Efficient Nonsacrificial Water Splitting through Two-Step Photoexcitation by Visible Light using a Modified Oxynitride as a Hydrogen Evolution Photocatalyst
The University of Tokyo · Tokyo Institute of Technology · +1 more institution
Abstract
A two-step photocatalytic water splitting (Z-scheme) system consisting of a modified ZrO(2)/TaON species (H(2) evolution photocatalyst), an O(2) evolution photocatalyst, and a reversible donor/acceptor pair (i.e., redox mediator) was investigated. Among the O(2) evolution photocatalysts and redox mediators examined, Pt-loaded WO(3) (Pt/WO(3)) and the IO(3)(-)/I(-) pair were respectively found to be the most active components. Combining these two components with Pt-loaded ZrO(2)/TaON achieved stoichiometric water splitting into H(2) and O(2) under visible light, achieving an apparent quantum yield of 6.3% under irradiation by 420.5 nm monochromatic light under optimal conditions, 6 times greater than the yield…
Citation impact
- FWCI
- 24.89
- Percentile
- 100%
- References
- 94
Authors
5- KMKazuhiko MaedaCorresponding
The University of Tokyo, Tokyo Institute of Technology, Hokkaido University
- MHMasanobu Higashi
The University of Tokyo, Tokyo Institute of Technology, Hokkaido University
- DLDaling Lu
The University of Tokyo, Tokyo Institute of Technology, Hokkaido University
- RARyu Abe
Tokyo Institute of Technology, The University of Tokyo, Hokkaido University
- KDKazunari Domen
The University of Tokyo, Tokyo Institute of Technology, Hokkaido University
Topics & keywords
- Water splitting
- Photocatalysis
- Photochemistry
- Photoexcitation
- Visible spectrum
- Photocatalytic water splitting
- Chemistry
- Photoluminescence
- Clean water and sanitation