Non‐enzymatic electrochemical sensors for the detection of H ₂ O ₂ based on Mn ₃ O ₄ octahedron submicrostructures

Abstract

In this reported work, Mn 3 O 4 octahedron submicrostructures (Mn 3 O 4 OSMs) were obtained through a facile solvothermal method in mixed solvent. The authors have modified a glassy carbon electrode (GCE) with Mn 3 O 4 OSMs and Nafion to obtain a sensing platform (Mn 3 O 4 OSMs/Nafion/GCE) for the non‐enzymatic detection of H 2 O 2 . The resulting Mn 3 O 4 OSMs/Nafion/GCE exhibited good electrochemical catalytic activity towards the reduction of H 2 O 2 in a phosphate buffered solution (0.1 M, pH = 7.0). The linear detection range was estimated to be in the range from 5 µM to 17 mM ( R = 0.9998), and the detection limit was estimated to be 1.5 µM at S / N = 3. Real sample analyses show that the sensor developed in this work could be efficiently used for the determination of H 2 O 2 .