The Role of Surface States on Reduced TiO2@BiVO4 Photoanodes: Enhanced Water Oxidation Performance through Improved Charge Transfer

Chen, Hang; Li, Jingguo; Yang, Wooseok; Balaghi, S Esmael; Triana, C A; Mavrokefalos, Christos K; Patzke, Greta R

doi:10.1021/acscatal.1c00686

Citations

Citation copied

Chen, H., Li, J., Yang, W., Balaghi, S. E., Triana, C. A., Mavrokefalos, C. K., & Patzke, G. R. (2021). The Role of Surface States on Reduced TiO2@BiVO4 Photoanodes: Enhanced Water Oxidation Performance through Improved Charge Transfer. ACS Catalysis, 11, 7637–7646. https://doi.org/10.1021/acscatal.1c00686

Abstract

The efficient transfer of photogenerated carriers and improved stability against corrosion are essential to maximize the performance of photoanodes. Herein, a reduced catalytic layer formed on a TiO2 protected BiVO4 (R-TiO2@BiVO4) photoanode has been prepared for progress on both fronts. Specifically, R-TiO2@BiVO4 photoanodes at pH 8 displayed a high photocurrent of 2.1 mA cm–2 at 1.23 VRHE and a more negative onset potential of 234 mVRHE compared to pristine BiVO4. We here discovered two surface states on BiVO4 photoanodes through ph