Multiple interface coupling triggered built-in electric field over double-sandwiched RGO/cobalt silicate/cobalt-iron phosphide for improving the overall water-splitting performance

Abstract

In this work, multiple interface coupling between rGO, CS, and (Co,Fe) x P y triggers a built-in electric field, which lowers the energy barrier for HER by facilitating H–OH bond dissociation and accelerates OER by promoting OH − adsorption.