Electrochemical Performance of Graphene blended NiFe2O4 Composite

Graphene was blended with Nickel ferrite in the form of nanocomposite, which was prepared by solid state synthesis using tartaric acid as an activating agent. The nanocomposite was characterized by XRD, SEM, FTIR and UV Visible spectroscopy. Unlike the other composite materials, the Graphene – Nickel ferrite composite (GNFC) showed high specific reversible capacity, which has been studied by the cyclic voltammeter. The electrochemical impedance studies of GNFC proved that such material can be useful for the anode material of the Li-ion batteries. The fast charge-discharge property may be due to the heteroarchitechure of the GNFC..

Spectroscopic, Electrochemical, andIn SilicoCharacterization of Complex Formed between 2-Ferrocenylbenzoic Acid and DNA

We present the synthesis of 2-ferrocenylbenzoic acid (FcOH) and its electrochemical and spectroscopic characterization. FcOH was characterized for interaction with DNA using theoretical and experimental methods. UV-visible spectroscopy and cyclic voltammeter (CV) were used for the experimental account of FcOH-DNA complex. The experimental results showed that the FcOH interacts by electrostatic mode. The binding constant (Kb) and Gibbs free energy (ΔG) for the FcOH-DNA complex have been estimated as 5.3 × 104 M−1and −6.44 kcal/mol, respectively. The theoretical DNA binding of FcOH was studied with AutoDock molecular docking software. The docking studies yield good approximation with experimental data and explain the sites of binding.

Electrochemical Detection of Hydrazine Using Cobalt Hexacynoferrate Deposited Carbon Sphere Modified Glassy Carbon Electrode

Cobalt hexacynoferrate decorated carbon spheres (CoHCF@C) with few micron dimensions was synthesized by sequential deposition method in which the carbon sphere previously modified with cobalt ion exposed into potassium ferricyanide. The thickness of the CoHCF layer was restricted to five cycles. The formation of layer CoHCF was confirmed by FT-IR, XRD, HRSEM, EDX and cyclic voltammeter technique. The CoHCF decorated carbon sphere modified GCE was utilized as electron transfer mediator for electrocatalytic oxidation of hydrazine in phosphate buffer medium. The electrocatalytic behavior of modified electrode on oxidation of hydrazine is compared with bare GCE. The amperometry method was adapted for the quantitative detection of hydrazine in water samples.

Characterization and electrocatalytic application of silver modified polypyrrole electrodes

Silvermodified polypyrrole electrodes were prepared with the aim of testing them for the electro oxidation of formaldehyde in alkaline solution. The modification of polypyrrole by immersion in aqueous AgNO3 solution was studied by cyclic voltammeter and vacuum techniques (AES and XPS). The influence of time of immersion and the thickness of the polypyrrole film, prepared by electrochemical polymerization, on the modification of the polymer were examined. The results acquired from both electrochemical and spectroscopic examinations show that immersion of a polypyrrole electrode in a AgNO3 solution results in its modification with silver, which is deposited in the elemental state on the surface. The quantity of silver deposited depends not only on the immersion time but also on the thickness of the polymer film. A modified PPy/Ag electrode exhibits catalytic activity for the electro oxidation of CH2O in NaOH. In spite of the low quantity of silver, the activity of the electrode for this reaction is comparable to that of a polycrystalline silver electrode.