Abstract
Ternary IrO2-Sb2Os-SnO2anode has shown its superiorities over IrO2and many other electrocatalysts for O2evolution, in terms of electrochemical stability, activity and cost. The performance of IrO2-Sb2O5-SnO2anodes is affected by its electrochemical properties and operating conditions. In this paper, the electrochemical stability and activity of the Ti/IrO2-Sb2O5-SnO2anodes prepared with three different geometries were investigated under different operating conditions. It was found that anodes with large mean curvature have high electrochemical stability. Although increasing temperature results in a decrease in the stability of Ti/IrO2-Sb2O5-SnO2, the anode with a mean curvature of 200 m-1still shows acceptable service life even at 70°C. This tolerance of high temperature was attributed to the thermal expansion difference between the substrate and the coating layer, the redox window for Ir(V)Z Ir(IV) conversion, and the redox reversibility of Sb and Sn species in the coating layer. 2010.
Original language | English |
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Pages (from-to) | 1797-1805 |
Number of pages | 9 |
Journal | Journal of Applied Electrochemistry |
Volume | 40 |
Issue number | 10 |
DOIs | |
Publication status | Published - 1 Oct 2010 |
Externally published | Yes |
Keywords
- DSA
- Electrochemical process
- Geometry effect
- High temperature
- Metal oxide anode
- Service life
ASJC Scopus subject areas
- General Chemical Engineering
- Electrochemistry
- Materials Chemistry