Catalytic effects produced by cathodisation of platinum electrodes in sulphuric solutions
| Autor: | Verónica Díaz, Carlos F. Zinola, María Elisa Martins, M.G. Sustersic, J.O. Zerbino |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Working electrode
Aqueous solution Renewable Energy Sustainability and the Environment Inorganic chemistry Energy Engineering and Power Technology chemistry.chemical_element Condensed Matter Physics Electrochemistry Electrocatalyst Catalysis Fuel Technology chemistry Electrode Platinum Hydrogen production |
| Zdroj: | International Journal of Hydrogen Energy. 33:3502-3505 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2007.12.045 |
| Popis: | The effect of strong cathodisation of platinum electrodes in 0.5 M H 2 SO 4 aqueous solutions is investigated using electrochemical and surface analysis techniques. This pretreatment activates the electrode for methanol electrocatalytic oxidation, with an approximate threefold increase in the anodic currents measured in the potential region between 0.6 and 0.75 V (versus RHE). After long cathodisation, heterogeneous sulphur deposits localised near shavings or kinks, which promote the formation and detachment of hydrogen bubbles, are detected on the platinum electrode. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect