Journal
CHEMPHOTOCHEM
Volume 3, Issue 1, Pages 37-45Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cptc.201800157
Keywords
artificial photosynthesis; carbon dioxide reduction; doped TiO2; photoelectrochemistry; water splitting
Categories
Funding
- JSPS [JP16H06441]
- CREST program Molecular Technology (JST) [JPMJCR13L1]
- Noguchi Institute
- Murata Research Foundation
- Academy for Co-creative Education of Environment and Energy Science (ACEEES) in Tokyo Tech
- [JP16H06130]
Ask authors/readers for more resources
Non-oxide materials such as oxynitrides are good candidates as photoanodes for visible-light-driven water oxidation, but most of them suffer from oxidative degradation by photogenerated holes, resulting in low stability. Herein we developed a photoanode using a visible-light-responsive TiO2 powder doped with tantalum and nitrogen (TiO2:Ta/N) for water oxidation. The Ta/N codoping enabled a stable anodic photocurrent response attributable to water oxidation under visible-light irradiation. Surface modification of the TiO2:Ta/N anode with RuOx species further facilitated water oxidation catalysis, achieving stable O-2 evolution over 5 h of operation with no sign of deactivation. Operando XAFS measurements revealed an important function of the RuOx species as a collector of photogenerated holes in TiO2:Ta/N, facilitating the photoelectrochemical water oxidation. Visible-light-driven H-2 evolution and solar-driven CO2 reduction into CO were both achieved by using water as an electron donor in photoelectrochemical cells with the TiO2:Ta/N photoanode coupled to a Pt cathode and a Ru(II)-Re(I) binuclear complex photocathode, respectively.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available