Herein, N-doped porous carbon nano-polyhedron embedded with CoO (CoO-NPCN) was reported for the electro-catalytic oxidation and amperometric detection of l-cysteine. CoO-NPCN was synthesized by the two-step redox calcination of zeolitic imidazolate framework (ZIF). Surface morphology characterization revealed that CoO-NPCN displayed a uniform size and rhombic dodecahedral shape.
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