| 초록 |
Solar hydrogen production using water splitting photoelectrochemical cells is an attractive way to harvest solar energy into a storable energy carrier. Among oxide-based photoelectrodes, n-type BiVO4 photoanodes have been widely coupled with chip photovoltaic materials because of its early photocurrent onset potential and favorable valance band position for water oxidation. In this presentation, I will present a strategy to suppress photocorrosion of BiVO4 photoanodes during photoelectrochemical water oxidation. Anodic photocorrosion of BiVO4 photoanodes involves the loss of V5+ from the BiVO4 lattice by dissolution. The use of a V5+-saturated electrolyte, which inhibits the photooxidation-coupled dissolution of BiVO4, can serve as a simple yet effective method to enhance the photostability of BiVO4 during water oxidation for hundreds hours. |
