Fig. 4
a CVs of Ni(OH)2 HPA (I, II) and Ni(OH)2 BHPA (III, IV) electrodes with (II, IV) and without (I, III) the presence of 0.5 mM glucose at 50 mV/s. b Nyquist diagrams EIS and equivalent circuit of Ni(OH)2 HPA and Ni(OH)2 BHPA. c CVs of Ni(OH)2 HPA electrode at various concentration of glucose and d the relationship between oxidation peak current and glucose concentration; e CVs of Ni(OH)2 HPA electrode at various scan rates with 0.5 mM glucose and f the relationship between peak current and square root of scan rates