中华医学超声杂志

应用化学 ›› 2009, Vol. 26 ›› Issue (12): 1476-1479.

• 研究论文 • 上一篇    下一篇

磷钨酸对甲酸在碳载Pt催化剂上电氧化的促进作用

杨改秀1,邓玲娟2,唐亚文1,陆天虹1*   

  1. (1.江苏省生物功能材料重点实验室，南京师范大学化学与环境科学学院 南京 210097；
    2.咸阳市咸阳师范学院化学系 咸阳)
  • 收稿日期:2008-12-23 修回日期:2009-06-01 出版日期:2009-12-10 发布日期:2009-12-10
  • 通讯作者: 陆天虹，男，研究员,博士生导师; E-mail:tianhonglu@263.net; 研究方向：燃料电池
  • 基金资助:
    科技部”八六三”计划项目(2007AA05Z143,2007AA05Z159)国家自然科学基金(20703043,20873065)资助项目

Promote Action of Phosphotungstic acid on Electrooxidation of Fomic Acid at Carbon Supported Pt Catalyst

YANG Gai-Xiu1, DENG Ling-Juan2, TANG Ya-Wen1, LIU Tian-Hong1*   

  1. (1.Jiangsu Key Laboratory of Biofunctional Materials，School of Chemistry and
    Environmental Science,Nanjing Normal University,Nanjing 210097;
    2.Department of Chemistry,Xianyang Normal University,Xianyang)
  • Received:2008-12-23 Revised:2009-06-01 Published:2009-12-10 Online:2009-12-10

PDF

1151

被引次数

2

摘要：

用X射线能谱(EDS)、X射线衍射(XRD)和电化学等测试技术研究了电解液中的磷钨酸(PWA)对甲酸在碳载Pt(Pt/C)催化剂电极上氧化的促进作用。 结果表明，PWA不但能提高甲酸在Pt/C催化剂电极上氧化的电催化活性，而且也能提高其电催化稳定性。 这种促进作用与电解液中PWA的浓度有关,当电解液中PWA的质量浓度为0.10 g/L时，这种促进作用最佳。 这主要是由于电解液中PWA质量浓度＞0.10 g/L时，吸附到电极表面的PWA的量太多，占据了Pt/C催化剂电极中Pt表面的部分活性位点，从而降低了催化剂的电催化性能。

关键词: 直接甲酸燃料电池, 炭载铂催化剂, 磷钨酸, 促进作用

Abstract:

The promoting action of phosphotungstic acid(PWA) in the electrolyte on the oxidation of formic acid at the carbon supported Pt(Pt/C) catalyst was investigated via EDS, XRD and electrochemical methods. It was found that PWA can increase not only the electrocatalytic activity of the Pt/C catalyst electrode for the oxidation of formic acid, but also the electrocatalytic stability. The promoting action is related to the PWA concentration. When the PWA concentration is 0.10 g/L, the promoting action is the best.  This is mainly because when the PWA concentration is too high, overfull adsorbed PWA would partially cover the active points of the Pt/C catalyst, leading to the decrease in the electrocatalytic performance of the Pt/C catalyst.

Key words: direct formic acid fuel cell,carbon supported Pt catalyst,phosphotungstic acid,promoting action

中图分类号: 

网站版权 © 应用化学     本网站备案：吉ICP备12000082号