Journal
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
Volume 89, Issue 6, Pages 627-648Publisher
CHEMICAL SOC JAPAN
DOI: 10.1246/bcsj.20150441
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Funding
- PRESTO/JST
- 21st Century Center of Excellence (COE)
- Research and Development in a New Interdisciplinary Field Based on Nano technology and Materials Science programs of the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan
- Grants-in-Aid for Scientific Research [25709078] Funding Source: KAKEN
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Overall water splitting using a semiconductor photocatalyst with sunlight has long been viewed as a potential means of large-scale H-2 production from renewable resources. In general, the reaction can be accomplished when a photocatalyst is modified with a suitable cocatalyst that efficiently promotes water reduction. It is therefore essential to develop both photo-catalysts and cocatalysts in harmony. Certain metal (oxy)-nitrides are potential candidates as water-splitting photo catalysts because of their suitable band edge positions for water reduction/oxidation, small band gaps (<3 eV), and stability under irradiation. However, efficient water splitting using visible-light-responsive oxynitrides has still remained a challenge. This account describes our recent developments over the last 10 years of new oxynitrides as well as cocatalysts for overall water splitting under visible light.
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