Microelectrode studies without supporting electrolyte: Model and experimental comparison for singly and multiply charged ions

Transport of Ions and Electrostatic Interactions in Thermoresponsive Poly (N-Isopropylacrylamide-co-Acrylic Acid) Hydrogels: Electroanalytical Studies

“…This is due to the migration of FcTMA + ; the direction is opposite to that of diffusion, and therefore, decreases the total flux and current of oxidation of FcTMA + . According to theoretical predictions [31], the total steady-state current for 1-electron oxidation of a monocharged cation should be 0.849 of the purely diffusional current.…”

“…According to theoretical prediction [31], the total limiting current for one electron reduction of +3 charged ion should be 1.173 of the diffusion current. Our experimental value is 1.19, and it is very closed to that theoretically expected.…”

Voltammetry of Ion Transfer across the Electrochemically Polarized Micro Liquid-Liquid Interface between Water and a Room-temperature Ionic Liquid, Tetrahexylammonium Bis(trifluoromethylsulfonyl)imide, Using a Glass Capillary Micropipette

“…17,19 For voltammetry in highly resistive media, ultramicroelectrodes are known to be useful. [28][29][30][31][32][33][34][35] In studying charge transfer across the interface between organic solvent-water two-phase systems, a micro liquid-liquid interface formed at the orifice of a capillary or a hole of a thin membrane has been successfully used where the solution resistance in the organic phase is considerably high. [36][37][38][39][40][41] In this paper, we describe a successful extension of this approach to the voltammetry of charge transfer in the RTIL-W two-phase systems using a micro liquid-liquid interface formed at the tip of a glass capillary to minimize the influence of the solution resistance.…”

Amperometric determination of the water content in acetone, butter and margarine using a wall-tube platinum microelectrode in a flow injection system

“…2,[7][8][9][10][11][12][13][14][15] Studies performed with microelectrodes in low conductivity media have shown that the migrational mass transport of ionic species can be significant under such experimental conditions. 13,[16][17][18][19][20][21][22][23][24] Migrational effects can, however, also be observed for uncharged species in solutions containing small amounts of added supporting electrolyte since the generation of a charged product requires the build-up of an ionic layer in the vicinity of the electrode. 13,[21][22][23]25 Recently, it has been shown 26 that the positioning of a wall tube microelectrode with respect to the capillary end and also the flow rate, potential and ionic strength influence this build-up of the ionic layer significantly.…”