@article{jaworski_stojek_osteryoung_2003, title={Oxidation of mercury microelectrodes in complexing media in the presence and absence of supporting electrolyte: Formation of thiocyanate complexes}, volume={558}, ISSN={["0022-0728"]}, DOI={10.1016/S0022-0728(03)00389-9}, abstractNote={Normal pulse- and staircase-voltammetric oxidation of a mercury microelectrode in thiocyanate media both with and without supporting electrolyte was investigated. An equation describing the normal pulse voltammetric limiting currents flowing through a nearly spherical segment microelectrode was developed theoretically and verified experimentally. The diffusion coefficients of mercury(II) complexes containing different numbers of the thiocyanate anions were determined. A general time-dependent digital simulation scheme was developed for calculating the current for the oxidation of mercury(0) in the presence of ligands and excess supporting electrolyte and for any pulse voltammetric technique. The time-dependent mass balance equation recently developed for a system, in which diffusion coefficients of reactant and products are different, was applied. A brief review was given on the standard potentials of various mercury systems available in the literature. A general procedure for the evaluation of the stability constants of metal complexes based on the shape of the voltammograms was described and applied to the case of thiocyanato complexes of Hg(II). The stability constant results agreed well with those of Nyman and Alberts [Anal. Chem. 32 (1960) 207]. Also discussed was the determination of the formation constant β1 for Hg(SCN)+.}, journal={JOURNAL OF ELECTROANALYTICAL CHEMISTRY}, author={Jaworski, A and Stojek, Z and Osteryoung, JG}, year={2003}, month={Oct}, pages={141–153} }
 @article{jaworski_osteryoung_2001, title={General time-dependent mass balance equation}, volume={498}, ISSN={["0022-0728"]}, DOI={10.1016/S0022-0728(00)00219-9}, abstractNote={Mass balance equations at the electrode surface, for the case of time-dependent geometry of the depletion layer, that are valid for any stoichiometry and any value of diffusion coefficients, are formulated and evaluated. Analysis of the errors identifies a simple, general mass balance equation. Errors due to application of the general mass balance equation for mixed diffusion within the entire depletion layer are determined also. The focus is on mixed planar and spherical diffusion.}, number={1-2}, journal={JOURNAL OF ELECTROANALYTICAL CHEMISTRY}, author={Jaworski, A and Osteryoung, JG}, year={2001}, month={Feb}, pages={44–50} }
 @article{aoki_baars_jaworski_osteryoung_1999, title={Chronoamperometry of strong acids without supporting electrolyte}, volume={472}, ISSN={["1873-2569"]}, DOI={10.1016/S0022-0728(99)00252-1}, abstractNote={The steady-state reduction current of the hydrogen ion in a 1:1 strong acid without adding supporting electrolyte at a microelectrode is known to be independent of the diffusion coefficient of the anion, although the anion diffuses to the electrode together with the hydrogen ion in order to maintain electroneutrality. This paper aims at resolving this inconsistency of the diffusion of the anion by investigating transient reduction currents of the hydrogen ion without supporting electrolyte. The time-dependent diffusion equation associated with migration was solved under the condition of the potential step toward the limiting current-domain at a hemi-spherical electrode. The theoretical transient current has a linear relation with the inverse square root of the time. The anion behaves as if it were electroactive. The slope of the line is expressed by an average of diffusion coefficients of the hydrogen ion and the interacted anion. Chronoamperometric measurements were made in hydrochloric acid including various concentrations of supporting electrolyte.}, number={1}, journal={JOURNAL OF ELECTROANALYTICAL CHEMISTRY}, author={Aoki, K and Baars, A and Jaworski, A and Osteryoung, J}, year={1999}, month={Aug}, pages={1–6} }
 @article{jaworski_donten_stojek_osteryoung_1999, title={Conditions of strict voltammetric reversibility of the H+/H-2 couple at platinum electrodes}, volume={71}, ISSN={["1520-6882"]}, DOI={10.1021/ac9804240}, abstractNote={Cyclic voltammetric curves obtained at Pt electrodes for the hydrogen couple, H(+)/H(2), fit very well the Shuman theory, as corrected, for reversible electrode processes of other than 1:1 stoichiometry. Good agreement was obtained for acid concentrations in the millimolar range and for normal scan rates, which minimize the effect of the adsorption peaks. An error in Shuman's equation for potential is corrected. Voltammograms obtained at Pt microelectrodes fit well the theoretical simulated data.}, number={1}, journal={ANALYTICAL CHEMISTRY}, author={Jaworski, A and Donten, M and Stojek, Z and Osteryoung, JG}, year={1999}, month={Jan}, pages={243–246} }
