A novel Co3Mo3N self-embedded in porous carbon nanocomposite derived from Mo doped ZIF-67: An effective catalyst for electrochemical H2O2 sensing

•A novel Co3Mo3N self-embedded in porous carbon nanocomposite (Co3Mo3N@PC) derived from Mo-doped ZIF-67 is prepared.•The bimetallic synergy and the composite of porous carbon can tune the electronic structure of the Co3Mo3N@PC.•Co3Mo3N@PC displays good sensing performance for H2O2 detection.•Co3Mo3N@PC electrode operates efficiently in real mlik samples.