A novel pretreatment strategy that can regulate the amount of oxygen vacancies (O) across the wormlike-BiVO photoanode by photochemical and electrochemical co-processing. Upon decorating NiFeO as an oxygen evolution cocatalyst for promoting the surface oxidation kinetics, a record-high photocurrent density of 6.42 mA cm is obtained at 1.23 . RHE (100 mW cm).
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