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Architecture of PtFe/C catalyst with high activity and durability for oxygen reduction reaction

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Abstract

A PtFe/C catalyst has been synthesized by impregnation and high-temperature reduction followed by acid-leaching. X-ray diffraction, X-ray photoelectron spectroscopy and X-ray atomic near edge spectroscopy characterization reveal that Pt3Fe alloy formation occurs during high-temperature reduction and that unstable Fe species are dissolved into acid solution. The difference in Fe concentration from the core region to the surface and strong O-Fe bonding may drive the outward diffusion of Fe to the highly corrugated Pt-skeleton, and the resulting highly dispersed surface FeO x is stable in acidic medium, leading to the construction of a Pt3Fe@Pt-FeO x architecture. The as prepared PtFe/C catalyst demonstrates a higher activity and comparable durability for the oxygen reduction reaction compared with a Pt/C catalyst, which might be due to the synergetic effect of surface and subsurface Fe species in the PtFe/C catalyst.

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Authors and Affiliations

  1. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China

    Jiayuan Li, Guoxiong Wang, Jing Wang, Mingming Wei, Fan Yang, Liang Yu & Xinhe Bao

  2. University of Chinese Academy of Sciences, Beijing, 100039, China

    Jiayuan Li, Jing Wang & Mingming Wei

  3. Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China

    Shu Miao & Xinhe Bao

Authors
  1. Jiayuan Li
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  2. Guoxiong Wang
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  3. Jing Wang
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  4. Shu Miao
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  5. Mingming Wei
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  6. Fan Yang
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  7. Liang Yu
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  8. Xinhe Bao
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Correspondence to Guoxiong Wang or Xinhe Bao.

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Li, J., Wang, G., Wang, J. et al. Architecture of PtFe/C catalyst with high activity and durability for oxygen reduction reaction. Nano Res. 7, 1519–1527 (2014). https://doi.org/10.1007/s12274-014-0513-0

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  • DOI: https://doi.org/10.1007/s12274-014-0513-0

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