Durability of Polytetraphenylporphyrin Cobalt Adsorbed on Carbon Black as an Electrocatalyst for Oxygen Reduction

作者：Ji Yanfeng^*; Li Zhongfang; Wang Suwen; Xu Guofeng; Li Degang; Yu Xianjin

来源：Journal of the Electrochemical Society, 2011, 158(2): B139-B142.

DOI：10.1149/1.3521317

Polytetraphenylporphyrin Co(II) (PTPPCo) is obtained by heat-treating 5,10,15,20-tetra(4-carboxyphenyl)-porphyrin Co(II) at 400 degrees C in an argon atmosphere. Thermogravimetric analysis is used to evaluate the thermal stability of PTPPCo. Oxidation resistance of PTPPCo is measured by refluxing in Fentons reagent for 72 h. The ultraviolet-visible spectra indicate that PTPPCo is not decomposed and cobalt ion is not exfoliated. Polytetraphenylporphyrin Co/C (PTPPCo/C) is obtained by the heat-treatment of PTPPCo, which is adsorbed on Vulcan XC-72 with 6 wt % Co-N(4) loading, at 600 degrees C in an Ar atmosphere. Cyclic voltammetry, linear sweep voltammetry, and chronoamperometry tests are performed in order to observe the catalyst durability in different conditions. Almost no performance deficiency is observed after 10,000 continuous voltammetric cycles, 200 potentiometric cycles, and 60 h of chronoamperometry test. PTPPCo/C catalysts display significant chemical stability and electrocatalytic durability. These catalysts may be useful for polymer electrolyte membrane fuel cells.

• 出版日期2011
• 单位山东理工大学