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Title: Sb-Doped SnO 2 Nanorods Underlayer Effect to the α-Fe 2O 3 Nanorods Sheathed with TiO 2 for Enhanced Photoelectrochemical Water Splitting

Abstract

In this paper, a Sb-doped SnO 2 (ATO) nanorod underneath an α-Fe 2O 3 nanorod sheathed with TiO 2 for photoelectrochemical (PEC) water splitting is reported. The experimental results, corroborated with theoretical analysis, demonstrate that the ATO nanorod underlayer effect on the α-Fe 2O 3 nanorod sheathed with TiO 2 enhances the PEC water splitting performance. The growth of the well-defined ATO nanorods is reported as a conductive underlayer to improve α-Fe 2O 3 PEC water oxidation performance. The α-Fe 2O 3 nanorods grown on the ATO nanorods exhibit improved performance for PEC water oxidation compared to α-Fe 2O 3 grown on flat fluorine-doped tin oxide glass. Furthermore, a simple and facile TiCl 4 chemical treatment further introduces TiO 2 passivation layer formation on the α-Fe 2O 3 to reduce surface recombination. Finally, as a result, these unique nanostructures show dramatically improved photocurrent density (139% higher than that of the pure hematite nanorods).

Authors:
ORCiD logo [1];  [2];  [3];  [4];  [2];  [5];  [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Palacký Univ., Olomouc (Czech Republic). Regional Centre of Advanced Technologies and Materials. Dept. of Physical Chemistry
  2. Palacký Univ., Olomouc (Czech Republic). Regional Centre of Advanced Technologies and Materials. Dept. of Physical Chemistry
  3. Univ. of Ostrava (Czech Republic). Dept. of Physics
  4. Univ. of Erlangen-Nuremberg, Erlangen (Germany). Dept. of Materials Science and Engineering
  5. Palacký Univ., Olomouc (Czech Republic). Regional Centre of Advanced Technologies and Materials. Dept. of Physical Chemistry; Univ. of Erlangen-Nuremberg, Erlangen (Germany). Dept. of Materials Science and Engineering
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Palacký Univ., Olomouc (Czech Republic); Univ. of Ostrava (Czech Republic); Univ. of Erlangen-Nuremberg, Erlangen (Germany)
Sponsoring Org.:
USDOE; LANL Laboratory Directed Research and Development (LDRD) Program; Czech-Bavarian Grant; European Regional Development Fund (ERDF); Univ. of Ostrava (Czech Republic)
OSTI Identifier:
1463497
Report Number(s):
LA-UR-18-21360
Journal ID: ISSN 1613-6810
Grant/Contract Number:  
AC52-06NA25396; 8E15B009; CZ.02.1.01/0.0/0.0/15_003/0000416; IRP201557
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Small
Additional Journal Information:
Journal Volume: 14; Journal Issue: 19; Journal ID: ISSN 1613-6810
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; α-Fe 2O 3 nanorods; DFT calculations; photoelectrochemical water splitting; Sb doping; SnO 2 nanorods

Citation Formats

Han, Hyungkyu, Kment, Stepan, Karlicky, Frantisek, Wang, Lei, Naldoni, Alberto, Schmuki, Patrik, and Zboril, Radek. Sb-Doped SnO2 Nanorods Underlayer Effect to the α-Fe2O3 Nanorods Sheathed with TiO2 for Enhanced Photoelectrochemical Water Splitting. United States: N. p., 2018. Web. doi:10.1002/smll.201703860.
Han, Hyungkyu, Kment, Stepan, Karlicky, Frantisek, Wang, Lei, Naldoni, Alberto, Schmuki, Patrik, & Zboril, Radek. Sb-Doped SnO2 Nanorods Underlayer Effect to the α-Fe2O3 Nanorods Sheathed with TiO2 for Enhanced Photoelectrochemical Water Splitting. United States. doi:10.1002/smll.201703860.
Han, Hyungkyu, Kment, Stepan, Karlicky, Frantisek, Wang, Lei, Naldoni, Alberto, Schmuki, Patrik, and Zboril, Radek. Sat . "Sb-Doped SnO2 Nanorods Underlayer Effect to the α-Fe2O3 Nanorods Sheathed with TiO2 for Enhanced Photoelectrochemical Water Splitting". United States. doi:10.1002/smll.201703860. https://www.osti.gov/servlets/purl/1463497.
@article{osti_1463497,
title = {Sb-Doped SnO2 Nanorods Underlayer Effect to the α-Fe2O3 Nanorods Sheathed with TiO2 for Enhanced Photoelectrochemical Water Splitting},
author = {Han, Hyungkyu and Kment, Stepan and Karlicky, Frantisek and Wang, Lei and Naldoni, Alberto and Schmuki, Patrik and Zboril, Radek},
abstractNote = {In this paper, 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. Finally, as a result, these unique nanostructures show dramatically improved photocurrent density (139% higher than that of the pure hematite nanorods).},
doi = {10.1002/smll.201703860},
journal = {Small},
issn = {1613-6810},
number = 19,
volume = 14,
place = {United States},
year = {2018},
month = {4}
}

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