The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.
WO3−Fe2O3Photoanodes for Water Splitting: A Host Scaffold, Guest Absorber Approach
Open accessAbstract
Solar hydrogen production via watersplitting with hematite (Fe 2 O 3 ) has been limited by poor light absorption and a small hole diffusion length. These drawbacks can be overcome by using a high-surface-area host to support a thin layer of hematite—allowing photogenerated holes to be produced in high proximity to the semiconductor-liquid junction. Here we demonstrate the effectiveness of this concept using a nanostructured host scaffold (WO 3 ) prepared by atmospheric pressure CVD to support a thin layer of Fe 2 O 3 nanoparticles deposited by a similar method. A 20% increase in the photocurrent was observed in host−guest electrodes as compared to control films with the same amount of hematite (equivalent to a 60 nm film) deposited without the host scaffold. The improvement is attributed to an increase in the absorbed photon conversion efficiency (APCE), especially for longer wavelengths where the photon penetration depth is large in hematite. For light with a wavelength of 565 nm, the APCE improves to 8.0%, as compared to 5.7% with the control films because of the host/guest architecture.
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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
Walter, M. G., Warren, E. L., McKone, J. R., Boettcher, S. W., Mi, Q., Santori, E. A., & Lewis, N. S. (2010) · Chemical Reviews · doi:10.1021/cr1002326 · Cited by 9,388
A review of TiO2 nanoparticles
Gupta, S. M., & Tripathi, M. (2011) · Chinese Science Bulletin · doi:10.1007/s11434-011-4476-1 · Cited by 1,270
Sivula, K., Zboril, R., Le Formal, F., Robert, R., Weidenkaff, A., Tucek, J., Frydrych, J., & Grätzel, M. (2010) · Journal of the American Chemical Society · doi:10.1021/ja101564f · Cited by 937
Self-citationNature and Light Dependence of Bulk Recombination in Co-Pi-Catalyzed BiVO4 Photoanodes
Abdi, F. F., & van de Krol, R. (2012) · The Journal of Physical Chemistry C · doi:10.1021/jp3007552 · Cited by 573
Hematite-based solar water splitting: challenges and opportunities
Lin, Y., Yuan, G., Sheehan, S., Zhou, S., & Wang, D. (2011) · Energy & Environmental Science · doi:10.1039/c1ee01850g · Cited by 417
Metadata
- Authors
- Sivula, K., Formal, F. L., & Grätzel, M.
- Venue
- Chemistry of Materials
- Publisher
- American Chemical Society (ACS)
- Published
- 2009-06-08
- Volume
- 21
- Issue
- 13
- Pages
- 2862-2867
- ISSN
- 0897-4756 (ISSN-L)
- 1520-5002
- OpenAlex
- W2000223594
- Cited by
- 477
- References
- 1
- FWCI
- 15.43
- Type
- journal article
- Language
- en
- Open access
- green
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