Abstract
The present work is focused on the investigation of the oxidation of BH4− ions in an alkaline solution on a low-cost ZnCo alloy deposited on the Ti surface. The Co and ZnCo alloy coatings were deposited on the Ti surface via electrodeposition. The morphology, structure and composition of the prepared catalysts were examined by FESEM and EDX. The activity of the fabricated catalysts was investigated toward the oxidation of BH4− ions by means of cyclic voltammetry and chronoamperometry. It has been determined that Co/Ti and ZnCo/Ti catalyze the oxidation of H2 generated by the catalytic hydrolysis of BH4− and direct oxidation of BH4− ions. The H2 oxidation current densities measured on both the catalysts are rather close and reach up to 60 mA cm−2, whereas the borohydride oxidation current densities are ∼3–4 times higher at −0.2 V on ZnCo/Ti than those obtained on Co/Ti and Zn/Ti.
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