Sub-nano CoOx attached onto WO3 for efficient photocatalytic and photoelectrochemical water oxidation

Abstract

Here, a facile strategy is reported for attaching a sub-nano cobalt oxide catalyst onto a WO₃ surface using Co-EDTA as precursor, which greatly improved the WO₃ performance in OER to give a photocatalytic O₂ evolution rate of 314.3 μmol h⁻¹ and a photocurrent density of around 2.07 mA cm⁻² at 1.3 V vs. Ag/AgCl in photoelectrochemical water oxidation.