Mo-Doped Ni3S2 Nanowires as High-Performance Electrocatalysts for Overall Water Splitting

The search for highly active and stable bifunctional electrocatalysts toward overall water splitting is essential for renewable energy technologies. Here, 3D Mo-doped Ni3S2 nanowire networks directly grown on Ni foam through a successive hydrothermal and sulfidization process have been synthesized. Thanks to the unique 3D hierarchical nanowire networks and efficient Mo doping, the as-synthesized Mo-doped Ni3S2/NF exhibits superior catalytic activities and stability toward HER/OER, with overpotentials of 61 and 213 mV to reach a current density of 10 mA cm(-2) for HER and OER, respectively. Furthermore, when used as both anode and cathode for overall water splitting, a cell voltage of 1.485 V is required to achieve a current density of 10 at mA cm(-2) in alkaline solution.