Large impact of strontium substitution on photocatalytic water splitting activity of BaSnO{sub 3}
- Eco-Materials and Renewable Energy Research Center (ERERC), Department of Materials Science and Engineering, Nanjing University, Nanjing 210093 (China)
The effects of Sr substitution for Ba on photocatalytic water splitting activity of BaSnO{sub 3} were investigated experimentally and theoretically. The chemical incorporation of Sr into BaSnO{sub 3} induced a great enhancement for H{sub 2} production. Density function theory calculations of Ba{sub 1-x}Sr{sub x}SnO{sub 3} (x=0, 0.5, and 1.0) reveal that the bottom of the conduction band is gradually pushed up and the contribution of the Sr 5s orbitals to the bottom of the conduction band gradually becomes dominant with the increase of Sr concentration from x=0 to x=1.0. The participation of the normally inert Sr cation in the electronic structure of the SnO{sub 3}{sup 2-} framework not only enhances the reduction ability of photoinduced electrons but also provides favorable opportunities for charge carrier transport, thus enhancing the photocatalytic activity of BaSnO{sub 3}.
- OSTI ID:
- 21016131
- Journal Information:
- Applied Physics Letters, Vol. 91, Issue 9; Other Information: DOI: 10.1063/1.2778631; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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