Acta Phys. -Chim. Sin. ›› 1996, Vol. 12 ›› Issue (02): 141-145.doi: 10.3866/PKU.WHXB19960210

• ARTICLE • Previous Articles     Next Articles

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

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)