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https://doi.org/10.5562/cca3175

TiO2 From Colloidal Dispersion as Support in Pt/TiO2 Nanocomposite for Electrochemical Applications

Milica Košević orcid id orcid.org/0000-0002-2105-4425 ; Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, RS-11000 Belgrade, Serbia
Gavrilo Šekularac ; Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, RS-11000 Belgrade, Serbia
Ljiljana Živković orcid id orcid.org/0000-0003-2243-2835 ; Vinča Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, RS-11001 Belgrade, Serbia
Vladimir Panić orcid id orcid.org/0000-0002-8358-7956 ; Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, RS-11000 Belgrade, Serbia
Branislav Nikolić ; Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, RS-11000 Belgrade, Serbia


Puni tekst: engleski pdf 2.005 Kb

str. 251-258

preuzimanja: 815

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Sažetak

TiO2 powder was synthesized by a forced hydrolysis process and used for the synthesis of Pt/TiO2 composite that is to be foreseen as an advanced electrode material. Pt was incorporated into the synthesized TiO2 from a Pt colloidal dispersion as a precursor prepared by a microwave-assisted polyol process. Physicochemical properties of TiO2 and TiO2-supported Pt were investigated by scanning electron microscopy, dynamic light scattering and X-ray spectroscopy and diffraction techniques. The properties of Pt/TiO2 composite are correlated to the basic voltammetric response of its thin-layer form. It was found that subsequent thermal treatment of synthesized TiO2, which caused crystallization into mainly rutile phase, is required for appropriate Pt incorporation. Although being appropriately loaded by Pt, and the voltammetric response is typical for Pt-based material, the voltammetry of Pt/TiO2 corresponded to much lower loadings. The possibility for Pt particles to be trapped inside TiO2 agglomerates is indicated. The catalyst usage from the synthesized Pt/TiO2 was found quite moderate due to this trapping.

This work is licensed under a Creative Commons Attribution 4.0 International License.

Ključne riječi

titania, platinum as electrocatalyst, particle size distribution, hydrothermal synthesis, catalyst support

Hrčak ID:

185681

URI

https://hrcak.srce.hr/185681

Posjeta: 1.135 *