Improvement of electrocatalytic performance of carbon supported Pd anodic catalyst in direct formic acid fuel cell by ethylenediamine-tetramethylene phosphonic acid
- 作者：Liang Lu ; Huanzhi Li ; Yujie Hong ; Yafen Luo ; Yawen Tang ; Tianhong Lu ; tianhonglu@263.net ; tianhonglu_1999@yahoo.com
- 关键词：Ethylenediamine-tetramethylene phosphonic acid ; Formic acid ; Direct formic acid fuel cell ; Carbon supported Pd catalyst
- 刊名：Journal of Power Sources
- 出版年：2012
- 期刊代码：58_03787753
- 类别：ce
- 出版时间：15 July, 2012
- 卷：210
- 期：Complete
- 页码：154-157
- 文件大小：406 K
摘要
The direct formic acid fuel cell (DFAFC) has two major shortcomings that limit its lifespan and performance: (i) the poor electrocatalytic stability of the carbon supported Pd (Pd/C) catalyst for the oxidation of formic acid and (ii) rapid decomposition of formic acid over the Pd/C catalyst. To solve the problems, the Pd/C catalyst is modified with ethylenediamine-tetramethylene phosphonic acid (EDTMP). The resulting catalyst is designated as Pd/C-E catalyst. It is found that the Pd/C-E catalyst can inhibit the decomposition of formic acid and promote the oxidation of formic acid through the direct pathway. Consistently, the Pd/C-E catalyst is significantly protected from CO poisoning. As compared to the Pd/C catalyst, the electrocatalytic performance of the Pd/C-E catalyst is significantly superior. These results provide the first proof of the concept that DFAFC can be significantly improved by Pd/C-E catalyst.