A ternary cobalt-molybdenum-vanadium layered double hydroxide nanosheet array as an efficient bifunctional electrocatalyst for overall water splitting.

Active CoMoV LDH nanosheet arrays grown on nickel foam were obtained for the first time. The doping of high-valence Mo and V in the Co-based LDH could tune the electronic structure and keep Co in a high-valence state for the OER, and high-valence Mo could also act as the active site for the HER, thus obtaining superior bifunctional water splitting performance.