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Photodynamics of NaTaO3 Catalysts for Efficient Water Splitting
Abstract
Electrons photoexcited in catalysts based on NaTaO 3 were observed by time-resolved infrared (IR) absorption spectroscopy. The electrons excited by 266-nm pump pulse exhibited a monotonic absorption of mid-IR light. The recombination kinetics of the excited electrons with holes was monitored in a vacuum as a function of time delay ranging from 100 ns to 1 s. When the Na content and La dopant were optimized to achieve high activity in the steady-state reaction of water splitting, the recombinative decay was hindered to increase the amount of electrons. The electrons were transferred to NiO ultrafine particles, loaded as a cocatalyst, within 1 μs following the pulse excitation. Exposing the catalysts to water vapor affected the electron decay and efficient electron transfer to water via the cocatalyst was evidenced.
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Cited by
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Vequizo, J. J. M., Matsunaga, H., Ishiku, T., Kamimura, S., Ohno, T., & Yamakata, A. (2017) · ACS Catalysis · doi:10.1021/acscatal.7b00131 · Cited by 264
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Metadata
- Authors
- Yamakata, A., Ishibashi, T.-A., Kato, H., Kudo, A., & Onishi, H.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 2003-12-01
- Volume
- 107
- Issue
- 51
- Pages
- 14383-14387
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W2002159337
- Cited by
- 159
- References
- 0
- FWCI
- 1.69
- Type
- journal article
- Language
- en
- Open access
- closed
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