We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
A photoelectrochemical study on the features of carbonate-catalyzed water oxidation at illuminated TiO/Solution interface.
- Authors
Kong, De-Sheng; Zhang, Xue-Di; Wang, Jing; Wang, Chao; Zhao, Xi; Feng, Yuan-Yuan; Li, Wen-Juam
- Abstract
Photoelectrochemical (PEC) measurements were performed to investigate the catalytic effect of carbonate on water splitting over TiO nanotube photoanode at low applied potentials. The photocurrent measured with the presence of carbonate with a low concentration of 5 × 10 M in 0.5 M NaClO solution of pH = 6-13 was ca. two to seven times of that measured in the absence of carbonate in solution. By adding a small amount of formate as a precursor of in situ generated carbonate in solution, the significant catalytic effect of carbonate was further evidenced. The features of the photocurrents measured under both potential dynamic and potentiostatic conditions indicated that the existence of carbonate in solution can effectively prevent the surface recombination of the photogenerated electron-hole pairs occurring at the TiO/solution interface, which was regarded as the main reason for the catalytic effect of carbonate on the PEC water splitting in this work. The related charge transfer processes during water photooxidation at the TiO/solution interface were discussed.
- Subjects
CARBONATES; HYDROGEN; SOLAR energy; NANOPARTICLES; SEMICONDUCTORS; PHOTOOXIDATION
- Publication
Journal of Solid State Electrochemistry, 2013, Vol 17, Issue 1, p69
- ISSN
1432-8488
- Publication type
Article
- DOI
10.1007/s10008-012-1854-9