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 • 上一篇下一篇

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

吴锋¹,吴川²,刘延红³

1.
2. 北京理工大学化工与环境学院
3. 北京理工大学

收稿日期:2009-06-30 修回日期:2009-11-19 出版日期:2010-08-28 发布日期:2010-08-23
通讯作者: 吴川
基金资助:
国家重点基础研究发展计划资助项目;北京市优秀人才培养资助项目

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)

摘要/Abstract

摘要：

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 effects of alkalizing agent, pH and temperature were investigated by TEM and CV. The composition and structure of Pt/C catalyst prepared at optimal conditions of 140℃ and pH=6.7 adjusted by Na3Cit was further characterized by XPS and 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.

关键词: Platinum, Nanocatalyst, Ethylene glycol method, Fuel cell

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

吴锋吴川刘延红. Preparation of Pt/C Nanocatalysts by Ethylene Glycol Method in Weakly Acidic Solutions[J]. J. Mater. Sci. Technol., 2010, 26(8): 705-710.

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.

参考文献

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

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

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