▎ 摘　　要

Manganese and cobalt metalated 5, 10, 15-tris(aminophenyl)-20-(4-carboxyphenyl) porphyrins (ClMnTA(3)CPP and CoTA(3)CPP) were synthesized and attached to graphene quantum dots (GQDs) via pi-pi interaction and electrostatic interaction. The electrochemical oxidation of hydrazine was performed via cyclic voltammetry and chronoamperometry. The CoTA(3)CPP showed good electrocatalytic activity towards the oxidation of hydrazine in terms of catalytic rate constants and limits of detection (LoD). ClMnTA(3)CPP showed lower overpotential 0.60 V. The introduction of GQDs improved the electrocatalytic ability when combined with CoTA(3)CPP and ClMnTA(3)CPP with the lowest LoD (0.0025 mM CoTA(3)CPP-GQDs) followed by ClMnTA(3)CPP-GQDs with 0.0033 mM.