Synergistic crystal facet engineering and structural control of WO3 films exhibiting unprecedented photoelectrochemical performance

Wang, Songcan, Chen, Hongjun, Gao, Guoping, Butburee, Teera, Lyu, Miaoqiang, Thaweesak, Supphasin, Yun, Jung-Ho, Du, Aijun, Liu, Gang and Wang, Lianzhou (2016) Synergistic crystal facet engineering and structural control of WO3 films exhibiting unprecedented photoelectrochemical performance. Nano Energy, 24 94-102. doi:10.1016/j.nanoen.2016.04.010


Author Wang, Songcan
Chen, Hongjun
Gao, Guoping
Butburee, Teera
Lyu, Miaoqiang
Thaweesak, Supphasin
Yun, Jung-Ho
Du, Aijun
Liu, Gang
Wang, Lianzhou
Title Synergistic crystal facet engineering and structural control of WO3 films exhibiting unprecedented photoelectrochemical performance
Journal name Nano Energy
ISSN 2211-2855
2211-3282
Publication date 2016-06-01
Year available 2016
Sub-type Article (original research)
DOI 10.1016/j.nanoen.2016.04.010
Open Access Status Not Open Access
Volume 24
Start page 94
End page 102
Total pages 9
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Language eng
Formatted abstract
WO3 nanoplate arrays with (002) oriented facets grown on fluorine doped SnO2 (FTO) glass substrates are tailored by tuning the precursor solution via a facile hydrothermal method. A 2-step hydrothermal method leads to the preferential growth of WO3 film with enriched (002) facets, which exhibits extraordinary photoelectrochemical (PEC) performance with a remarkable photocurrent density of 3.7 mA cm–2 at 1.23 V vs. revisable hydrogen electrode (RHE) under AM 1.5 G illumination without the use of any cocatalyst, corresponding to ~93% of the theoretical photocurrent of WO3. Density functional theory (DFT) calculations together with experimental studies reveal that the enhanced photocatalytic activity and better photo-stability of the WO3 films are attributed to the synergistic effect of highly reactive (002) facet and nanoplate structure which facilitates the photo–induced charge carrier separation and suppresses the formation of peroxo-species. Without the use of oxygen evolution cocatalysts, the excellent PEC performance, demonstrated in this work, by simply tuning crystal facets and nanostructure of pristine WO3 films may open up new opportunities in designing high performance photoanodes for PEC water splitting.
Keyword Facet engineering
Nanoplate structure
Photoelectrochemical water splitting
Synergistic effect
Tungsten oxide
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
HERDC Pre-Audit
Australian Institute for Bioengineering and Nanotechnology Publications
 
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