Electrochemical Impedance Spectroscopy Studies on Oxygen Reduction Reaction Catalysed by Macrocyclic  Metal Phthalocyanine Compounds

Chem. J. Chinese Universities ›› 2011, Vol. 32 ›› Issue (10): 2371.

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Electrochemical Impedance Spectroscopy Studies on Oxygen Reduction Reaction Catalysed by Macrocyclic Metal Phthalocyanine Compounds

MA Jin-Fu^1*, LIU Yong-Ning²

1. School of Materials Science and Engineering, North University for Ethnics, Yinchuan 750021, China;
2. State Key Laboratory for Mechanical Behavior of Materials, Xi′an Jiaotong University, Xi′an 710049, China

Received:2010-10-22 Revised:2011-03-29 Online:2011-10-10 Published:2011-09-11
Contact: MA Jin-Fu E-mail:majf0870@163.com
Supported by:
国家民委、宁夏回族自治区省部共建“粉体材料与特种陶瓷”重点实验室项目(批准号: 200901)和宁夏回族自治区自然科学基金项目（批准号: NZ11144）资助.

Abstract

Abstract: The oxygen reduction reaction(ORR) catalyzed by metal phthalocyanine macrocycles(FePc, CoPc, FeCoPc2) in alkaline solution was investigated by line sweep voltammograms(LSV) and electrochemical impedance spectroscopy(EIS). The results of these two methods have the same trend. The characteristic of two semi-circles and an arc on the gas diffusion electrodes were presented on the EIS Nyquist plot, and the EIS curves at the potential -02 V(vs. Hg/HgO) were fitted by the equivalent circuit with analytical software Z simpwin. The result show that ORR on MPcs is an 2-electron transfer process with an intermediate product of HO-2. The simulated kinetics data of the equivalent circuit was also analyzed. Fitting results of equivalent circuit show that the FeCoPc2/C as ORR catalyst for reducing has higher catalytic activity because of lower Rc+Rct than that of FePc/C, CoPc/C.

Key words: Metal phthalocyanine; , Air electrode, AC impedance, Oxygen reduction reaction

CLC Number:

O646.5

TrendMD:

MA Jin-Fu*, LIU Yong-Ning. Electrochemical Impedance Spectroscopy Studies on Oxygen Reduction Reaction Catalysed by Macrocyclic Metal Phthalocyanine Compounds[J]. Chem. J. Chinese Universities, 2011, 32(10): 2371.

References

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Electrochemical Impedance Spectroscopy Studies on Oxygen Reduction Reaction Catalysed by Macrocyclic Metal Phthalocyanine Compounds

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