Citation: Xiao Shao-Rong, Wang Ying, Wang Bao-Chen. Studies of Oxygen Reduction on Polycobaltprotoporphyrin Film with RRDE[J]. Acta Physico-Chimica Sinica, 1996, 12(02): 141-145. doi: 10.3866/PKU.WHXB19960210
旋转环盘电极研究氧在PolyCoPP膜上的点催化还原
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．
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关键词:
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聚钴原卟啉二甲酯膜(PolyCoPP)
- / 氧气
- / 旋转环盘电极
English
Studies of Oxygen Reduction on Polycobaltprotoporphyrin Film with RRDE
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.
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