Mo‐Doped Ni 3 S 2 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 Ni 3 S 2 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 Ni 3 S 2 /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.