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- Title
Sol-gel Synthesis, Photo- and Electrocatalytic Properties of Mesoporous TiO Modified with Transition Metal Ions.
- Authors
Smirnova, N.; Petrik, I.; Vorobets, V.; Kolbasov, G.; Eremenko, A.
- Abstract
Mesoporous nanosized titania films modified with Co, Ni, Mn, and Cu ions have been produced by templated sol-gel method and characterized by optical spectroscopy, X-ray diffraction (XRD), and Brunauer, Emmett, and Teller (BET) surface area measurement. Band gap energy and the position of flat band potentials were estimated by photoelectrochemical measurements. The films doped with transition metals possessed higher photocurrent quantum yield, as well as photo- and electrochemical activity compared to undoped samples. M/TiO (M-Co, Ni, Mn, Cu) electrodes with low dopant content demonstrate high efficiency in electrocatalytic reduction of dissolved oxygen. Polarization curves of TiO, TiO/Ni, TiO/Co, and TiO/Mn electrodes contain only one current wave (oxygen reduction current). It means that reaction proceeds without the formation of an intermediate product HO.
- Subjects
ELECTROCATALYSIS; TITANIUM dioxide; SOL-gel processes; MESOPOROUS materials; TRANSITION metal ions; OPTICAL spectroscopy
- Publication
Nanoscale Research Letters, 2017, Vol 12, Issue 1, p1
- ISSN
1931-7573
- Publication type
Article
- DOI
10.1186/s11671-017-2002-3