Photochemical and electrochemical co-regulation of the BiVO4 photoanode for water splitting†
Abstract
A novel pretreatment strategy that can regulate the amount of oxygen vacancies (Ovac) across the wormlike-BiVO4 photoanode by photochemical and electrochemical co-processing. Upon decorating NiFeOx as an oxygen evolution cocatalyst for promoting the surface oxidation kinetics, a record-high photocurrent density of 6.42 mA cm−2 is obtained at 1.23 vs. RHE (100 mW cm−2).