Co3O4 nanoparticles assembled on polypyrrole/graphene oxide for electrochemical reduction of oxygen in alkaline media

Co3O4/Ppy/GO demonstrated excellent electrocatalytic performance in terms of higher catalytic activity, and four-electron selectivity for ORR. This can be attributed to the bridging of Co3O4 nanoparticles and graphene oxides with Ppy, as well as the effective N doping of GO.