Abstract
An electrochemical approach towards synthesis of highly active, stable and surface selective towards chlorine evolution reaction (CER) of (Zn, Ru)-doped TiO2 (Ru0.26Ti0.73Zn0.01Ox) for the purpose of electrochemical generation of KClO3 is demonstrated. The essential ingredients of this approach consists of (1) co-electrodeposition of Ru, Ti and Zn as metallic alloy and subsequent annealing to oxide (2) dissolution under electrochemically oxidative acidic environment of Ru and Zn-rich surface clusters having high selectivity towards oxygen evolution reaction (OER) leaving Ti-enriched structure that is more selective to CER and (3) using this electrocatalyst for KClO3 production under near-neutral pH conditions. Dissolution of Ru- and Zn enriched surfaces result in higher porosity and surface roughness. Furthermore, this electrochemical dissolution of (Zn, Ru)-rich surface results in electrocatalytic structure that is self-selective towards KClO3 formation with higher specific activity.
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