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http://dx.doi.org/10.5806/AST.2013.26.1.042

Electrocatalytic activity of the bimetallic Pt-Ru catalysts doped TiO2-hollow sphere nanocomposites  

Lee, In-Ho (Department of Chemistry, Hannam University)
Kwen, Hai-Doo (Department of Chemistry, Hannam University)
Choi, Seong-Ho (Department of Chemistry, Hannam University)
Publication Information
Analytical Science and Technology / v.26, no.1, 2013 , pp. 42-50 More about this Journal
Abstract
This paper describes the electrocatalytic activity for the oxidation of small biomolecules on the surface of Pt-Ru nanoparticles supported by $TiO_2$-hollow sphere prepared for use in sensor applications or fuel cells. The $TiO_2$-hollow sphere supports were first prepared by sol-gel reaction of titanium tetraisopropoxide with poly(styrene-co-vinylphenylboronic acid), PSB used as a template. Pt-Ru nanoparticles were then deposited by chemical reduction of the $Pt^{4+}$ and $Ru^{3+}$ ions onto $TiO_2$-hollow sphere ($Pt-Ru@TiO_2-H$). The prepared $Pt-Ru@TiO_2-H$ nanocomposites were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), and elemental analysis. The electrocatalytic efficiency of Pt-Ru nanoparticles was evaluated via ethanol, methanol, dopamine, ascorbic acid, formalin, and glucose oxidation. The cyclic voltammograms (CV) obtained during the oxidation studies revealed that the $Pt-Ru@TiO_2-H$ nanocomposites showed high electrocatalytic activity for the oxidation of biomolecules. As a result, the prepared Pt-Ru catalysts doped onto $TiO_2$-H sphere nanocomposites supports can be used for non-enzymatic biosensor or fuel cell anode electrode.
Keywords
Electrocatalytic oxidation; Pt-Ru nanocomposites; $TiO_2$-Hollow nanocomposites; Poly(styrene-co-vinylphenylboronic acid);
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