CJCU

Chem. J. Chinese Universities ›› 2011, Vol. 32 ›› Issue (11): 2626.

• Articles • Previous Articles     Next Articles

Stability of Carbon Supported Pd/C Catalyst in Direct Formic Acid Fuel Cell

SHEN Juan-Zhang1, CHEN Ying2, YANG Gai-Xiu3, TANG Ya-Wen1, LU Tian-Hong1,4*   

  1. 1. Jiangsu  Key  Laboratory of  New Power Batteries, Jiangsu  Key  Laboratory of Biofunctional Materials, School of Chemistry and Environment  Science, Nanjing Normal University, Nanjing 210097, China;
    2. School of Mechanical and Metallurgical Engineering, Jiangsu University of Science and Technology, Zhangjiagang 215600, China;
    3. Key Laboratory of Renewable Energy and Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Siences,  Guangzhou 510640, China;
    4. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  • Received:2010-12-30 Revised:2011-03-18 Online:2011-11-10 Published:2011-10-14
  • Contact: LU Tian-Hong E-mail:tianhonglu@263.net
  • Supported by:

    国家自然科学基金(批准号: 20873065, 21073094)资助.

PDF (PC)

Cited

5

Abstract: In order to understand the reason for the poor electrocatalytic stability of the Pd/C catalyst for formic acid oxidation, the changes in the structure and the electrocatalytic performance of the Pd/C catalyst after dipping in the formic acid solution for a certain time were investigated using X-ray diffraction spectroscopy and electrochemical methods. It is found that the relative crystallinity of the Pd particles of Pd/C catalyst increases from 1.73 to 3.34 and the average size decreases from 4.4 nm to 1.8 nm  after dipping in formic acid solution for 15 d. The electrocatalytic activity and stability of the Pd/C catalyst for formic acid oxidation decrease. The peak current density of formic acid oxidation decreases  from 9.3 mA/cm2 to 6.7 mA/cm2. It may be due to the certain dissolution of Pd in the Pd/C catalyst and the catalytic decomposition of formic acid at the Pd/C catalyst. This result may supply a new approach for exploring the reason for the poor electrocatalytic stability of the Pd/C catalyst for the formic acid oxidation.

Key words: Carbon supported Pd catalyst, Formic acid oxidation, Formic acid decomposition, Dipping in formic acid; , Direct formic acid fuel cell

CLC Number: 

TrendMD: