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Citation: GUO Qi, LI Huanzhi, JI Yun, LU Tianhong. Effect of Sodium Trioxovanadate on Electrocatalytic Performance of Carbon Supported Pd Catalyst for Formic Acid Oxidation[J]. Chinese Journal of Applied Chemistry, ;2013, 30(2): 191-195. doi: DOI:10.3724/SP.J.1095.2013.20082 shu

Effect of Sodium Trioxovanadate on Electrocatalytic Performance of Carbon Supported Pd Catalyst for Formic Acid Oxidation

GUO Qi ^a ,
LI Huanzhi ^b ,
JI Yun ^b ,
LU Tianhong ^b,,

1.
a School of Life Science and Chemistry, Jiangsu Institute of Education, Nanjing 210013, China;
2.
b Jiangsu Key Laboratory of New Power Batteries, School of Chemistry and Material Science, Nanjing Normal University, Nanjing 210097, China

Corresponding author: LU Tianhong,
Received Date: 7 March 2012
Available Online: 8 May 2012
Fund Project: 科技部973项目(2012CB215500) (2012CB215500)国家自然科学基金资助项目(21073094) (21073094)

The poor electrocatalytic stability of the carbon-supported palladium(Pd/C) catalyst for formic acid oxidation and the catalytic performance of the Pd/C catalyst for the decomposition of formic acid are the two problems of the direct formic acid fuel cell(DFAFC).It was found from the investigation that after the Pd/C catalyst is dipped in NaVO₃ solution,VO₃^- can be adsorbed on the Pd/C catalyst.After the Pd/C catalyst is adsorbed with VO₃^-,the catalytic performance of the Pd/C catalyst for the decomposition of formic acid would be significantly inhibited,and the amount of CO produced from the decomposition of formic acid would be reduced,with the poison probability of the Pd/C catalyst by CO significantly reduced.Consequently,the peak current density at the Pd/C catalyst after dipping in NaVO₃ solution for formic acid oxidation is 13% higher than that at the Pd/C catalyst without dipping in NaVO₃ solution.The measurements of chronoamperometric curves indicate that the peak current density for formic acid oxidation at Pd/C catalyst after dipping in NaVO₃ solution for 6000 s is 42% higher than that at the Pd/C catalyst without dipping in NaVO₃ solution.The results demonstrate that dipping in NaVO₃ solution can improve the electrocatalytic ability of Pd/C toward oxidation of formic acid,especially the electrocatalytic stability.
- carbon-supported palladium,
- sodium trioxovanadate,
- formic acid oxidation,
- decomposition of formic acid,
- direct formic acid fuel cell
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