Bismuth vanadate is one of the most efficient photoanode materials for solar water-splitting. However, its performance is limited by two main factors: poor charge separation and slow water oxidation kinetics. Herein, Rh–Ci/HCO3− hetero-/homogenous dual co-catalysts were introduced on the BiVO4 surface to improve the water oxidation performance. This Rh–Ci/HCO3− dual co-catalyst system improved the water oxidation activity of BiVO4 by enhancing the charge injection efficiency and stabilizing the photoelectrochemical water oxidation kinetics. BiVO4 decorated with Rh–Ci/HCO3− exhibited a higher photocurrent (2.011 mA∙cm−2) at 1.23 VRHE than bare BiVO4 (1.217 mA∙cm−2).
This study was supported by the C1 Gas Refinery Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Science, ICT, and Future Planning (2015M3D3A1A01064899). This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education (2020R1I1A1A01073326).