 @article{jaworski_donten_stojek_osteryoung_1999, title={Migration and diffusion coupled with a fast preceding reaction. Voltammetry at a microelectrode}, volume={71}, ISSN={["0003-2700"]}, DOI={10.1021/ac980425s}, abstractNote={A mathematical model implemented by simulation is presented for voltammetry of a reversible couple that involves a fast preceding chemical reaction and mixed diffusional and migrational transport. The hydrogen couple, H(+)/H(2), fulfills the above criteria. For strong acids there is no preceding reaction, whereas for weak acids the preceding reaction is HA = H(+) + A(-). The computed voltammograms are compared with experimental voltammograms for the reduction of strong and weak acids at Pt microelectrodes with excess of and without supporting electrolyte. The key assumption in the calculations is that the flux of hydrogen ion is independent of the anion. This assumption is supported by the experimental fact that the wave heights in the absence of supporting electrolyte of several strong acids of equal concentration and with anions of various size are identical.}, number={1}, journal={ANALYTICAL CHEMISTRY}, author={Jaworski, A and Donten, M and Stojek, Z and Osteryoung, JG}, year={1999}, month={Jan}, pages={167–173} }
 @article{jaworski_osteryoung_donten_stojek_1999, title={The strength of acids in alcohols as determined by steady-state voltammetry}, volume={71}, ISSN={["0003-2700"]}, DOI={10.1021/ac9814593}, abstractNote={Steady-state voltammograms for reduction of acids of various strengths in alcohols with excess supporting electrolyte and without any supporting electrolyte can be used to infer charge type and strength of the acid on the basis of the phenomenon of migration. For strong and moderately weak acids (K(a)/[Formula: see text] > 10(-)(3)) in alcohols, the ratio of steady-state transport-limited current to diffusion-limited current, corrected appropriately for ion-ion interactions, the presence of ionic impurities, and changes in viscosity, for hydrogen ion reduction without supporting electrolyte and with excess supporting electrolyte equals 2. For acetic acid, which is very weak (K(a)/[Formula: see text] < 10(-)(6)), the value of the steady-state transport-limited current is, under the experimental conditions applied here, independent of supporting electrolyte concentration. In the case of a homogeneous acid-base equilibrium, a novel analytical procedure yields diffusion coefficients of both hydrogen ion and undissociated weak acid molecules from the diffusional and migrational currents. Limiting currents obtained in alcohols with excess supporting electrolyte and without supporting electrolyte are compared by means of an extended formula that incorporates the ionic strength dependence of diffusion coefficients.}, number={17}, journal={ANALYTICAL CHEMISTRY}, author={Jaworski, A and Osteryoung, JG and Donten, M and Stojek, Z}, year={1999}, month={Sep}, pages={3853–3861} }
 @article{ciszkowska_jaworski_osteryoung_1997, title={Voltammetric reduction of hydrogen ion in solutions of polyprotic strong acids with and without supporting electrolyte}, volume={423}, ISSN={["0022-0728"]}, DOI={10.1016/S0022-0728(96)04788-2}, abstractNote={Voltammetric reduction of strong polyprotic acids in solutions with excess and without supporting electrolyte was studied both theoretically and experimentally. A theoretical model based on the transport (diffusion and migration) equations and the electroneutrality principle was used to compute voltammograms by finite difference simulation under both steady state and transient conditions. Simulated voltammograms are compared with experimental reduction curves obtained at platinum microelectrodes without and with excess electrolyte for two strong polyprotic acids, sulfuric (H2SO4) and tungstosilicic (H4W12SiO40) acids. Perchloric acid (HClO4) was used as the reference for comparison. The experimental results agree well with the calculated voltammetric curves both without and with excess supporting electrolyte. The dependence of voltammetric response on the concentration of acids is also discussed.}, number={1-2}, journal={JOURNAL OF ELECTROANALYTICAL CHEMISTRY}, author={Ciszkowska, M and Jaworski, A and Osteryoung, JG}, year={1997}, month={Feb}, pages={95–101} }