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SrNbO2N as a Water-Splitting Photoanode with a Wide Visible-Light Absorption Band
Abstract
Strontium niobium oxynitride (SrNbO(2)N) particles were coated on fluorine-doped tin oxide (FTO) glass and examined as a photoelectrode for water splitting under visible light in a neutral aqueous solution (Na(2)SO(4), pH ≈ 6). SrNbO(2)N, which has a band gap of ca. 1.8 eV, acted as an n-type semiconductor and generated an anodic photocurrent assignable to water oxidation upon irradiation with visible-light photons with wavelengths of up to 700 nm, even without an externally applied potential. Under visible light (λ > 420 nm) with an applied potential of +1.0-1.55 V vs RHE, nearly stoichiometric H(2) and O(2) evolution was achieved using a SrNbO(2)N/FTO electrode modified with colloidal iridium oxide (IrO(2)) as a water oxidation promoter. This study presents the first example of photoelectrochemical water splitting involving an n-type semiconductor with a band gap smaller than 2.0 eV that does not require an externally applied potential.
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Cited by
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Moniz, S. J. A., Shevlin, S. A., Martin, D. J., Guo, Z.-X., & Tang, J. (2015) · Energy & Environmental Science · doi:10.1039/c4ee03271c · Cited by 2,363
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Sivula, K., & van de Krol, R. (2016) · Nature Reviews Materials · doi:10.1038/natrevmats.2015.10 · Cited by 1,645
Fujito, H., Kunioku, H., Kato, D., Suzuki, H., Higashi, M., Kageyama, H., & Abe, R. (2016) · Journal of the American Chemical Society · doi:10.1021/jacs.5b11191 · Cited by 445
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Metadata
- Authors
- Maeda, K., Higashi, M., Siritanaratkul, B., Abe, R., & Domen, K.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2011-07-26
- Volume
- 133
- Issue
- 32
- Pages
- 12334-12337
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2072259844
- Cited by
- 233
- References
- 0
- FWCI
- 7.36
- Type
- journal article
- Language
- en
- Open access
- closed
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- Maeda, K., Higashi, M., Siritanaratkul, B., Abe, R., & Domen, K. (2011). SrNbO2N as a Water-Splitting Photoanode with a Wide Visible-Light Absorption Band. Journal of the American Chemical Society. https://doi.org/10.1021/ja203391w
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