iodate reduction occurred at the end of the hydrous oxide reduction peak (recorded for a thick film growth grown by potential multicycling); there was also a maximum in the faradaic ac response for gold in acid in the same region. Both gold and platinum were investigated in acid and base electrolytes. In some cases a range of potential, rather than a discrete value, was found to be involved, different species react with (or are inhibited by) different types (or coverages) of these submonolayer species. In some, possibly electrocatalytically nondemanding, reduction reactions the hydrous oxide seemed to have little effect. |
| Databáze: | OpenAIRE |
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