Showing papers in "Electrochimica Acta in 2008"

TL;DR: In this article, the authors reviewed over 100 articles related to heat-treated Fe-and Co-N/C catalysts for the oxygen reduction reaction and identified a saturated metal content as a major limiting factor for further improvement of catalyst activity.

TL;DR: In this article, the authors scrutinize the thin-film rotating disc electrode (TF-RDE) method for investigating the electrocatalytic activity of high surface area catalysts.

TL;DR: The use of gold nanoparticles to provide a suitable microenvironment for biomolecules immobilization retaining their biological activity, and to facilitate electron transfer between the immobilized proteins and electrode surfaces, has led to an intensive use of this nanomaterial for the construction of electrochemical biosensors with enhanced analytical performance with respect to other biosensor designs as discussed by the authors.

TL;DR: A review on pulse and pulse reverse techniques for electrodeposition has been attempted as mentioned in this paper, where the effects of mass, transport, electrical double layer pulse parameters and current distribution on surface roughness and morphology are presented.

TL;DR: In this paper, the inhibition effect of 2-mercaptothiazoline (2MT) on the corrosion behavior of mild steel was studied in both short and long immersion times (120h) using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and linear polarization resistance (LPR) techniques.

TL;DR: In this paper, metal-assisted etching of silicon in HF/H2O2//H 2O solutions with Ag nanoparticles as catalyst agents was investigated, and the dissolution mechanisms were discussed on the basis of a localized hole injection from the Ag particles into Si and in terms of the well known chemistry of Si dissolution in HF-based chemical and electrochemical systems.

TL;DR: In this article, a transient modelling framework for vanadium redox-flow battery (RFB) is developed and experiments covering a range of vanadium concentration and electrolyte flow rate are conducted.

TL;DR: An overview of the current understanding of electro-oxidation of Pd in aqueous acidic and basic electrolytes is presented in this paper, where various experimental procedures commonly used to determine the real surface area of Palladium electrodes are outlined and compared.

TL;DR: In this article, the authors analyzed the double layer formation in room temperature ionic liquids and compared the results with the mean-field theory and the charge conservation law at large electrode polarizations.

TL;DR: In this article, the authors investigated Pt/C, Pd/C and oxide (CeO2, NiO, Co3O4 and Mn 3O4)-promoted Pd-C electrocatalysts for electrooxidation reactions of methanol, ethanol, ethylene glycol and glycerol.

TL;DR: In this paper, a general continuum theory is developed for ion intercalation dynamics in a single crystal of rechargeable-battery composite electrode material, based on an existing phase-field formulation of the bulk free energy and incorporating two crucial effects: (i) anisotropic ionic mobility in the crystal and (ii) surface reactions governing the flux of ions across the electrode/electrolyte interface, depending on the local free energy difference.

TL;DR: In this article, the purines and their derivatives, such as, guanine, adenine, 2,6-diaminopurine, 6-thioguanine and 2,7-dithiopurine were investigated as corrosion inhibitors for mild steel in 1 M HCl solution by weight loss measurements, electrochemical tests and quantum chemical calculations.

TL;DR: In this paper, the influence of the microstructure and aluminium content of commercial AZ31, AZ80 and AZ91D magnesium alloys was evaluated in terms of their corrosion behaviour in an aerated 3.5-wt. NaCl solution at 25-°C.

TL;DR: In this paper, the performance of three triazole derivatives on mild steel in 1M HCl was tested by weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS).

TL;DR: In this article, the effect of different parameters on the nature and size of the particles as well as the mechanism of formation of the nanoparticles have been studied by different techniques and it was concluded that, under the electrochemical conditions used in this work, the NP mean size was found to be constant at around 20nm when the electrooxidation current density is increased from 10 to 200μm −2.

TL;DR: In this article, three structural parameters that influenced the catalytic site density on the carbon support were identified: (i) the average particle diameter of the pristine carbon black, dparticle, available from BET area measurements; (ii) the amount of disordered phase which is proportional to WD, the width at half maximum of the D peak in the Raman spectrum of pristine carbon; and (iii) the mean size of the graphene layers characterizing the graphitic crystallites in the carbon black La.

TL;DR: In this article, the fabrication and characterization of heterojunction solar cells based on electrodeposited ZnO and Cu2O is described, and the effect of the electrodeposition conditions (pH and temperature) on the cell performance has been investigated.

TL;DR: In this paper, LiFePO4/C electrodes were characterized using X-ray diffraction and scanning electron microscopy (SEM), and the effect of cell temperature on the electrochemical reaction behaviors was investigated using electrochemical impedance spectroscopy (EIS).

TL;DR: In this article, the conductivity, the salt diffusion coefficient, the lithium-ion transport number and the thermodynamic factor of the salt and the solvent were reported for LiPF6 in EC:EMC (3:7) at 25 IC and for...

TL;DR: In this paper, the authors showed that the MnO2/PPy nanocomposite electrode material showed significantly improved specific capacitity, charge-discharge stability and the redox performance properties suitable for application in the high energy density supercapcitors.

TL;DR: In this paper, a sol-gel-based anticorrosion film for AZ31B magnesium alloy was developed and studied based on copolymerization of epoxy-siloxane and titanium or zirconium alkoxides, and tris(trimethylsilyl) phosphate was also used as additive to confer additional corrosion protection.

TL;DR: In this paper, pyrolyzed porphyrins were investigated for oxygen reduction electrocatalysis, and steady state polarization curves were obtained using gas diffusion type electrodes in 0.5 m sulfuric acid and membrane electrode assembly (MEA) configurations under working PEM fuel cell conditions.

TL;DR: In this article, the authors reviewed the recent progress of the electrodeposition of thermoelectric thin films and nanostructures including Bi, Bi 1−xSbx, Bi 2Te3, Sb2Te3 and CoSb3.

TL;DR: In this article, a low temperature fabrication method for preparation of TiO 2 porous films with high efficiency in dye-sensitized solar cells (DSSCs) has been developed.

TL;DR: In this paper, a stable and reversible capacity, 615(±10)moles of Li per mole of ZnFe 2 O 4 ) when cycled in the range, 0.005-3.0 V vs. Li at a current of 60mg −1 (0.1C) has been achieved between 15 and 50 cycles.

TL;DR: In this article, the performance of an inexpensive activated carbon used in electrochemical capacitors can be significantly enhanced by a simple treatment with KOH at 850°C, which leads to high capacitance values, which provide a noticeable energy density.

TL;DR: In this paper, the efficiency of three furan derivatives (2-methylfuran, furfuryl alcohol and furfurolamine) as corrosion inhibitors for carbon steel in 1-M HCl, was determined by gravimetric and electrochemical measurements.

TL;DR: Li4Ti5O12/carbon nano-tubes (CNTs) composite was prepared by sol-gel method while Ti(OC4H9)4, LiCH3COO·2H2O and the n-heptane containing CNTs were used as raw materials.

TL;DR: In this paper, the peak potential of the peak was linearly dependent on pH with dEp/dpH as 42mV/pH and a comparison of peak potential value of 2′,3′-dideoxyadenosine with adenosine and 2′-deoxyadensoine indicated that the difference is insignificant which has further been supported by calculations of difference of energies of lowest unoccupied and highest occupied molecular orbitals.

TL;DR: In this article, four non-porous materials were compared for their suitability as bio-anode in microbial fuel cells (MFCs), and the anode kinetics at these electrode materials were studied by means of dc-voltammetry and electrochemical impedance spectroscopy (EIS).