Proceedings of nanoGe September Meeting 2017 (NFM17)
Publication date: 20th June 2016
Bismuth Vanadate has emerged as one of the most interesting n-type metal oxides for different applications. As a photoanode for water oxidation, this material holds the record solar to hydrogen (STH) conversion efficiency (8.1 %) among the family of metal oxides, when combined with a double-junction GaAs/InGaAsP photovoltaic device.[1] Additionally, impressive enhancement of the photoelectrochemical behavior has been reported upon prolonged illumination at open circuit conditions.[2, 3] In the present contribution, we show that the functionalities of BiVO4 can be tuned upon modification of the semiconductor-liquid interface by the deposition of different nanometric layers/particles. Enhanced photoelectrochemical water oxidation is demonstrated upon deposition of Fe2O3, AgPO3, and CoFe Prussian blue nanoparticles.[4] The mechanistic insights leading to improved functional performance will be discussed. Alternatively, when combined with lead oxide, Bismuth Vanadate provides a synergistic photocapacitive platform with high specific capacitance, high open circuit potential and stable charge/discharge cycling, opening promising research avenues in the development of novel solar energy storage strategies.[5]
References
[1] Y. Pihosh, I. Turkevych, K. Mawatari, J. Uemura, Y. Kazoe, S. Kosar, K. Makita, T. Sugaya, T. Matsui, D. Fujita, M. Tosa, M. Kondo and T. Kitamori, Scientific Reports, 2015, 5, 11141.
[2] B.J. Trzesniewski and W.A. Smith, Journal of Materials Chemistry A, 2016, 4, 2919-2926.
[3] B.J. Trzesniewski, I.A. Digdaya, I. Herraiz-Cardona, S. Ravishankar, T. Nagaki, D.A. Vermaas, A. Longo, S. Gimenez and W.A. Smith, Energy and Environmental Science, (2017), in press.
[4] M.N. Shaddad, M.A. Ghanem, A.M. Al-Mayouf, S. Gimenez, J. Bisquert and I. Herraiz-Cardona, Chemsuschem, 2016, 9, 2779-2783.
[5] S. Safshekan, I. Herraiz-Cardona, D. Cardenas-Morcoso, R. Ojani, M. Haro, S. Gimenez, ACS Energy Letters, 2017, 2 (2), 469–475.
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