Mn-Doped NiCoP Electrolysts for Highly Efficient Alkaline Water Electrolysis

Efficient overall water splitting urgently requires electrocatalysts that concurrently drive both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). Thereinto, NiCoP catalyst emerges as a promising candidate. Its distinctive electronic structure and tailored microstructure enable efficient interfacial electron transfer, thereby enhancing the overall catalytic performances. Although it possesses high activity for the HER, it remains comparatively poor for the OER performance. This dilemma limits its overall efficiency in water-splitting applications. In this work, we prepare Mn–NiCoP nanowire arrays on nickel foams (NF). This electrode requires only 75 mV for HER at 10 mA cm–2. The overall water-splitting cell provided a voltage of 1.63 V at 50 mA cm–2. It can work stably at 50 mA cm–2 for 150 h in 1 M KOH + seawater.