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Pt–Ru nanoparticles supported PAMAM dendrimer functionalized carbon nanofiber composite catalysts and their application to methanol oxidation

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Abstract

Polyamidoamine (PAMAM) dendrimers has been anchored on functionalized carbon nanofibers (CNF) and supported Pt–Ru nanoparticles have been prepared with NaBH4 as a reducing agent. The samples were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy (TEM) analysis. It was shown that Pt–Ru particles with small average size (2.6 nm) were uniformly dispersed on PAMAM/CNF composite support and displayed the characteristic diffraction peaks of Pt face-centered cubic structure. The electrocatalytic activities of the prepared-composites (20% Pt–Ru/PAMAM-CNF) were examined by using cyclic voltammetry for oxidation of methanol. The electrocatalytic activity of the CNF-based composite (20% Pt–Ru/PAMAM-CNF) electrode for methanol oxidation showed better performance than that of commercially available Johnson Mathey 20% Pt–Ru/C catalyst. The results imply that CNF-based PAMAM composite electrodes are excellent potential candidates for application in direct methanol fuel cells.

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  1. Department of Chemistry, School of Science and Humanities, VIT University, Vellore, 632014, India

    T. Maiyalagan

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  1. T. Maiyalagan
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Maiyalagan, T. Pt–Ru nanoparticles supported PAMAM dendrimer functionalized carbon nanofiber composite catalysts and their application to methanol oxidation. J Solid State Electrochem 13, 1561–1566 (2009). https://doi.org/10.1007/s10008-008-0730-0

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  • DOI: https://doi.org/10.1007/s10008-008-0730-0

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