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Ultralow platinum-loading PtPdRu@PtRuIr/C catalyst with excellent CO tolerance and high performance for the methanol oxidation reaction

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Abstract

Carbon-supported PtPdRuIr, Pd@PtRuIr, PtPd@PtRuIr, and PtPdRu@PtRuIr catalysts were prepared by a colloidal method and their catalytic activities to the methanol oxidation reaction in the acidic media were extensively investigated at room temperature. The catalysts were characterized by transmission electron microscopy and X-ray diffraction techniques, and their electrochemical behavior was evaluated by the cyclic voltammetry. The PtPdRu@PtRuIr/C catalyst is found to yield much higher electrocatalytic activity than the other ones and the commercial catalyst. For example, the Pt metal mass-specific activity of this PtPdRu@PtRuIr/C (Pt content 10 wt%, 1.7 mA·cm−2·mg−1) electrocatalyst is ~3-fold higher than that of the commercial JM 40 % Pt/C (0.6 mA·cm−2·mg−1) electrocatalysts, and the If/Ib ratio of PtPdRu@PtRuIr/C is 1.6, which is higher than that of the JM 40 % Pt/C (0.9). The improvement may result from the high dispersion of the active metal catalyst and the synergistic effect between the PtRuIr and PtPdRu layers. It is thus concluded that the pseudo-core–shell structure could significantly improve the methanol electro-oxidation activity and CO tolerance of the electrocatalyst.

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Acknowledgments

This work was financially supported by the National Natural Scientific Foundation of China (Nos. 20673040 and 20876062), the Guangdong Provincial Scientific Foundation (Nos. 36055 and S2012040007383), and the Key Laboratory of Fuel Cell Technology of Guangdong Province (No. 201112).

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Zhaoqing University, Zhaoqing, 526061, China

    Yan-Ni Wu, Hai-Fu Guo & Xiang-Ying Hao

  2. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China

    Shi-Jun Liao & Zhen-Xing Liang

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  1. Yan-Ni Wu
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  2. Shi-Jun Liao
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  3. Hai-Fu Guo
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  4. Xiang-Ying Hao
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  5. Zhen-Xing Liang
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Correspondence to Yan-Ni Wu.

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Wu, YN., Liao, SJ., Guo, HF. et al. Ultralow platinum-loading PtPdRu@PtRuIr/C catalyst with excellent CO tolerance and high performance for the methanol oxidation reaction. Rare Met. 33, 337–342 (2014). https://doi.org/10.1007/s12598-013-0063-8

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  • DOI: https://doi.org/10.1007/s12598-013-0063-8

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