Electrodeposition of platinum on tourmaline and application as an electrocatalyst for oxidation of methanol |
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| Authors: | Jin-Hong Li Li-Zhen Fan and Li-Bing Liao |
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| Institution: | (1) Beijing Key Laboratory of Water Resource and Engineering, School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, China;(2) School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China; |
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| Abstract: | A composite electrode of Pt nanoparticles coupled with tourmaline is prepared on glassy carbon (GC) disk electrode via electrodeposition.
The nanocomposite of Pt/tourmaline is characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray
powder diffraction, and transmission electron microscopy examinations linked with energy dispersive X-ray analysis. The electrocatalytic
performance of the composite electrode (Pt/tourmaline/GC) is investigated in electrocatalysis oxidation of methanol at room
temperature by cyclic voltammetry and chronoamperometry. It is indicated that Pt nanoparticles with size of ∼5 nm are uniformly
assembled along the tourmaline particles and Pt exists in metallic and oxidated states confirmed by XPS. The results of electro-oxidation
of methanol show that Pt/tourmaline catalyst is catalytically more active and stable than platinum-modified GC electrode,
and the onset potential of Pt/tourmaline shifts 0.15 V to the negative side, and also the current density is significantly
enhanced. |
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