Bimetallic CuCo Derived from Prussian Blue Analogue for Nonenzymatic Glucose Sensing

Abstract Bimetallic CuCo composites are prepared by calcinating copper hexacyanocobaltate precursor in N 2 atmosphere. The CuCo modified electrodes are fabricated for nonenzymatic glucose sensing in the alkaline electrolyte. The glucose can be directly electro‐oxidized on the surface of the electrode catalyst mediated by the redox couples of Cu and Co. The optimal glucose sensor exhibits a high sensitivity (567 μA ⋅ mM −1 ⋅ cm −2 ) in the range up to 825 μM with a detection limit of 3 μM and acceptable selectivity. The sensor can also be applied in serum samples. This work provides a facile and easily‐scalable synthesis method of electrocatalysts for nonenzymatic glucose sensors.