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Photocatalytic Overall Water Splitting under Visible Light Using ATaO2N (A = Ca, Sr, Ba) and WO3 in a IO3−/I− Shuttle Redox Mediated System
Abstract
Three mixed tantalum oxynitrides, ATaO 2 N (A = Ca, Sr, Ba), prepared by heating amorphous A 2 Ta 2 O 7 under NH 3, are applied in a two-step photoexcitation water-splitting system as a photocatalyst for H 2 evolution. Platinum-loaded CaTaO 2 N and BaTaO 2 N are demonstrated to be active for H 2 evolution in the presence of methanol or I − as an electron donor, whereas SrTaO 2 N is unable to produce H 2 stably in the presence of I − due to self-oxidative decomposition accompanied by N 2 production. The combination of Pt−CaTaO 2 N or Pt−BaTaO 2 N with Pt−WO 3 achieves overall water splitting under visible irradiation. Pt−BaTaO 2 N is also demonstrated to be photoactive at wavelengths up to 660 nm, representing the first example of an overall water-splitting system in which visible light at wavelengths longer than 600 nm is effectively utilized for H 2 evolution.
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Cited by
Semiconductor-based Photocatalytic Hydrogen Generation
Chen, X., Shen, S., Guo, L., & Mao, S. S. (2010) · Chemical Reviews · doi:10.1021/cr1001645 · Cited by 7,876
Abe, R. (2010) · Journal of Photochemistry and Photobiology C: Photochemistry Reviews · doi:10.1016/j.jphotochemrev.2011.02.003 · Cited by 1,223
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Metadata
- Authors
- Higashi, M., Abe, R., Takata, T., & Domen, K.
- Venue
- Chemistry of Materials
- Publisher
- American Chemical Society (ACS)
- Published
- 2009-03-26
- Volume
- 21
- Issue
- 8
- Pages
- 1543-1549
- ISSN
- 0897-4756 (ISSN-L)
- 1520-5002
- OpenAlex
- W2089399286
- Cited by
- 321
- References
- 0
- FWCI
- 9.66
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Photocatalytic Overall Water Splitting under Visible Light Using ATaO2N (A = Ca, Sr, Ba) and WO3 in a IO3−/I− Shuttle Redox Mediated System. https://app.cochat.ai/papers/10.1021/cm803145n
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- Higashi, M., Abe, R., Takata, T., & Domen, K. (2009). Photocatalytic Overall Water Splitting under Visible Light Using ATaO2N (A = Ca, Sr, Ba) and WO3 in a IO3−/I− Shuttle Redox Mediated System. Chemistry of Materials. https://doi.org/10.1021/cm803145n
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