Nanostructured Platinum Catalyst Supported by Titanium Dioxide
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One of important problems associated with the use of Pt/C electrocatalysts in low-temperature fuel cells is their degradation due to oxidation of the carbon support. The use of noncarbon supports resistant to oxidation, for example, oxides of certain metals in the highest degree of oxidation is a promising direction. TiO2 with the high specific surface area (104 m2/g) is synthesized and used in fabrication of supported platinum catalysts. For Pt/TiO2 and carbon-containing composite Pt/TiO2+C, the electrochemically active surface area of platinum and the their activity in oxygen electroreduction reaction are estimated. The assessed stability of synthesized materials far exceeds the stability of commercial Pt/C catalysts.
Keywords:titanium(IV) oxide platinum nanoparticles electrocatalyst oxygen electroreduction reaction noncarbon support
We are grateful to A.Yu. Nikulin for his help with XRD measurements, V.A. Butova (International Research Center “Smart Materials” of the Southern Federal University) for carrying out the BET experiments, S.V. Belenov and N.M. Novikovskii (Research Institute of Physics, Southern Federal University) for their help in carrying out X-ray fluorescence analysis, and also to the Center of Collective Use “Modern Microscopy” at the Southern Federal University for the possibility of studying the microstructure of our samples.
This study was supported by the Russian Scientific Foundation (RSF), grant no. 16-19-10115.
CONFLICT OF INTERESTS
The authors state the absence of any conflict of interests.
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