Composition-Dependent Functionality of Copper Vanadate Photoanodes
By Jiang, Chang-Ming; Segev, Gideon; Hess, Lucas H.; Liu, Guiji; Zaborski, Gregory; Toma, Francesca M.; Cooper, Jason K.; Sharp, Ian D.
Published in ACS Applied Materials & Interfaces
Abstract
To understand functional roles of constituent elements in ternary metal oxide photoanodes, essential photoelectrochemical (PEC) properties are systematically analyzed on a series of copper vanadate compounds with different Cu:V elemental ratios. Homogeneous and highly continuous thin films of ?-Cu2V2O7, ?-Cu3V2O8, Cu11V6O26, and Cu5V2O10 are grown via reactive co-sputtering and their performance characteristics for the light-driven oxygen evolution reaction are evaluated. All four compounds have similar bandgaps in the range of 1.83