Catalytic activity and stability toward methanol oxidation of PtRu/CNTs prepared by adsorption in aqueous solution and reduction in ethylene glycol |
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| Authors: | Z H Zhou W S Li P P Guo H Y Yang X D Xiang L Z Zeng Z Fu |
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| Institution: | (1) School of Chemistry and Environment, South China Normal University, Guangzhou, 510006, China;(2) Key Lab of Electrochemical Technology on Energy Storage and Power Generation in Guangdong Universities, Guangzhou, 510006, China; |
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| Abstract: | In this paper, we reported an improved process for the preparation of PtRu/CNTs, which involves the adsorption of Pt and Ru
ions on CNTs in aqueous solution and the reduction of the adsorbed Pt and Ru ions on CNTs in ethylene glycol. The surface
morphology, structure, and compositions of the prepared catalyst were studied by transmission electron microscopy (TEM), X-ray
diffraction (XRD), and energy-dispersive spectrometer. TEM observation showed that the particles size of the prepared PtRu
alloy was in the range of 2–5 nm, XRD patterns confirmed a face-centered cubic crystal structure. The activity and stability
of the prepared catalyst toward methanol oxidation were studied in 0.5 M H2SO4 + 1 M CH3OH solution by cyclic voltammetry, chronoamperometry, and chronopotentiometry. The electrochemical results showed that the
prepared catalyst exhibited higher activity and stability toward methanol oxidation than commercial PtRu/C with the same loading
amount of Pt and Ru. |
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