Catalytic Activity for Oxygen Reduction of Dual Catalysts System Based on Tetranitro-Metal Phthalocyanine and Nano-Manganese Dioxide

Abstract

The electrocatalysis properties of the dual catalysts system composed of metal nitrophthalocyanines (TNMPc, M=Fe, Ni, and Cu) and nano-manganese dioxide (nano-MnO₂) in alkaline media were studied by cyclic voltammetry, line sweep voltammetry, and chronocoulometry method. The optimum ratios of TNMPc (M=Fe, Ni, and Cu) and nano-MnO₂ were obtained. The relationships of peak current and scan rate were investigated. Furthermore, the number of electron transfer was calculated. The results implied that the dual catalysts showed higher catalytic activities involving a four-electron mechanism for oxygen reduction reaction.

Keywords:

• tetranitro-metal phthalocyanine
• nano-manganese dioxide
• oxygen reduction
• electrocatalysis

Funding

The project was supported by the Foundation for Innovative Research Groups of the National Natural Science Foundation of China (No. 512210036), the National Natural Science Foundation of China (Grant No.50832004), and the Research Fund of State Key Laboratory of Solidification Processing (NWPU; Grant No.25-TZ-2009).