Preparation of non‐covalent Metalloporphyrin/C 60 Composite and its Electrocatalysis to Hydrogen Peroxide

Three non‐covalent metallotetraphenylporphyrin/fullerene (MTPPS 4 (M=Zn 2+ , Fe 2+ , Co 2+ )/C 60 ) nanocomposites were prepared by π‐π molecular interaction and characterized by scanning electron microscopy and UV‐Vis absorption spectroscopy. Electrocatalytic studies indicated that the MTPPS 4 /C 60 nanocomposites which were embedded in TOAB film on the glassy carbon electrode (GCE) (TOAB/MTPPS 4 /C 60 /GCE) exhibited a high electrocatalytic activity for H 2 O 2 . MTPPS 4 enhanced the electrocatalytic ability of C 60 in the increasing order of TOAB/ZnTPPS 4 /C 60 /GCE, TOAB/FeTPPS 4 /C 60 /GCE and TOAB/CoTPPS 4 /C 60 /GCE. The measurement with the differential pulse voltammetry (DPV) exhibited that there is a well‐defined linear relationship between the reduction currents and H 2 O 2 concentrations in the range from 0.3 to 1.0 mM, with the detection limit of 0.07 mM at the TOAB/ZnTPPS 4 /C 60 /GCE electrode, of 0.08 mM at the TOAB/FeTPPS 4 /C 60 /GCE electrode, of 0.04 mM at the TOAB/CoTPPS 4 /C 60 /GCE electrode, respectively. The biosensors showed a good anti‐interfering ability towards glucose, ascorbic acid and L‐cysteine and a high potential practicality.