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Research Papers

The Synthesis of High-Dispersed Ni/Pt/C Nano-Electrocatalysts for Oxygen Reduction Reaction

[+] Author and Article Information
Yumei Chen

Department of Chemistry,
Henan Polytechnic University,
Jiaozuo 454000, China
e-mail: chenyumei@hpu.edu.cn

Jianchao Shi

Department of Chemistry,
Henan Polytechnic University,
Jiaozuo 454000, China

1Corresponding author.

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF FUEL CELL SCIENCE AND TECHNOLOGY. Manuscript received October 22, 2012; final manuscript received May 20, 2014; published online December 23, 2014. Assoc. Editor: Jacob Brouwer.

J. Fuel Cell Sci. Technol 12(2), 021005 (Apr 01, 2015) (5 pages) Paper No: FC-12-1109; doi: 10.1115/1.4028149 History: Received October 22, 2012; Revised May 20, 2014; Online December 23, 2014

High-dispersed core–shell Ni/Pt/C nano-electrocatalysts were prepared by “modified polyol process” method. Effect of the experimental parameters, such as the pretreatment of XC-72 supports, the method of adding the XC-72 supports, the concentration of the precursors, on the characteristic and the dispersion of the Ni/Pt nanoparticles on carbon were studied in details. The prepared core–shell Ni/Pt/C catalysts were characterized with X-ray diffraction (XRD), transmission electron microscopy (TEM), and electrochemical methods. The results exhibit that the choice of method of adding the XC-72 support into the solution before formation of the Ni core and appropriately lower concentration of the precursor can obtain high dispersed Ni/Pt/C catalysts, which showed remarkably enhanced activity for oxygen reduction reaction (ORR).

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Figures

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Fig. 1

CVs of the prepared Ni/Pt/C catalysts with carbon after different pretreatment in Ar-saturated 0.5 M H2SO4 at 27 °C. Scanning rates: 50 mV/s.

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Fig. 2

XRD patterns of the Ni/Pt/C catalysts

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Fig. 3

TEM images of Ni/Pt/C catalysts

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Fig. 4

CVs of the Ni/Pt/C catalysts in Ar-saturated 0.5 M H2SO4 at 27 °C with a scan rate 50 mV/s

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Fig. 5

(a) ORR polarization curves for the prepared Ni/Pt/C catalysts and the corresponding and (b) SA and mass activities of Pt with a scan rate of 5 mV/s at 1600 rpm and 27 °C

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