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Research Papers

The Impregnating Reduction Method for Synthesis of Pt–Ru Nanoparticles and Its Catalytic Performance for Methanol Electro-oxidation

[+] Author and Article Information
Long-long Wang

College of Environmental and
Chemical Engineering,
Shanghai University of Electric Power,
Shanghai 200090, China
e-mail: jiangnankobe@126.com

Hong-min Mao

Wuhan Product Quality Supervision and
Inspection Institute,
Wuhan 430043, Hubei, China
e-mail: hongminmao@163.com

Xiao-jin Zhou

College of Environmental and
Chemical Engineering,
Shanghai University of Electric Power,
Shanghai 200090, China
e-mail: zhouxiaojin2004@163.com

Qun-jie Xu

Professor
College of Environmental and
Chemical Engineering,
Shanghai University of Electric Power,
Shanghai 200090, China
e-mail: xuqunjie@shiep.edu.cn

Qiao-xia Li

Associate Professor
College of Environmental and
Chemical Engineering,
Shanghai University of Electric Power,
Shanghai 200090, China
e-mail: liqiaoxia@shiep.edu.cn

1Corresponding author.

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF FUEL CELL SCIENCE AND TECHNOLOGY. Manuscript received May 15, 2013; final manuscript received December 21, 2014; published online March 31, 2015. Editor: Nigel M. Sammes.

J. Fuel Cell Sci. Technol 12(4), 041001 (Aug 01, 2015) (4 pages) Paper No: FC-13-1051; doi: 10.1115/1.4029874 History: Received May 15, 2013; Revised December 21, 2014; Online March 31, 2015

Well-dispersed and low Pt content Pt–Ru/C nanoparticles were prepared by a developed impregnating reduction method with sodium citrate as stabilizer. The as-prepared Pt–Ru/C catalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and energy dispersive X-ray (EDX) analysis. TEM showed that the Pt–Ru particles were quite uniformly distributed on the surface of the carbon with an average particle size of 3.5–4.5 nm. The effect of pH values on methanol electro-oxidation reaction was examined by cyclic voltammetry (CV) and chronoamperometry (CA). Pre-adsorbed CO monolayer stripping was used to evaluate the antipoisoning ability. The results showed that Pt–Ru/C (pH = 8) catalyst had the highest catalytic activity and stability toward the oxidation of methanol. Finally, comparing Pt–Ru/C (Pt–Ru 20 wt.%, Pt/Ru = 1:1) catalysts with Pt/C (Pt 20 wt.%), the onset potential was 200 mV lower and electrochemical active area was much bigger.

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Figures

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Fig. 1

TEM images of Pt–Ru/C catalyst

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Fig. 2

EDX spectra of Pt–Ru/C catalyst

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Fig. 3

XRD patterns of (a) Pt/C and (b) Pt–Ru/C catalysts

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Fig. 4

Cyclic voltammograms of methanol electro-oxidation on Pt–Ru/C electrode in 0.1 mol/L HClO4 + 0.5 mol/L CH3OH solution

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Fig. 5

CA curves of Pt–Ru/C in 0.1 mol/L HClO4 + 0.5 mol/L CH3OH solution

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Fig. 6

CO striping voltammetric curves of Pt/C and Pt–Ru/C in 0.1 mol/L HClO4

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