Showing papers in "Journal of Electroanalytical Chemistry in 2002"

TL;DR: In this paper, the formation of cobalt oxide/hydroxide films in moderately alkaline medium by cyclic voltammetry was investigated, and the resulting electrodeposited film was characterized electrochemically in alkaline solutions by CVDAMmetry.

TL;DR: In this paper, the pH sensitivity of PANI and its derivatives was studied with potentiometry and UV-vis spectroscopy, and it was shown that PANI's pH sensitivity depends on the substituent and the size of the acid anion used in the electropolymerisation.

TL;DR: In this paper, the hydrogen evolution reaction (her) and the hydrogen oxidation reaction (hor) are studied on Pt(111, Pt(100), and Pt(110) single crystal surfaces in 0.1 M KOH over the temperature range 275-333 K. The results demonstrated that the kinetics of the her/hor are structure sensitive processes, with Pt (110) being about ten times more active than either of the atomically 'flatter' (100) or (111) faces at 275 K.

TL;DR: In this article, the authors investigated the transport properties of composite Nafion®-based membranes for direct methanol fuel cells (DMFC) and determined the influence of the thickness of the membrane on these properties.

TL;DR: In this paper, the B3LYP hybrid density functional theory was used to study the four-electron reduction mechanism of oxygen on platinum in aqueous acid electrolytes, and it was shown that the first electron transfer step has the highest activation barrier and hence it is rate determining, in agreement with the proposed kinetic model in the literature.

TL;DR: In this paper, a carbon-supported iron phenanthroline catalyst was used for oxygen reduction, where the active center of the catalyst consists of an iron ion, which is coordinated to four nitrogen atoms.

TL;DR: In this article, the electrochemical oxidation of saturated and sub-saturated CO adlayers on Pt(111) in 0.5 M H2SO4 has been studied using chronoamperometry.

TL;DR: In this paper, the mesoporous platinum was examined as an electocatalyst for the electrooxidation of formic acid and its performance was evaluated in a sulfuric acid solution containing 0.5 mol dm − 3 formic acids.

TL;DR: In this paper, the surface treatment of the copper single crystal electrodes was studied in detail, and the reproducibility of the CO2 reduction was greatly improved by using the X-ray back reflection method.

TL;DR: In this article, the Tafel slope, IR -drop, reaction order (H + and surface sites), electrocatalytic activity and stability have been scrutinized as functions of active layer composition.

TL;DR: Theoretical expressions for the output response of ion-insertion electrodes to a potential step assuming linear diffusion, restricted (blocking) diffusion conditions and possible limitations by insertion reaction kinetics are given in this article.

TL;DR: In this article, the electrochemical behavior of Ti and Ti7Al4.5V and Ti5Al2.5Fe alloys has been studied in Hank's solution and Fusayama-Mayer solution+0.1% F−.

TL;DR: In this article, an electrochemical procedure of anodic deposition of cobalt oxyhydroxide film on a glassy carbon substrate in an alkaline medium (i.e. pH 11.6) is described.

TL;DR: In this paper, high-dimensional boron-doped diamond (BDD) electrodes were modified covalently with tyrosinase for the determination of estrogenic phenol derivatives.

TL;DR: In this paper, Boron-doped diamond (BDD) electrodes have been examined for the electrochemical detection of six tricyclic antidepressant drugs (TCAs): imipramine, desipamine, clomipamines, amitriptyline, nortriptylines, and doxepin.

TL;DR: In this paper, the direct electrochemical reduction of hemin, protoporphyrin(IX) iron(III) chloride, ligated with strong or weak heterocyclic bases, was investigated in the ionic liquids (IL), using cyclic voltammetry and chronocoulometry.

TL;DR: In this paper, the electrocatalytic properties of various metal hexacyanoferrate film catalysts in electrolytes of various cations were determined using cyclic voltammetry and spectroscopic data.

TL;DR: In this article, a chemical modification by electrochemical deposition of Ru is performed on Pt(111) surfaces yielding mostly monoatomic Ru islands, and the presence of a second peak in the cyclic voltammogram (CV) for CO monolayer oxidation is most likely due to a dependence of the diffusion rate on the coverage of CO.

TL;DR: In this paper, an investigation on the electrodeposition of cobalt-doped lead dioxide has been carried out, as part of a study ultimately aimed at producing anodes with improved electrocatalytic activity and stability.

TL;DR: In this article, the relationship between the cation distributions in bulk and on the surface and the electrocatalytical reactivity towards the oxygen reduction reaction (orr) on thin film electrodes of cobalt and manganese spinel type oxides was studied.

TL;DR: In this article, the physical and chemical processes taking place in dye-sensitized solar cells (DSC) are reviewed in order to achieve high power efficiencies under solar irradiation, it is essential to incorporate kinetic asymmetry into the design of DSCs.

TL;DR: In this article, an array membrane electrode assembly was developed for the high throughput screening of fuel cell electrocatalysts, and the performance of the array fuel cell was demonstrated by the testing of one prepared in-house and three commercially available fuel cell catalysts.

TL;DR: In this article, a critical study of the different variables affecting the preparation of enzyme electrochemical biosensors using self-assembled monolayer (SAM)-modified electrodes is reported.

TL;DR: In this article, the dc and ac responses of an active layer in a gas diffusion electrode (GDE) have been predicted from theory, considering both diffusion and ionic ohmic drop inside the active layer and a multistep mechanism.

TL;DR: In this article, the authors studied the cathodic reduction of copper(II) in the absence and in the presence of chloride ions in an electrolyte that is comparable to galvanic copper baths (2.2 M H2SO4+0.3 M CuSO4).

TL;DR: In this article, a hybrid copper-cobalt hexacyanoferrate (CuCoHCF) was electrodeposited on a platinum electrode or a glassy carbon electrode by cyclic voltammetry and characterized by electrochemistry.

TL;DR: In this article, a hybrid polyoxometalate (POM) nanoparticle was designed and prepared by solid-state reaction at room temperature and immobilized on the surface of a wax impregnated graphite electrode (WIGE) by the sol-gel technique for the first time.

TL;DR: In this article, the formation and stripping of a cobalt adlayer were studied by electrochemical techniques at underpotential conditions, monitoring the deposition/dissolution onto/from a polycrystalline gold electrode.

TL;DR: In this article, a highly attractive, convenient and especially sensitive voltammetric approach for the study of antioxidant properties and determination of their activity is suggested, where antioxidants are substances, which interrupt radical-chain oxidation processes in organic and inorganic molecules.

TL;DR: In this paper, the structure and electrochemical properties of PtRu/C electrocatalysts obtained via the formation of a sulfide complex method and submitted to thermal treatment in reducing environments are discussed.