Ultrathin NiOOH Nanosheets Directly Assembled on Reduced Graphene Oxide Surface as Electrocatalyst for Oxidation of Glucose and Reduced Glutathione

摘要

The aqueous NiOOH with untrathin nanosheets structure were prepared using a hydrothermal strategyand characterized by atomic force microscopy (AFM), X-ray diffraction (XRD) and scanning electronmicroscopy (SEM). It was modified on electrochemically reduced graphene oxide electrode through aself-assembly method to form NiOOH/RGO nanocomposites electrode. SEM, energy-dispersive X-rayanalysis and electrochemical impedance spectroscopy were employed to characterize the resultantNiOOH/RGO nanocomposites electrode. To study the electrocatalytic properties of the NiOOH/RGOnanocomposites, glucose and reduced glutathione (GSH) were selected as model small molecules. Anfavorable electrocatalytic activities of the NiOOH/RGO electrode was obtained toward oxidation ofglucose and GSH. The present NiOOH/RGO nanocomposites based amperometric sensor showed arapid and highly sensitive response to glucose and GSH, which might find promising applications inmedical applications, biological fuel cells and diseases diagnosis.