Abstract
The electrocatalytic activities of Ru-Pt binary oxide electrodes prepared by thermal decomposition for both oxygen and chlorine evolution reactions (OER and CER) were investigated by cyclic voltammetry (CV) and log i/E relationships (Tafel study). Both CV and Tafel studies revealed that the electrodes from the coating solutions with 60 and 20 mol % Pt content possessed the maximum apparent activity for OER and optimal apparent activity for CER/hypochlorite production, respectively. The specific activity (i/q*) revealed that mixing of the RuO2 and PtOx had no synergistic effects for OER due to the occurrence of phase segregation, which was revealed by element mapping/surface morphologies and Auger electron spectroscopy. Lower current efficiencies for hypochlorite production were found on the freshly prepared binary electrodes (type I electrodes) than on those having been treated by repetitive CVs (type II electrodes). Stability testing of both type I and II electrodes was measured in 0.5 M NaCl solution at 300 mA cm-2 for 480 h, indicating that both type I and II electrodes are quite stable under the above conditions.
Original language | English |
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Pages (from-to) | 72-82 |
Number of pages | 11 |
Journal | Journal of Applied Electrochemistry |
Volume | 26 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1996 Jan 1 |
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Electrochemistry
- Materials Chemistry