An electrodeposited cobalt–selenide-based film as an efficient bifunctional electrocatalyst for full water splitting

An amorphous cobalt–cobalt oxide/cobalt selenide composite film has been fabricated directly on a 3D macro-porous Ni foam substrate by a facile electrodeposition method, which can be an efficient and cheap bifunctional electrocatalyst for both the OER and HER and offer potential applications in the field of full water splitting.