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KMID : 0385520130260010042
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Analytical Science & Technology
2013 Volume.26 No. 1 p.42 ~ p.50
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Electrocatalytic activity of the bimetallic Pt-Ru catalysts doped TiO2-hollow sphere nanocomposites
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Lee In-Ho
Kwen Hai-Doo
Choi Seong-Ho
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Abstract
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This paper describes the electrocatalytic activity for the oxidation of small biomolecules on the surface of Pt-Ru nanoparticles supported by TiO2-hollow sphere prepared for use in sensor applications or fuel cells. The TiO2-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 Pt4+ and Ru3+ ions onto TiO2-hollow sphere (Pt-Ru@TiO2-H). The prepared Pt-Ru@TiO2- 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@TiO2-H nanocomposites showed high electrocatalytic activity for the oxidation of biomolecules. As a result, the prepared Pt-Ru catalysts doped onto TiO2-H sphere nanocomposites supports can be used for non-enzymatic biosensor or fuel cell anode electrode.
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KEYWORD
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Electrocatalytic oxidation, Pt-Ru nanocomposites, TiO2-Hollow nanocomposites, Poly(styrene-covinylphenylboronic acid)
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