نتایج جستجو برای: electrochemical behavior

تعداد نتایج: 666139  

In this study, ceramic coatings were prepared on AZ31B Mg alloy by plasma electrolytic oxidation technique in electrolytes containing sodium fluoride (KF), sodium silicate (Na2SiO3.5H2O) and different potassium hydroxide (KOH) concentrations. The electrochemical behavior of AZ31B alloy and plasma electrolytic oxidation coatings was studied by potentiodynamic polarization, electrochemical impeda...

Journal: :Computers & Chemical Engineering 2010
S. A. Martínez-Delgadillo H. R. Mollinedo P. M. A. Gutiérrez I. D. Barceló J. M. Méndez

In the present work, the performance of a tubular electrochemical reactor operated with three different inlets (central, lateral and tangential) was evaluated. Fluid flow simulations through the electrochemical reactor were performed using computational fluid dynamics (CFD). The steady state fluid flow was simulated to visualize the velocity field behavior along the reactor for each different i...

Journal: :journal of sciences islamic republic of iran 0

electrochemical behavior of i-hydroxypyridine-2-thione and its vanadium complex is studied using polarographic techniques. polarograms of ligand and that of the complex is shown with diffusion characteristics of the waves. cyclic voltagram of thione is investigated which shows that a reversible oxidation reduction of one electron process is taking place. pka of the thione is found to be in clos...

Journal: :iranian chemical communication 2016
mir ghasem hosseini elham shahryari

composite electrodes of polyaniline/mno2-multi walled carbon nanotube (pani/mno2-mwcnt), mno2-mwcnt nanocomposites and mwcnt was produced by the in situ direct coating approach. the supercapacitor performance of the nanocomposites was studied by fourier transform infrared (ft-ir) spectroscopy and scanning electron microscopy (sem). the electrochemical properties of electrodes were also investig...

Journal: :international journal of nano dimension 0
z. sharifi department of material engineering, shiraz university, shiraz, iran m. pakshir department of material engineering, shiraz university, shiraz, iran f. ghofrani department of material engineering, shiraz university, shiraz, iran s. babamohammadi department of chemistry, shiraz university, shiraz, iran.

a new anti-corrosion compound, melamine formaldehyde (mf), was formulated by the addition of proper amount of formaldehyde to melamine under specific conditions. this compound was mixed with a novel nano powder, which was extracted from corn cob ash containing sio2 particles, in order to improve its corrosion inhibition efficiency. this inhibitor provides a high level of protection for steel su...

Journal: :physical chemistry and electrochemistry 0

the electrochemical oxidation of methyl catechol in the presence of 2-thiouracil (as a nucleophile) has beenperformed in aqueous solutions using cyclic voltammetry and controlled-potential coulometric techniques.the electrochemical behavior of methyl catechol in the presence of 2-thiouracil was investigated. theelectrochemical synthesis of this compound has been successfully performed in an und...

2010
Peng Jiang Jeng-Lung Chen Ferenc Borondics Per-Anders Glans Mark W. West Ching-Lin Chang Miquel Salmeron Jinghua Guo

A novel electrochemical setup has been developed for soft x-ray absorption studies of the electronic structure of electrode materials during electrochemical cycling. In this communication we illustrate the operation of the cell with a study of the corrosion behavior of copper in aqueous NaHCO3 solution via the electrochemically induced changes of its electronic structure. This development opens...

In this study, pencil graphite electrode was modified using conductive polypyrrole (Ppy) and grapheme (GF) nanocomposite for electrochemical determination of insulin. Electrochemical behavior of insulin on PGE was investigated using cyclic voltammetric (CV) and differential pulse voltammetric (DPV) and chronoaprometry (CA) methods. Several effective parameters including pH, concentration, and s...

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