An efficient electrocatalyst for oxygen reduction reaction derived from a Co-porphyrin-based covalent organic framework

A novel efficient electrocatalyst for oxygen reduction reaction (ORR) was synthesized by pyrolysis of a cobalt-based covalent organic framework, which shows electrocatalytic performance comparable with the commercial Pt/C for ORR via an almost four-electron pathway in alkaline media without methanol-crossover effect. This work not only provides a possible insight into the ORR at the M/N/C catalysts, but also paves a new route to the development of novel precious metal-free ORR electrocatalysts with high activities for ORR.