Synergism of Interface and Electronic Effects: Bifunctional N‐Doped Ni 3 S 2 /N‐Doped MoS 2 Hetero‐Nanowires for Efficient Electrocatalytic Overall Water Splitting

The realization of water electrolysis on the basis of highly active, cost‐effective electrocatalysts is significant yet challenging for achieving sustainable hydrogen production from water. Herein, N‐doped Ni 3 S 2 /N‐doped MoS 2 1D hetero‐nanowires supported by Ni foam (N‐Ni 3 S 2 /N‐MoS 2 /NF) are readily synthesized through a chemical transformation strategy by using NiMoO 4 nanowire array growth on Ni foam (NiMoO 4 /NF) as the starting material. With the in situ generation of Ni 3 S 2 /MoS 2 heterointerfaces within nanowires and the incorporation of N − anions, an extraordinary hydrophilic nature with abundant, well‐exposed active sites and optimal reaction dynamics for both oxidation and reduction of water are obtained. Attributed to these properties, as‐converted N‐Ni 3 S 2 /N‐MoS 2 /NF exhibits highly efficient electrocatalytic activities for both hydrogen and oxygen evolution reactions under alkaline conditions. The superior bifunctional properties of N‐Ni 3 S 2 /N‐MoS 2 /NF enable it to effectively catalyze the overall water‐splitting reaction.