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Issue 22, 2016
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Ruthenium and ruthenium oxide nanofiber supports for enhanced activity of platinum electrocatalysts in the methanol oxidation reaction

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Abstract

Novel supports for the dispersion of Pt electrocatalysts in fuel cells are constantly being developed in order to improve the electrochemical performance and reduce the cost. The electrocatalytic activity and stability in fuel cells largely depend on the surface morphology and structure of the support. In this study, Ru and RuO2 nanofibers prepared by electrospinning and post-calcination have been considered as Pt-catalyst supports. The composite material loaded with 20 wt% Pt catalyst exhibited a high anodic current density of 641.7 mA mgPt−1, a high IF/IB ratio of 1.9, and excellent electrocatalytic stability compared to commercial Pt/C. The improved anodic current density of the composite is attributed to the high dispersion of the Pt catalyst over the large surface area of the nanosized support grains, while its low onset potential, high IF/IB ratio, and excellent electrocatalytic stability are ascribed to a bifunctional effect resulting from the existence of Ru atoms on the support surface. Finally, the efficient electron transfer and a rapid diffusion rate of the electrolyte are due to the unique network structure of the supports. Thus, the Ru and RuO2 nanofiber composites act as promising Pt-catalyst supports for the methanol oxidation reaction.

Graphical abstract: Ruthenium and ruthenium oxide nanofiber supports for enhanced activity of platinum electrocatalysts in the methanol oxidation reaction

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Publication details

The article was received on 24 Mar 2016, accepted on 02 May 2016 and first published on 03 May 2016


Article type: Paper
DOI: 10.1039/C6CP01964A
Citation: Phys. Chem. Chem. Phys., 2016,18, 14859-14866
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    Ruthenium and ruthenium oxide nanofiber supports for enhanced activity of platinum electrocatalysts in the methanol oxidation reaction

    G. An, E. Lee and H. Ahn, Phys. Chem. Chem. Phys., 2016, 18, 14859
    DOI: 10.1039/C6CP01964A

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