Preparation of Pt/C Nanocatalysts by Ethylene Glycol Method in Weakly Acidic Solutions

J Mater Sci Technol ›› 2010, Vol. 26 ›› Issue (8): 705-710.

• Novel Processing and Characterization Methods • Previous Articles Next Articles

Preparation of Pt/C Nanocatalysts by Ethylene Glycol Method in Weakly Acidic Solutions

Feng Wu^1,2), Yanhong Liu¹⁾, Chuan Wu²⁾

1) School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China
2) National Development Center for High Technology Green Materials, Beijing 100081, China

Received:2009-06-30 Revised:2009-11-19 Online:2010-08-28 Published:2010-08-23
Contact: Chuan Wu
Supported by:
the National Basic Research Program of China (Grant No. 2009CB220100) and the Beijing Excellent Talent Support Program (Grant No. 20071D1600300396)

Abstract

Abstract:

Pt/C catalysts were prepared by ethylene glycol (EG) method in weakly acidic solutions adjusted by sodium citrate (Na₃Cit), sodium acetate (NaAc) and sodium hydroxide (NaOH), separately. The e®ects of alkalizing agent, pH and temperature were investigated by transmission electron microscopy (TEM) and CV. The composition and structure of Pt/C catalyst prepared at optimal conditions of 140°C and pH=6.7 adjusted by Na₃Cit was further characterized by X-ray photoelectron microscopy (XPS) and X-ray diffraction (XRD), respectively. The average particle size of Pt/C catalyst prepared using Na₃Cit is 2.1 nm, smaller than that of Pt/C catalyst (2.9 nm) prepared using NaAc, much smaller than that of Pt/C catalyst (100 nm) prepared using NaOH. The electrocatalytic activity of Pt/C catalysts prepared using Na₃Cit and NaAc for ethanol oxidation are 456.6 and 419.2 mA/mgPt, comparative to those of Pt/C catalyst prepared by typical EG method and commercial E- TEK Pt/C catalyst. Finally, the size control mechanism of Pt nanoparticles was discussed.

Key words: Platinum, Nanocatalyst, Formation mechanism, Fuel Cell

Feng Wu Yanhong Liu Chuan Wu. Preparation of Pt/C Nanocatalysts by Ethylene Glycol Method in Weakly Acidic Solutions[J]. J Mater Sci Technol, 2010, 26(8): 705-710.

References

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Preparation of Pt/C Nanocatalysts by Ethylene Glycol Method in Weakly Acidic Solutions

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