The effect of severe thermal pretreatment on the redox behaviour of gold in aqueous acid solution
| Autor: | Marcus B. Mooney, L. Declan Burke, Vincent E. Lodge, Lisa M. Hurley |
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| Rok vydání: | 2001 |
| Předmět: |
Aqueous solution
Inorganic chemistry chemistry.chemical_element engineering.material Condensed Matter Physics Electrochemistry Redox Metal chemistry Chemisorption visual_art engineering visual_art.visual_art_medium General Materials Science Noble metal Electrical and Electronic Engineering Platinum Inert gas |
| Zdroj: | Journal of Solid State Electrochemistry. 5:250-260 |
| ISSN: | 1432-8488 |
| DOI: | 10.1007/s100080000152 |
| Popis: | Severe thermal pretreatment of gold wire electrodes in an inert gas atmosphere resulted in the appearance of dramatic premonolayer oxidation responses, which in some instances commenced at 0.25 V (RHE), for the resulting active gold electrodes in aqueous acid media. Similar behaviour was reported earlier for platinum and gold activated by cathodic pretreatment in acid solution; these active noble metal surfaces are evidently more susceptible to oxidation than bulk copper. Such behaviour was attributed to the effect of surface disorder; many of the metal atoms at the interface are assumed to be in a very active, metastable state possessing quite low lattice stabilization energy. Premonolayer oxidation responses are again correlated with electrocatalytic behaviour and the existence of unusual chemisorption behaviour for molecules reacting at highly active states of metals is outlined. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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