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(a) LSVs and (b) chronoamperometry analysis of IO-CuCrO2 electrodes at 0.0 V vs RHE. (c) IPCE plots of IO-CuCrO2 electrodes at +0.3 V vs RHE with monochromatic light intensity maintained at 0.8 mW cm–2. Conditions (a–c): aqueous Na2SO4 (0.1 M, pH 3), chopped visible light illumination (100 mW cm–2, AM 1.5G, λ > 420 nm), scan rate 5 mV s–1 for voltammograms, 25 °C cell temperature maintained. A geometric electrode area of 0.25 cm2 was used for all experiments.
