Preparation of non‐covalent Metalloporphyrin/C60 Composite and its Electrocatalysis to Hydrogen Peroxide

Three non‐covalent metallotetraphenylporphyrin/fullerene (MTPPS₄ (M=Zn²⁺, Fe²⁺, Co²⁺)/C₆₀) nanocomposites were prepared by π‐π molecular interaction and characterized by scanning electron microscopy and UV‐Vis absorption spectroscopy. Electrocatalytic studies indicated that the MTPPS₄/C₆₀ nanocomposites which were embedded in TOAB film on the glassy carbon electrode (GCE) (TOAB/MTPPS₄/C₆₀/GCE) exhibited a high electrocatalytic activity for H₂O₂. MTPPS₄ enhanced the electrocatalytic ability of C₆₀ in the increasing order of TOAB/ZnTPPS₄/C₆₀/GCE, TOAB/FeTPPS₄/C₆₀/GCE and TOAB/CoTPPS₄/C₆₀/GCE. The measurement with the differential pulse voltammetry (DPV) exhibited that there is a well‐defined linear relationship between the reduction currents and H₂O₂ concentrations in the range from 0.3 to 1.0 mM, with the detection limit of 0.07 mM at the TOAB/ZnTPPS₄/C₆₀/GCE electrode, of 0.08 mM at the TOAB/FeTPPS₄/C₆₀/GCE electrode, of 0.04 mM at the TOAB/CoTPPS₄/C₆₀/GCE electrode, respectively. The biosensors showed a good anti‐interfering ability towards glucose, ascorbic acid and L‐cysteine and a high potential practicality.