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Neutral red as electron transfer mediator: enhanced electrocatalytic activity of platinum catalyst for methanol electro-oxidation

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Abstract

Organic molecule neutral red (NR), as electron transfer mediator, was introduced in the anodic electrocatalyst system for methanol oxidation and the resulting electrode was investigated by cyclic voltammetry, polarization method, and electrochemical impedance spectroscopy. For the same loading mass of platinum catalyst, 1.25 times larger exchange current density, 1.83 times higher specific activity, and better long-term cycle stability can be obtained at Pt/NR/graphite electrode, as compared to the electrode without NR. These results indicate that neutral red plays an important role on the enhanced electrocatalytic activity of platinum catalyst for methanol oxidation.

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Acknowledgements

This work is supported by the Program for New Century Excellent Talents in University (NCET-04-0765), Natural Science Foundation of China (50172014), and Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry (2001-498).

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Authors and Affiliations

  1. State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, People’s Republic of China

    Xinxian Zhong, Jinhua Chen, Bo Liu, Yan Xu & Yafei Kuang

  2. College of Chemistry and Chemical Engineering, Guangxi Normal University, Guilin, 541004, People’s Republic of China

    Xinxian Zhong

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  1. Xinxian Zhong
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  2. Jinhua Chen
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  3. Bo Liu
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  4. Yan Xu
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Correspondence to Jinhua Chen.

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Zhong, X., Chen, J., Liu, B. et al. Neutral red as electron transfer mediator: enhanced electrocatalytic activity of platinum catalyst for methanol electro-oxidation. J Solid State Electrochem 11, 463–468 (2007). https://doi.org/10.1007/s10008-006-0174-3

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  • DOI: https://doi.org/10.1007/s10008-006-0174-3

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