Catalase-inorganic hybrid microflowers modified glassy carbon electrode for amperometric detection of hydrogen peroxide

Abstract

A catalase-inorganic hybrid microflowers (Cat-HMFs) modified glassy carbon electrode (GCE) was fabricated for amperometric detection of hydrogen peroxide (H2O2). Cat-HMFs were prepared by the co-precipitation of catalase and copper phosphate crystals via sonochemistry. Cat-HMFs/GCE showed linear current responses under the H2O2 concentration of 100 μM–10 mM, and the detection limit is 50 μM. After stored under ambient conditions for 30 days, Cat-HMFs/GCE still remained 92% of its initial activity, which demonstrates Cat-HMFs/GCE has excellent long-term stability.