Electrocatalytic Activity of Manganese Tetra 4-Aminophenyl Porphyrin Conjugated to Graphene Quantum Dots

Abstract

A manganese tetra 4-aminophenyl porphyrin (MnTAPP) was synthesized and conjugated to graphene quantum dots (GQDs) through  stacking and covalent linkage to give MnTAPP GQDs and MnTAPP@GQDs. The electrochemical behavior was tested by Cyclic voltammetry and chronoamperometry towards hydrazine. Both methods of conjugation  improved the activity of the electrocatalysis compared to individual components. MnTAPP@GQDs showed better catalytic activity of 4.36 × 10 2 Ms -1 and lowest LoD of 0.00237 µM followed by MnTAPP GQDs.