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Promotion of catalytic activity for methanol electro-oxidation on CoPc-Pt/C co-catalysts

  • Articles/Physical Chemistry
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Chinese Science Bulletin

Abstract

The catalytic activity for methanol electro-oxidation on CoPc-Pt/C co-catalysts, prepared by impregnation method, was studied in details through electrochemical methods. Cyclic voltammetry (CV) result demonstrates that CoPc has higher forward anodic peak current density and j f /j b value (forward anodic peak current density/backward anodic peak current density) than Pt/C. Chronoamperometry (CA) analysis indicates that CoPc-Pt/C exhibits both excellent transient current density and stable current density for methanol electro-oxidation compared with Pt/C. Two main mechanisms related to the promotion of catalytic activity are as follows: CoPc-Pt/C has the activity of tolerance to carbonaceous intermediates, thus inhibiting the self-poisoning of catalysts; CoPc-Pt/C owns prominent intrinsic catalytic activity indicated by the apparent activation energy for methanol oxidation on CoPc-Pt/C, which is 18 kJ/mol, less than that on Pt and PtRu catalysts as reported.

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Authors and Affiliations

  1. State Key Laboratory of Advanced Technology for Materials Synthesis and Progressing, Wuhan University of Technology, Wuhan, 430070, China

    **gJie Wu, YiMin Xu, Mu Pan, WenTao Ma & HaoLin Tang

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  1. **gJie Wu
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  2. YiMin Xu
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  3. Mu Pan
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  4. WenTao Ma
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  5. HaoLin Tang
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Correspondence to Mu Pan.

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Supported by the National Natural Science Foundation of China (Grant No. 20576106)

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Wu, J., Xu, Y., Pan, M. et al. Promotion of catalytic activity for methanol electro-oxidation on CoPc-Pt/C co-catalysts. Chin. Sci. Bull. 54, 1032–1036 (2009). https://doi.org/10.1007/s11434-009-0108-4

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  • DOI: https://doi.org/10.1007/s11434-009-0108-4

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