Enhancing Hydrogen Evolution Reaction by Synergistically Coupling NiMo Alloy with Ni(OH) 2 Nanosheet on Carbon Cloth

Sluggish water dissociation step severely constraints the efficiency of alkaline hydrogen evolution reaction (HER). Inspired by the merits of the favorable water dissociation ability of Ni(OH) 2 and moderate hydrogen bonding strength on NiMo alloy, in this paper, NiMo/Ni(OH) 2 nanohybrid on carbon cloth (CC) was synthesized by hydrothermal method and subsequent electrodeposition technique. XRD, SEM and XPS confirmed NiMo alloy was electrodeposited on Ni(OH) 2 nanosheet surface. Alkaline HER measurement unveiled that NiMo/Ni(OH) 2 /CC exhibited the highest alkaline HER performance with overpotential of 132 mV at 10 mA/cm 2 among as‐prepared samples, Tafel slope and EIS spectra verified the HER kinetics and the water dissociation rate were enhanced after embedding NiMo alloy into Ni(OH) 2 nanosheets. The outstanding alkaline HER performance can be assigned to the coupling effect between NiMo alloy and Ni(OH) 2 , and Ni alloying with Mo. The preeminent HER performance and facile preparation method of NiMo/Ni(OH) 2 /CC endow it with prospect application in alkaline water splitting.