Electrodeposited MnCu4 intermetallic compound as an efficient oxygen evolution electrocatalyst for water splitting

In this work it is reported the synthesis by electrodeposition of CuZn 4 from alkaline solution containing citrates at pH 10. The electrodes obtained on FTO were characterized by SEM, and XRD, and these results indicate that an intermetallic compound has been obtained. The electrocatalyst was tested for its application in OER in alkaline conditions and these results showed that MnCu 4 is an effective electrocatalyst for OER and of great interest in green hydrogen production. The overpotential obtained at 10 mA cm −2 was 320 mV for OER. This study reveals a correlation between chemical composition and morphology of electrocatalyst, also the influence of work function value of MnCu 4 during the oxidation process.