In this study, the electrochemical mechanism of catechol in presence and absence of nitrite ion, is investigated in phosphate buffer medium (pH=7) using platinum electrode through cyclic voltammetry method in various scan rates. Electrochemical oxidation of catechol showed how quinone has changed to o-benzoquinone and also how o-benzoquinone has reacted with nitrite ion and potential scan rate ...

a graphene nanosheets (gns) film coated glassy carbon electrode (gce) was fabricated for sensitive determination of tyrosine (tyr). the gns-based sensor was characterized by scanning electron microscope and electrochemical impedance spectroscopy. the voltammetric techniques were employed to study electro-oxidation of tyr. the results revealed that the modified electrode showed an electrocatalyt...

in the present study, we investigate the potentiometric behavior of cu2+ carbon paste electrodes based on two mercapto compounds 2-ethylmino-5-mercapto-1,3,4-thiadiazole (eamt) and 2-acetylamino-5-mercapto-1,3,4-thiadiazole (aamt) self-assembled on gold nano-paricle (gnp) as ionophore. then, the results obtained from the modified electrodes are compared. the self-assembled ionophores exhibit a ...

To improve the repair effect of electrochemical chloride extraction, a modified electrode configuration is applied in this investigation. In this configuration, two auxiliary electrodes placed in the anodic and cathodic electrolytes were used as the anode and cathode, respectively. Besides this, the steel in the mortar was grounded to protect it from corrosion. By a comparative experiment, the ...

a feasible and fast method to fabricate hydrogen peroxide sensor was investigated by graphene-manganase nanocomposite carbone paste electrode. in the present work, in first step, the graphene was synthesized by chemical method and in second step, manganese oxide nanoparticle was doped on graphene. graphene-manganase nanocomposite was characterized by ftir and sem. the nanocomposite shows a high...

Titania nano particles were synthesized at carbon paste electrode by cyclic voltammetry and then it was employed for the determination of acetaminophen in phosphate buffer at pH 7.4. Carbon paste electrode with titania nano particle displayed excellent electrochemically catalytic activities by shifting the oxidation potential of acetaminophen towards the negative side. The mass transfer process...

A silicon microchannel plate (MCP) array electrode modified with over-oxidized polypyrrole (OPPy) has been fabricated to detect glucose. The morphology and structure of the electrode are characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The OPPy modified silicon MCP array electrode exhibits high electrocatalytic activity as well as excellent selectivity to the ele...

The combination of multi-walled carbon nanotubes and ionic liquid 1-octylpyridinium hexaflourophosphate (OPFP) yields a carbon nanocomposite (MWCNT-CILE) that can be well used aselectrode for electrocatalytic oxidation of venlafaxine (VEN). The influence of variousexperimental parameters including pH of the solution, the amount of multi-walled carbon nanotubeused for the modification of the car...