HYBRID COPPER–COBALT HEXACYANOFERRATE FILMS MODIFIED GLASSY CARBON ELECTRODE AS AN ELECTROCHEMICAL SENSOR FOR HYDROGEN PEROXIDE

Abstract

ABSTRACT Hybrid copper–cobalt hexacyanoferrate, a new member of hexacyanoferrate family, was electrodeposited on a glassy carbon electrode and used as an electrochemical sensor for hydrogen peroxide. The modified electrode could electrocatalyze both reduction and oxidation of hydrogen peroxide in neutral solution. When cathodic catalytic current was used, the sensor exhibited a linear response in hydrogen peroxide concentration range of 2.3 × 10−3 ~8.1 × 10−7 mol/L and the detection limit of 6.6 × 10−8 mol/L. The sensor exhibited high electrocatalysis efficiency towards the reduction of hydrogen peroxide and had good stability and excellent anti-interference ability due to the low applied potential of 0.02 V.