▎ 摘　　要

NOVELTY - Incorporating at least one single atom transition metal catalytic site in a carbon nanomaterial, comprises mixing a metal-porphyrin complex with at least one carbon nanomaterial to form a mixture and subjecting the mixture to microwave irradiation. USE - The method is useful for incorporating at least one single atom transition metal catalytic site in a carbon nanomaterial. ADVANTAGE - The method: provides time and energy efficient approach to the fabrication of electrochemical single atom catalysts without metal aggregation, employing microwave assisted pyrolysis of a porphyrin-metal complex; and rapidly achieves high temperature generated by microwave heating causing ejection of the metal-porphyrin complex or separated metal and porphyrin species from the MOF. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a single atom catalyst comprising many catalytic sites embedded in a holey carbon support, which comprises many nanoholes connected by nearly defect free graphene domains, where each of the catalytic sites independently comprises a transition metal center which is coordinated by four planar nitrogen atoms, where each nitrogen atom is bonded to the holey carbon and each transition metal in each of the catalytic sites is not significantly aggregated with any other transition metal within the catalyst.