NiCoP nanoparticles distributed on N-doped carbon-nanosheets loading on nickel phosphide as self-supporting electrode for efficient overall water splitting

The investigation of a bifunctional self-supporting catalytic electrode holds significant practical importance for the application of overall water splitting. In this paper, a precursor with a large specific surface is constructed by growing ZIF-67 nanosheets on nickel foam. Subsequently, Ni-Co bimetallic phosphide particles (NiCoP) are obtained through phosphating, which distributed in N-doped carbon material and loaded on nickel phosphide (NiCoP@NC-Ni3P/NF), facilitating the overall water splitting. Due to its large specific surface area, the double electron regulation of Ni and Co, as well as the synergistic interaction between NiCoP and Ni3P, NiCoP@NCNi3P/NF exhibits excellent hydrogen/oxygen evolution properties, only requiring 125.6/288.4 mV to achieve 20 mA cm(-2). Its performance of overall water splitting only requires an applied voltage of 1.54 V to reach 10 mA cm(-2). Moreover, the NiCoP particles embedded in the nitrogen-doped carbon can effectively reduce electrolyte corrosion, ensuring exceptional catalyst stability.