Pdn-Fe纳米合金作为Mg-H2O2半燃料电池阴极研究

doi:10.15541/jim20170142

Journal of Inorganic Materials ›› 2018, Vol. 33 ›› Issue (1): 81-86.doi: 10.15541/jim20170142

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Cathode Performance of Mg-H₂O₂ Semi-fuel Cell with Pd_n-Fe Alloy as Cathode

Li-Mei SUN(), Le-Le SHI, Shuai-Shuai ZHANG, Yi-Jia ZHANG, Zeng-Hui LI, Wurigamula HE

College of Chemistry and Chemical Engineering, Inner Mongolia Key Laboratory of Carbon Nanonoterial, Inner Mongolia University for the Nationalities, Tongliao 028000, China

Received:2017-03-29 Revised:2017-06-07 Online:2018-01-23 Published:2017-12-15
Supported by:
National Natural Science Foundation of China (21003070,21463017);Natural Science Foundation of Inner Mongolia(2012MS0208)

Abstract

Abstract:

Carbon-supported palladium-iron composite electrocatalysts with different Pd to Fe atom ratios (2 : 1, 4 : 1, 8 : 1) were prepared by a chemical reduction method. The morphology and surface state of the Pd_n-Fe/C and Pd/C electrocatalysts were characterized by X-ray diffractionanalysis (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The results indicated that Fe was added to the Pd/C catalyst and reacted with Pd to form Pd_n-Fe alloy, with slightly varied particle size. And the Pd_n-Fe catalyst particles were homogeneously distributed on the surface of the C carrier with the average particle size between 2-3 nm. The addition of Fe influenced crystal lattice structure of Pd/C catalysts. Electrochemical (CV, LSV, CA) data showed that the eletrocatalytic activity of the Pd₄-Fe/C electrocatalyst for hydrogen peroxide electroreduction was much higher than that of Pd/C. The current density of Pd/C electrode for hydrogen peroxide electroreduction reaction was 17.71 mA/cm² when E = 0.2 V and the current density of Pd₄-Fe/C electrode was up to 19.42 mA/cm². The Mg-H₂O₂ semi-fuel cell performance text showed that both the open circuit potential of the two fuel cells were about 1.8 V, of which the power density of Mg-H₂O₂semi-fuel cell using Pd_n-Fe/C as the cathode was higher 41 mW/cm² than that using Pd/C as cathode.

Key words: Fe, Pd/C, Hydrogen peroxide electroreduction, Mg-H2O2 semi-fuel cell

CLC Number:

TQ174

Li-Mei SUN, Le-Le SHI, Shuai-Shuai ZHANG, Yi-Jia ZHANG, Zeng-Hui LI, Wurigamula HE. Cathode Performance of Mg-H₂O₂ Semi-fuel Cell with Pd_n-Fe Alloy as Cathode[J].Journal of Inorganic Materials, 2018, 33(1): 81-86.

Figures/Tables 7

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References 29

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Cathode Performance of Mg-H₂O₂ Semi-fuel Cell with Pd_n-Fe Alloy as Cathode

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