Electrochemical water oxidation by photo-deposited cobalt-based catalyst on a nano-structured TiO2 electrode
2012 (English)In: Science China Chemistry, ISSN 1674-7291, Vol. 55, no 9, 1976-1981 p.Article in journal (Refereed) Published
A cobalt-based catalyst was directly photo-deposited on the surface of a widely used n-type nano-structured semiconductor (TiO2). Different thicknesses of the TiO2 films as well as different time of photo-deposition of the Co-based catalyst on TiO2 films have been optimized. It was found that the electrode with 3 layers of TiO2 film (in 8 mu m thickness) and 1 hour photo-deposition of the cobalt-based catalyst by light irradiation from a 500 W Xenon lamp gave the highest current density (similar to 5 mA/cm(2)). Using this cobalt-modified TiO2 film as a working electrode in an electrochemical device, highly efficient water oxidation has been demonstrated in a pH 7.0 aqueous solution with low overpotential.
Place, publisher, year, edition, pages
2012. Vol. 55, no 9, 1976-1981 p.
artificial photosynthesis, electrochemical water oxidation, cobalt-based catalyst, photo-deposition, water splitting
IdentifiersURN: urn:nbn:se:kth:diva-103149DOI: 10.1007/s11426-012-4551-8ISI: 000308192400039ScopusID: 2-s2.0-84866136614OAI: oai:DiVA.org:kth-103149DiVA: diva2:559419
FunderKnut and Alice Wallenberg Foundation
QC 201210172012-10-092012-10-042012-10-17Bibliographically approved