Journal
SMALL
Volume 14, Issue 19, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201703860
Keywords
alpha-Fe2O3 nanorods; DFT calculations; photoelectrochemical water splitting; Sb doping; SnO2 nanorods
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Funding
- Czech-bavarian grant [8E15B009]
- European Regional Development Fund [CZ.02.1.01/0.0/0.0/15_003/0000416]
- University of Ostrava [IRP201557]
- IT4 Innovations National Supercomputing Center [LM2015070]
- Los Alamos LDRD
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Here, a Sb-doped SnO2 (ATO) nanorod underneath an alpha-Fe2O3 nanorod sheathed with TiO2 for photoelectrochemical (PEC) water splitting is reported. The experimental results, corroborated with theoretical analysis, demonstrate that the ATO nanorod underlayer effect on the alpha-Fe2O3 nanorod sheathed with TiO2 enhances the PEC water splitting performance. The growth of the well-defined ATO nanorods is reported as a conductive underlayer to improve alpha-Fe2O3 PEC water oxidation performance. The alpha-Fe2O3 nanorods grown on the ATO nanorods exhibit improved performance for PEC water oxidation compared to alpha-Fe2O3 grown on flat fluorine-doped tin oxide glass. Furthermore, a simple and facile TiCl4 chemical treatment further introduces TiO2 passivation layer formation on the alpha-Fe2O3 to reduce surface recombination. As a result, these unique nanostructures show dramatically improved photo-current density (139% higher than that of the pure hematite nanorods).
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