期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 8, 期 11, 页码 1713-1718出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2006.08.006
关键词
titanium dioxide; nanoporous electrode; charge transfer reductive doping; photoelectrochemical water oxidation; electron accumulation
Nanostructured TiO2 films can be reversibly doped by applying a potential of -0.6 V-Ag/(AgCl) in aqueous 0.1 M HClO4 for several minutes. This charge transfer reductive doping causes significant changes of the cyclic voltammograms in the dark. Furthermore, an up to 6-fold increase of the efficiency for water photooxidation is observed upon electrochemical reductive doping. Both observations are explained by the build-up of a space charge layer through agglomerates of appropriately sized and shaped nanoparticles. (c) 2006 Elsevier B.V. All rights reserved.
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