A new type of water splitting system composed of two different TiO2 photocatalysts (anatase, rutile) and a IO3-/I- shuttle redox mediator

Authors
Abe, R Sayama, K Domen, K Arakawa, H
Citation
R. Abe et al., A new type of water splitting system composed of two different TiO2 photocatalysts (anatase, rutile) and a IO3-/I- shuttle redox mediator, CHEM P LETT, 344(3-4), 2001, pp. 339-344
Citations number
6
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
CHEMICAL PHYSICS LETTERS
ISSN journal
00092614 → ACNP
Volume
344
Issue
3-4
Year of publication
2001
Pages
339 - 344
Database
ISI
SICI code
0009-2614(20010824)344:3-4<339:ANTOWS>2.0.ZU;2-U
Abstract
A new photocatalytic reaction that splits water into H-2 and O-2 was design ed by a two-step photoexcitation system composed of a IO3-/I- shuttle redox mediator and two different TiO2 photocatalysts, Pt-loaded TiO2-anatase for H-2 evolution and TiO2-rutile for O-2 evolution. Simultaneous gas evolutio n of H-2(180 mu mol/h) and O-2(90 mu mol/h) was observed from a basic (pH = 11) NaI aqueous suspension of two different TiO2 photocatalysts under UV i rradiation (lambda > 300 =, 400 W high-pressure Hg lamp). (C) 2001 Elsevier Science B.V. All rights reserved.