Fig. 8
Electrochemical performance of Ag@Ni(OH)2-GNF electrode for glucose sensing. a CV profiles of the Ag@Ni(OH)2-GNF at various scan rates (2, 4, 6, 8, and 10 mV s−1) in 0.1 M NaOH electrolyte. b CV curves of Ag@Ni(OH)2-GNF and GNF (inset) in the absence and presence of 0.25 mM glucose (scan rate: 10 mV s−1). c Typical steady-state current-time response of the Ag@Ni(OH)2-GNF electrode to the successive injection of glucose into 0.1 M NaOH electrolyte (inset is the magnified region from 600 to 820 s as depicted by the blue dashed square, and the successive additions of glucose are depicted by the red arrows). d Amperometric response of the Ag@Ni(OH)2-GNF hybrid electrode to the stepwise addition of 0.2 mM glucose, ascorbic acid, fructose, dopamine, and uric acid, followed by the addition of 0.4 mM glucose at a fixed potential of 0.55 V (The successive additions of different reagents are depicted by the pink arrows). (Ag/AgCl electrode is used as a reference electrode in a and b)
