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Phosphomolybdic acid modified PtRu nanocatalysts for methanol electro-oxidation

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Abstract

Phosphomolybdic acid (H3PMo12O40, PMo12) was employed to modify PtRu nanocatalysts for methanol electro-oxidation. The results show that the performance of PtRu catalysts was improved by the formation of the negatively charged self-assembled PMo12 monolayer on the catalyst surface. Electrochemical measurements indicate that the PMo12-modified PtRu catalyst has a higher catalytic activity and a better poison tolerance than the unmodified one. It is also found that the sequence in which PtRu and PMo12 were deposited onto the carbon support during the preparation process has a major influence on the performance of PMo12-modified PtRu nanocatalysts. X-ray photoelectron spectra results show that the self-assembled PMo12 layer inhibits the formation of metal oxides/hydroxides on the surface of PtRu nanoparticles to some extent.

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Acknowledgments

This study was financially supported by the National Natural Science Foundation of China (Grant No. 21273152 and 51004072).

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Authors and Affiliations

  1. School of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang, 110159, China

    Weimin Chen, Xufang Wei & Yu Zhang

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  1. Weimin Chen
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  2. Xufang Wei
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  3. Yu Zhang
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Correspondence to Weimin Chen.

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Chen, W., Wei, X. & Zhang, Y. Phosphomolybdic acid modified PtRu nanocatalysts for methanol electro-oxidation. J Appl Electrochem 43, 575–582 (2013). https://doi.org/10.1007/s10800-013-0545-2

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  • DOI: https://doi.org/10.1007/s10800-013-0545-2

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