Catalyst Modified Ternary Oxide Photoanodes for Photoelectrochemical Water Splitting

Tuesday, 26 May 2015: 16:20
Conference Room 4D (Hilton Chicago)
S. K. Pilli (University of Nevada, Reno), T. E. Furtak (Colorado School of Mines), D. Chidambaram (University of Nevada Reno), T. G. Deutsch (NREL), J. A. Turner (National Renewable Energy Laboratory), and A. M. Herring (Colorado School of Mines)
Recently, BiVO4 with moderate band gap of 2.4-2.6 eV and conduction band edge at 0 V vs. NHE at pH 0, has emerged as a promising water oxidation photoanode. However, water oxidation activity of BiVO4 is relatively low compared to the theoretical efficiency that could be achieved with this material. Poor charge carrier separation characteristics, relatively low electron transport properties and slow charge transfer at electrode-electrolyte interface are attributed to the poor performance characteristics of BiVO4 photoelectrode. However, recent advances in the material science and the development of efficient water oxidation electrocatalysts have assisted to design BiVO4 photoelectrodes with enhanced efficiencies. For this instance, various strategic approaches that were intended towards the enhancement of charge carrier separation, light absorption and charge injection characteristics of BiVO4 photoelectrodes and recent studies on application of these modified BiVO4 electrodes for solar energy conversion are presented in this talk.