物理化学学报 >> 1996, Vol. 12 >> Issue (02): 141-145.doi: 10.3866/PKU.WHXB19960210

研究论文 上一篇    下一篇

旋转环盘电极研究氧在PolyCoPP膜上的点催化还原

肖少荣,王颖,王宝忱   

  1. 广西师范学院化学系,南宁 530001|中国科学院长春应用化学研究所 长春 130022
  • 收稿日期:1995-05-22 修回日期:1995-09-07 发布日期:1996-02-15
  • 通讯作者: 肖少荣

Studies of Oxygen Reduction on Polycobaltprotoporphyrin Film with RRDE

Xiao Shao-Rong,Wang Ying,Wang Bao-Chen   

  1. Chemistry Department,Guangxi Teachers College,Nanning 530001|Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022
  • Received:1995-05-22 Revised:1995-09-07 Published:1996-02-15
  • Contact: Xiao Shao-Rong

摘要:

用旋转环(Au)-盘(热解石墨,PG)电极研究了氧在聚钴原卟啉二甲酯膜(PolyCoPP)上的电催化还原.实验发现在0.1mol•L-1NaOH,O2饱和的溶液中,当盘电位在低极化区时,氧的还原主要是二电子还原过程,HO2-为主要产物,不会再进一步还原为OH-;而在高极化区时,氧既有四电子的直接还原,也有HO2-的进一步还原.

关键词: 聚钴原卟啉二甲酯膜(PolyCoPP), 氧气, 旋转环盘电极

Abstract:

The mechanism of oxygen reduction on polycobaltprotoporphyrin IX dimethyl ester (PolyCoPP) film has been studied by using the rotating ring(Au)-disk(pyrolytic graphite, PG) electrode (RRDE) technique. The PolyCoPP/PG electrode promotes the oxygen reduction via two-electron process which produces peroxide as a main product in O2-saturated 0.1 mol•dm-3 NaOH. Once HO2- has been formed, no further reduction to OH- takes place at the disk. When the disk potential shifts to more negative, either the direct reduction of O2 to OH- or the further reduction of HO2- to OH- occurs.

Key words: Polycobaltprotoporphyrin IX dimethyl ester(PolyCoPP), Oxygen, Rotating ring-disk electrode(RRDE)