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Citation: Wu Baozhang, Yang Changtong, Wu Huihuang. Reduction of Oxygen on Glassy Carbon Electrode Modified by Polypyrrole Film with Ferriporphyrin[J]. Chinese Journal of Applied Chemistry, ;1999, 16(5): 17-20. shu

Reduction of Oxygen on Glassy Carbon Electrode Modified by Polypyrrole Film with Ferriporphyrin

1.
Department of Chemistry, State Key Laboratory of Physical Chemistry for Solid Surfaces, Xiamen University, Xiamen 361005

Received Date: 18 January 1999
Available Online: 24 May 1999
Fund Project: 福建省自然科学基金资助项目(B97004) (B97004)

The oxygen electroreduction on the glassy carbon electrode coated by polypyrrole film with ferriporphyrin(FeTPPS) has been investigated by RRDE technique, TPPS standing for meso-terakis(p-sulfonatophenyl)porphyrin. The results show that the presence of the modified layer decreases the overpotential of oxygen reduction and the reduction product is H₂O₂, which may be used to destroy organic compounds in waste water. Carbon is a better electrode substrate for the peroxide formation, as compared with Au or Pt. The rate of oxygen reduction on the modified electrode in acidic media is higher than that in neutral media. The apparent rate constant for the reaction of oxygen molecule with FeTPPS in the polypyrrole film has been estimated according to Koutecky Levich relationship. The process is explained in terms of the heterogeneous redox cata lysis i.e. EC mechanism.
- meso-tetrakis(p-sulfonatophenyl)porphyrin,
- polypyrrole modified carbon electrode,
- oxygen reduction,
- peroxide formation,
- waste water treatment
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