Sb‐Doped SnO2 Nanorods Underlayer Effect to the α‐Fe2O3 Nanorods Sheathed with TiO2 for Enhanced Photoelectrochemical Water Splitting |
| |
| Authors: | Hyungkyu Han Stepan Kment Frantisek Karlicky Lei Wang Alberto Naldoni Patrik Schmuki Radek Zboril |
| |
| Affiliation: | 1. Theoretical Division and Center for Integrated Nanotechnologies, Los Alamos National Laboratory, NM, USA;2. Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacky University, Olomouc, Czech Republic;3. Department of Physics, Faculty of Science, University of Ostrava, Ostrava, Czech Republic;4. Department of Materials Science and Engineering, University of Erlangen‐Nuremberg, Erlangen, Germany |
| |
| Abstract: | Here, a Sb‐doped SnO2 (ATO) nanorod underneath an α‐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 α‐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 α‐Fe2O3 PEC water oxidation performance. The α‐Fe2O3 nanorods grown on the ATO nanorods exhibit improved performance for PEC water oxidation compared to α‐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 α‐Fe2O3 to reduce surface recombination. As a result, these unique nanostructures show dramatically improved photocurrent density (139% higher than that of the pure hematite nanorods). |
| |
| Keywords: | α ‐Fe2O3 nanorods DFT calculations photoelectrochemical water splitting Sb doping SnO2 nanorods |
|
|
