期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 54, 期 10, 页码 2955-2959出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201410961
关键词
coatings; oxynitrides; perovskite phases; photocatalysis; water splitting
资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT
- Japan)
- Japan Society for the Promotion of Science
- Artificial Photosynthesis Project of the Ministry of Economy, Trade and Industry (METI)
- MEXT (Japan) [12024046]
- [24560953]
- [23000009]
- Grants-in-Aid for Scientific Research [23000009, 24560953] Funding Source: KAKEN
One of the simplest methods for splitting water into H-2 and O-2 with solar energy entails the use of a particulate-type semiconductor photocatalyst. To harness solar energy efficiently, a new water-splitting photocatalyst that is active over a wider range of the visible spectrum has been developed. In particular, a complex perovskite-type oxynitride, LaMgxTa1-xO1+3xN2-3x (x1/3), can be employed for overall water splitting at wavelengths of up to 600nm. Two effective strategies for overall water splitting were developed. The first entails the compositional fine-tuning of a photocatalyst to adjust the bandgap energy and position by forming a series of LaMgxTa1-xO1+3xN2-3x solid solutions. The second method is based on the surface coating of the photocatalyst with a layer of amorphous oxyhydroxide to control the surface redox reactions. By combining these two strategies, the degradation of the photocatalyst and the reverse reaction could be prevented, resulting in successful overall water splitting.
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