Abstract
The cyclic voltammograms (CVs) and current-time curves of methanol electro-oxidation, assisted by K 2FeO 4, decomposed K 2FeO 4 and Fe(NO 3) 3 added in strong alkaline solution, were investigated on a Pt electrode. The results show that Fe(NO 3) 3 and K 2FeO 4, especially decomposed K 2FeO 4, can promote the activity and poisoning tolerance of a Pt electrocatalyst for methanol oxidation in alkaline solution. We propose that iron(III)-containing compounds such as Fe(OH) 3 and FeOOH in a strong alkaline solution tend to encourage the formation of OH adsorption (OH ads) species, which are necessary for the promotion of the CO-like intermediates of oxidation on the Pt electrode.
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