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Hydrogen-treated WO3 nanoflakes show enhanced photostability
Abstract
Here we report that photostability and photoactivity of WO3 for water oxidation can be simultaneously enhanced by controlled introduction of oxygen vacancies into WO3 in hydrogen atmosphere at elevated temperatures. In comparison to pristine WO3, the hydrogen-treated WO3 nanoflakes show an order of magnitude enhanced photocurrent, and more importantly, exhibit extraordinary stability for water oxidation without loss of photoactivity for at least seven hours. The enhanced photostability is attributed to the formation of substoichiometric WO3−x after hydrogen treatment, which is highly resistive to the re-oxidation and peroxo-species induced dissolution. This work constitutes the first example where WO3 can be stabilized for water oxidation in neutral medium without the need for oxygen evolution catalysts. The demonstration of electrochemically stable WO3 could open up new opportunities for WO3 based photoelectrochemical and photocatalytic applications.
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Citations
Cites
Electrochemical Photolysis of Water at a Semiconductor Electrode
FUJISHIMA, A., & HONDA, K. (1972) · Nature · doi:10.1038/238037a0 · Cited by 34,169
Cited by
Transition‐Metal (Co, Ni, and Fe)‐Based Electrocatalysts for the Water Oxidation Reaction
Han, L., Dong, S., & Wang, E. (2016) · Advanced Materials · doi:10.1002/adma.201602270 · Cited by 1,769
Defect engineering in earth-abundant electrocatalysts for CO2 and N2 reduction
Wang, Q., Lei, Y., Wang, D., & Li, Y. (2019) · Energy & Environmental Science · doi:10.1039/c8ee03781g · Cited by 574
Self-citationOxygen vacancies in metal oxides: recent progress towards advanced catalyst design
Zhuang, G., Chen, Y., Zhuang, Z., Yu, Y., & Yu, J. (2020) · Science China Materials · doi:10.1007/s40843-020-1305-6 · Cited by 499
Tan, H. L., Amal, R., & Ng, Y. H. (2017) · Journal of Materials Chemistry A · doi:10.1039/c7ta04441k · Cited by 459
Hetero-type dual photoanodes for unbiased solar water splitting with extended light harvesting
Kim, J. H., Jang, J.-W., Jo, Y. H., Abdi, F. F., Lee, Y. H., van de Krol, R., & Lee, J. S. (2016) · Nature Communications · doi:10.1038/ncomms13380 · Cited by 344
Metadata
- Authors
- Wang, G., Ling, Y., Wang, H., Yang, X., Wang, C., Zhang, J. Z., & Li, Y.
- Venue
- Energy & Environmental Science
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2012
- Volume
- 5
- Issue
- 3
- Pages
- 6180
- ISSN
- 1754-5692 (ISSN-L)
- 1754-5706
- OpenAlex
- W2013868953
- Cited by
- 766
- References
- 1
- FWCI
- 12.87
- Type
- journal article
- Language
- en
- Open access
- closed
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- Wang, G., Ling, Y., Wang, H., Yang, X., Wang, C., Zhang, J. Z., & Li, Y. (2012). Hydrogen-treated WO3 nanoflakes show enhanced photostability. Energy & Environmental Science. https://doi.org/10.1039/c2ee03158b
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