Cubic Copper Hexacyanoferrates Nanoparticles: Facile Template-Free Deposition and Electrocatalytic Sensing Towards Hydrazine
Figure 2
(a) Dependence of the cyclic voltammetric response at a CuHCF modified glass carbon paste electrode on concentrations of K+: (a) 0.01, (b) 0.05, (c) 0.1, (d) 0.5, and(e) 1 M respectively in KNO3 buffer. Insert: plot of Ep versus −log [K+]. (b) Cyclic voltammetric responses of CuHCF modified electrodes at various scan rates from 15 to 145 mV/s recorded in pH 7 PBS. Inset: Plot of oxidation peak current and the reduction current for CuHCF modified electrodes against the square root of scan rate. (c) Cyclic voltammograms (1) at a bare glassy carbon paste, (2) bare glassy carbon paste in 66 μM hydrazine in pH 7 PBS, (3) at CuHCF /GCE electrode and (4) CuHCF/GCE electrode in 66 μM hydrazine. Scan rate: 50 mV/s; (d) Chronoamperometric curves of the modified electrodes upon additions of hydrazine in PBS (pH 7) at + 0.72 V. Insert: The relationship between current response of CuHCF/GCE and hydrazine concentrations.
