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Preparation and Activity of Nb2O5·nH2O-PtRu/C for Methanol Oxidation

  • Li Weiwei ,
  • Zhang Xiangjun ,
  • Lu Shigang
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  • a. R&D Centre for Vehicle Battery and Energy Storage, General Research Institute for Nonferrous Metals, Beijing 100088;
    b. College of Chemistry and Chemical Engineering of Xinxiang University, Xinxiang 453000, Henan

Received date: 2011-09-28

  Revised date: 2011-12-17

  Online published: 2012-01-14

Supported by

Project supported by the National High Technology Research and Development Program (No. 2007AA03Z245).

Abstract

10%Nb2O5·nH2O-20%Pt10%Ru/C electro-catalyst for methanol oxidation was prepared by deposition method, followed with heat treatment in Ar atmosphere. The effect of heat treatment on morphology, structure and electrochemistry performance of the product was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), cyclic voltammetry and chronoamperograms. No diffraction peaks of Ru were observed in the XRD patterns, while all the peaks of Pt were in accordance with the face centered cubic crystal structure. The binding energy of Pt was not affected by Nb2O5·nH2O. Compared with 20%Pt10%Ru/C, in 10%Nb2O5·nH2O-20%Pt10%Ru/C samples, the activated particles were uniformly dispersed, and the performances of methanol oxidation and resistance to “CO” were better. The results indicated that the introduction of Nb2O5·nH2O inhibited the growth of active particles, and decreased the alloying degree of Pt-Ru during heat treatment. Besides, Nb2O5·nH2O also provided active “-OH” and improved H+ transfer, leading to easier adsorption-desorption of methanol and its oxidation intermediates.

Cite this article

Li Weiwei , Zhang Xiangjun , Lu Shigang . Preparation and Activity of Nb2O5·nH2O-PtRu/C for Methanol Oxidation[J]. Acta Chimica Sinica, 2012 , 70(9) : 1073 -1080 . DOI: 10.6023/A1103286

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