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Efficient Suppression of Electron–Hole Recombination in Oxygen-Deficient Hydrogen-Treated TiO2 Nanowires for Photoelectrochemical Water Splitting
Open accessAbstract
High Resolution Image Download MS PowerPoint Slide There is an increasing level of interest in the use of black TiO 2 prepared by thermal hydrogen treatments (H:TiO 2 ) due to the potential to enhance both the photocatalytic and the light-harvesting properties of TiO 2 . Here, we examine oxygen-deficient H:TiO 2 nanotube arrays that have previously achieved very high solar-to-hydrogen (STH) efficiencies due to incident photon-to-current efficiency (IPCE) values of >90% for photoelectrochemical water splitting at only 0.4 V vs RHE under UV illumination. Our transient absorption (TA) mechanistic study provides strong evidence that the improved electrical properties of oxygen-deficient TiO 2 enables remarkably efficient spatial separation of electron–hole pairs on the submicrosecond time scale at moderate applied bias, and this coupled to effective suppression of microsecond to seconds charge carrier recombination is the primary factor behind the dramatically improved photoelectrochemical activity.
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Citations
Cites
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
Cited by
Engineering heterogeneous semiconductors for solar water splitting
Li, X., Yu, J., Low, J., Fang, Y., Xiao, J., & Chen, X. (2015) · Journal of Materials Chemistry A · doi:10.1039/c4ta04461d · Cited by 1,888
Progress in Developing Metal Oxide Nanomaterials for Photoelectrochemical Water Splitting
Yang, Y., Niu, S., Han, D., Liu, T., Wang, G., & Li, Y. (2017) · Advanced Energy Materials · doi:10.1002/aenm.201700555 · Cited by 655
Self-citationOxygen defective metal oxides for energy conversion and storage
Wang, G., Yang, Y., Han, D., & Li, Y. (2017) · Nano Today · doi:10.1016/j.nantod.2017.02.009 · Cited by 353
Self-citationBlack TiO2: A review of its properties and conflicting trends
Rajaraman, T. S., Parikh, S. P., & Gandhi, V. G. (2020) · Chemical Engineering Journal · doi:10.1016/j.cej.2019.123918 · Cited by 323
Gupta, T., Samriti, Cho, J., & Prakash, J. (2021) · Materials Today Chemistry · doi:10.1016/j.mtchem.2021.100428 · Cited by 268
Metadata
- Authors
- Pesci, F. M., Wang, G., Klug, D. R., Li, Y., & Cowan, A. J.
- Venue
- The Journal of Physical Chemistry C
- Publisher
- American Chemical Society (ACS)
- Published
- 2013-11-22
- Volume
- 117
- Issue
- 48
- Pages
- 25837-25844
- ISSN
- 1932-7447 (ISSN-L)
- 1932-7455
- OpenAlex
- W2000849324
- Cited by
- 264
- References
- 1
- FWCI
- 5.41
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- Pesci, F. M., Wang, G., Klug, D. R., Li, Y., & Cowan, A. J. (2013). Efficient Suppression of Electron–Hole Recombination in Oxygen-Deficient Hydrogen-Treated TiO2 Nanowires for Photoelectrochemical Water Splitting. The Journal of Physical Chemistry C. https://doi.org/10.1021/jp4099914
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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