Mesoporous Hybrid Shells of Carbonized Polyaniline/Mn₂O₃as Non-Precious Efficient Oxygen Reduction Reaction Catalyst

Shiyi Cao,Na Han,Jie Han,*Yimin Hu,Lei Fan,Chuanqiang Zhou,and Rong Guo*

School of Chemistry and Chemical Engineering, Yangzhou University

Abstract:Mesoporous hybrid shells of carbonized polyaniline (C_PANI)/Mn₂O₃with well controlled diameter and high surface area have been synthesized through surface protected calcination processes. Originated from polystyrene template, PANI, MnO₂and SiO₂were sequentially loaded, followed by template removal and calcination, resulting in the desired C_PANI/Mn₂O₃hybrid shells. The introduction of SiO₂shell was established to play the determining role in maintaining the configuration during calcination process under high temperature. The C_PANI/Mn₂O₃hybrid shellsshowed outstanding electrocatalytic activity toward oxygen reduction reaction (ORR), with theonset potential at + 0.974 V (versus RHE), the specific current at 60.8 mA/mg, and an overall quasi 4-electron transfer, which are comparable to those of the benchmark Pt/C. The remarkable ORR performance was attributed to the high specific surface area, the surface oxidation state of Mn and composition co-dependent behavior.

ACS Appl Mater Interfaces, 2016, 8, 6040-6050.

文章链接：ACS Appl Mater Interfaces-2016-8-6040