In the effort to develop clean energy strategies, synthesizing electrodes with high electrocatalytic properties for electrochemical water-splitting reactions is a significant challenge. In this research, a nanostructured Ni-Mn-P@Co-S electrocatalyst was synthesized using hydrothermal and electrodeposition methods. First, Co-S microwires were fabricated, followed by the deposition of a Ni-Mn-P layer via the pulsed-potential method at various frequencies and duty cycles. The results showed that a duty cycle of 0.5 and frequency of 10 Hz provided optimal performance for water-splitting reactions in an alkaline solution. The sample exhibited η10 of 63 mV and η100 of 208 mV for the hydrogen evolution reaction (HER), respectively. For the oxygen evolution reaction (OER), η10 and η100 were measured at 250 and 530 mV, respectively. The electrocatalyst demonstrated 97 % stability over 100 h at a current density of -100 mA.cm-2. This research presents an innovative and effective approach for producing electrocatalysts for water splitting.

Keywords