Showing papers in "Journal of Electroanalytical Chemistry in 2001"

TL;DR: In this paper, a thin-film rotating disk electrode method and its application in a rotating ring disk configuration (RRDE) to the investigation of the oxygen reduction reaction (orr) on a supported catalyst powder (Pt/Vulcan XC 72 carbon).

TL;DR: In this paper, the anodic oxidation of 2-naphthol in acid media was investigated at a synthetic boron-doped diamond thin film electrode (BDD) using cyclic voltammetry and bulk electrolysis.

TL;DR: In this paper, the oxygen reduction reaction on a typical carbon supported Pt fuel cell catalyst in the presence of different anions was studied and it was shown that the reduction reaction activity decreases in the order ClO 4− HSO 4− Cl −, consistent with the increasing adsorption bond strength of the anions.

TL;DR: In this article, a physically grounded framework is provided for the behavior Z(iω)∝( iω)−β/2 (0<β<2), thus generalising the Warburg impedance (β=1).

TL;DR: In this article, the authors studied the mechanism of the oxygen reduction reaction on platinum nanoparticles supported on carbon inside Nafion ® (i.e. in PEMFC cathode conditions).

TL;DR: In this article, a hemoglobin (Hb) was immobilized successfully on nanometer-sized gold colloid particles associated with a cysteamine monolayer on a gold electrode surface.

TL;DR: In this paper, the electrochemical activity towards the hydrogen evolution reaction of pressed powder electrodes was studied in alkaline solutions after leaching out the more active element, and the electrodes displayed porous character, and electrochemical impedance spectroscopy was used to characterize surface porosity.

TL;DR: In this article, the rotational ring disk electrode (RRDE) was used for the electrochemical reduction of oxygen on bare glassy carbon (GC) and on electrodes grafted with anthraquinone.

TL;DR: In this paper, the authors studied the activity for ammonia oxidation and the intermediates formed during the reaction and found that the metal electrodissolution is enhanced by ammonia under these conditions.

TL;DR: In this paper, the use of nanoporous TiO2 and ZnO films as substrates for protein immobilisation and as electrodes for electrochemical reduction of the absorbed protein was investigated.

TL;DR: In this paper, the reaction of the hydroxyl radicals with pentachlorophenol (PCP) was studied and the evolution of the composition of the solution was followed by chromatographic analysis, COD analysis and the measurement of the total organic carbon (TOC) of the studied aqueous solution.

TL;DR: In this paper, the adsorption of l-cysteine on gold electrodes was studied by electrochemical reductive desorption in 0.5 M KOH, and the interaction of l−CSTEine with copper ions was investigated by cyclic voltammetry, chronoamperometry and X-ray photoelectron spectroscopy.

TL;DR: In this paper, an X-ray photoelectron spectroscopic study on carbon-supported Pt, Pt, Cr, CoCo, CoCr, CoNi, PtCoCo/C and CoNi/C binary alloy electrocatalysts is presented.

TL;DR: In this article, the authors studied the kinetics of the oxygen reduction reaction (orr) and the hydrogen evolution-oxidation reactions (her/hor) on the Pt(111) and Pt(100) surfaces in 0.05 M H2SO4 containing Cl−.

TL;DR: In this article, an experimental study of the impedance response of H2/O2 polymer electrolyte membrane fuel cells (PEMFC) was carried out with single cells with four Nafion® membranes (117, 115, 1135 and 112) of different thicknesses, at four temperatures in the range 25-80°C, with reactant gases humidified under different conditions.

TL;DR: In this paper, the authors used colloidal Au to enhance the DNA immobilization amount on a gold electrode and ultimately lower the detection limit of their electrochemical DNA biosensor, which was induced by exposure of the ssDNA-containing gold electrode to ferrocenecarboxaldehyde labeled complementary ssDNA in solution.

TL;DR: In this article, the anodic stability of alkyl carbonate solutions that are important for lithium and Li-ion batteries was studied using Au, Pt and Al electrodes using in situ Fourier transform infrared reflectance (FTIR) spectroscopy and an electrochemical quartz crystal microbalance (EQCM).

TL;DR: In this article, a bioelectrocatalytic system using a carbon felt electrode has been examined and discussed in view of the cathode reaction in a bio-fuel cell.

TL;DR: In this paper, the electrochemical impedance spectroscopic (EIS) responses of polyaniline (PANI)-coated graphite electrodes are governed by the process occurring at the PANI∣-electrolyte interface and the bulk faradaic redox transitions within the conducting polymer in the high-frequency and low-frequency regions, respectively.

TL;DR: In this paper, the current efficiency of CO 2 during methanol oxidation was determined by differential electrochemical mass spectrometry (DEMS) using a stochastic geometry of the Pt electrode.

TL;DR: In this article, a combination of classical steady-state voltammetry and impedance spectroscopy can help to elucidate dilemmas concerning the role of the Heyrovsky and Tafel steps in the mechanism of the hydrogen evolution reaction.

TL;DR: In this paper, the cyclic voltammetry behavior of de Levie type wire brush electrodes as models for porous electrodes, in comparison with that of single wire electrodes of the same metal, was examined under similar conditions in relation to the current response profiles of a 5 RC element hardware model circuit.

TL;DR: In this article, a light-driven molecular shuttle is organized on a gold electrode surface, consisting of a ferrocene functionalized β-cyclodextrin, Fc-β-CD, molecule threaded on a monolayer-immobilized long alkyl component containing a photoisomerizable azobenzene unit, and terminated with a bulky anthracene group.

TL;DR: In this article, the self-assembled monolayer of a di-positive nickel macrocycle (1) (dinickel(II) (2,2′-bis(1,3,5,8,12-pentaazacyclotetradec-3-yl)-diethyl disulfide) perchlorate) has been utilized for the electroanalysis of ascorbate (AA) and dopamine (DA).

TL;DR: In this article, combined radioactive labeling and electrochemical measurements were conducted to study adsorption and desorption of methanol-derived surface CO on fuel-cell grade platinum and platinum-ruthenium alloy nanoparticle catalysts.

TL;DR: In this article, a series of proton exchange membranes based on sulfonated αββ-trifluorostyrene-co-substituted-αββ -triflurostyrenes (BAM ® ) were compared to Nafion ® 117 and ethylenetetrafluoroethylene-g -polystyrene sulfonic acid membranes.

TL;DR: Some aspects of bioelectrochemistry at metal ∣ water interfaces which may provide useful information on the role played by biomolecules in biological processes are overviewed and assessed.

TL;DR: In this paper, the authors demonstrate spontaneous deposition of Pt on a Ru(0001) single crystal surface by in situ scanning tunneling microscopy and linear sweep voltammetry techniques.

TL;DR: In this article, the authors used platinum electrodes modified with a cellulose acetate membrane or with poly(1,8-diaminonaphthalene) film for rapid amperometric detection of nitrites and nitrates in water by batch and flow injection analysis.

TL;DR: In this article, a graphite powder disk sandwiched between two nickel screens was used as a lithium-insertion working electrode to evaluate the intrinsic resistance changes during charge-discharge cycling from room temperature to elevated temperatures.