Microwave activation of processes in mesopores: The thiourea electrooxidation at mesoporous platinum by Ghanem, M, Coles, B, Compton, R, Marken, F

“…In situ microwave activation is applied to the electrochemical oxidation of thiourea at low surface area (polished polycrystalline) and at high surface area (electrodeposited mesoporous platinum coated) platinum microelectrodes. The one electron oxidation of thiourea to formamidine disulfide is monitored as a function of the different activation parameters. …”

Microwave enhanced electroanalysis of formulations: processes in micellar media at glassy carbon and at platinum electrodes. by Ghanem, M, Compton, R, Coles, B, Canals, A, Marken, F

“…However, for the determination of alpha-tocopherol in a commercial formulation interference from proteins is observed at platinum electrodes and direct measurements are possible only over a limited concentration range and at glassy carbon electrodes.…”

THE PHOTO-CE MECHANISM - THE OXIDATION OF TRIS-(PARA-TOLYL)AMINE IN ACETONITRILE AT AN ILLUMINATED PLATINUM-ELECTRODE by Fisher, A, Coles, B, Compton, R, Bethell, D, Tripathi, S

New results from laser-induced temperature jump studies of gold and platinum single crystal electrodes. by Climent, V, Coles, B, Compton, R, Feliu, J

Methylene green voltammetry in aqueous solution: Studies using thermal, microwave, laser, or ultrasonic activation at platinum electrodes by Akkermans, R, Roberts, S, Marken, F, Coles, B, Wilkins, S, Cooper, J, Woodhouse, K, Compton, R

“…The voltammetry of the aqueous two-electron reduction of the phenothiazine dye methylene green, known to be passivating at platinum electrodes, is reported under simultaneous activation with each of the following techniques: thermal activation in the temperature range 15-80°C, pulsed microwave activation with a modified 800 W, 2.45 GHz domestic microwave oven, 10 Hz pulsed laser activation with a Nd:YAG laser at 532 nm, sonication, or ultrasonic activation where a 20 kHz ultrasonic horn probe is employed to generate an aqueous/ organic solvent emulsion. …”

Coulostatic potential transients induced by laser heating of platinum stepped electrodes: influence of steps on the entropy of double layer formation by Climent, V, Coles, B, Compton, R, Feliu, J

“…We have applied the temperature jump method to the study of the properties of the electrochemical double layer formed in contact with platinum stepped surfaces vicinal to the (111) orientation. …”

Microwave effects on the electrochemical deposition of copper by Sur, UK, Marken, F, Compton, R, Coles, B

“…The effects of microwave radiation on the electro-deposition of copper metal on platinum, gold, and carbon electrode surfaces are studied by cyclic voltammetry and scanning electron microscopy. …”

Microwave-enhanced electrochemical processes in micellar surfactant media by Ghanem, M, Marken, F, Coles, B, Compton, R

“…High intensity microwave radiation effects are demonstrated for electron transfer processes at 25 or 50-μm diameter platinum electrodes immersed in micellar sodium dodecylsulfate (SDS) solutions. …”

The application of fast scan cyclic voltammetry to the high speed channel electrode by Rees, N, Klymenko, O, Maisonhaute, E, Coles, B, Compton, R

“…Experiments are reported for the oxidation of 9,10-diphenylanthracene (DPA) in acetonitrile solution containing 0.10 M tetrabutylammonium perchlorate (TBAP) for both 12.5 and 40 μm platinum microband electrodes using a range of scan rates from 50 to 3000 V s-1 and centre-line flow velocities from 12 to 25 m s-1. …”

Microwave activation of electrochemical processes at microelectrodes by Compton, R, Coles, B, Marken, F

“…Electrochemical experiments at platinum microdisc electrodes are shown to be possible in an environment of intense microwave radiation and a considerable current enhancement observed for the ferrocyanide/ferricyanide redox couple in aqueous 1 M KCl is shown to be Faradaic in nature consistent with a rapid heating effect causing the temperature in the liquid phase at the electrode/solution interface to locally superheat.…”

Microwave activation in ionic liquids induces high temperature-high speed electrochemical processes. by Sur, UK, Marken, F, Coles, B, Compton, R, Dupont, J

“…Self-focusing of intense microwave radiation at the tip of a 25 microm diameter platinum disk microelectrode immersed into the ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate (BMIM(+)PF(6)(-)) containing 1 mM ferrocene causes dramatically (two orders of magnitude) enhanced voltammetric current signals and temperatures in excess of 600 K (at the electrode surface)--extreme conditions sufficient for condensed phase pyrolysis processes to occur.…”

In-situ electrochemical ESR the oxidation of triphenylacetic acid in acetonitrile by Compton, R, Coles, B, Day, M

“…The oxidation of triphenylacetic acid in acetonitrile on platinum electrodes at + 1.94 V (vs. SCE) results in the formation of triphenylmethylcarbonium ions. …”

PHOTOELECTROCHEMICAL ELECTRON-SPIN RESONANCE .2. THE REDUCTION OF CRYSTAL VIOLET IN ACETONITRILE by Compton, R, Coles, B, Stearn, G, Waller, A

“…The reduction of the dye crystal violet in acetonitrile solution at platinum electrodes has been investigated using in situ electrochemical e.s.r. and a channel electrode flow cell. …”

VOLTAMMETRY UNDER HIGH-MASS TRANSPORT CONDITIONS - THE HIGH-SPEED CHANNEL ELECTRODE AND HETEROGENEOUS KINETICS by Rees, N, Alden, J, Dryfe, R, Coles, B, Compton, R

“…Experiments utilizing the one-electron reduction of benzoquinone in acetonitrile solution, containing 0.1 M tetrabutylammonium perchlorate (TBAP) as supporting electrolyte, at a 5 μm platinum microband electrode gave a value of k0 equal to 0.30 (±0.04) cm s-1, in excellent agreement with independent measurements reported for the same system. …”

Microwave enhanced electrochemistry: mass transport effects and steady state voltammetry in the sub-millisecond time domain by Sur, UK, Marken, F, Rees, N, Coles, B, Compton, R, Seager, R

“…A systematic study of the microwave activation effects in electrochemical processes is reported for two redox systems, Fe(CN) 63-/4- and Ru(NH3)63+/2+, in aqueous KCl solution. Platinum microelectrodes of 100, 50, and 25 μm diameter are employed and at the 25 μm diameter electrode, extreme current enhancements of up to three orders of magnitude are detected. …”

Microwave activated voltammetry: The thermally enhanced anodic stripping detection of cadmium by Marken, F, Matthews, S, Compton, R, Coles, B

“…At a mercury film electrode deposited on platinum temperatures in excess of 150°C can be applied in voltammetric experiments in a constant heating mode.…”

The high speed channel electrode applied to heterogeneous kinetics: the oxidation of 1,4-phenylenediamines and related species in acetonitrile by Rees, N, Klymenko, O, Coles, B, Compton, R

“…Experiments to investigate the standard electrochemical rate constant, k0, of the oxidation of 1,4-phenylenediamine (PPD), N,N-dimethyl-1,4-phenylenediamine (DMPD), and N,N-diethyl-1,4-phenylene-diamine (DEPD) in acetonitrile solutions containing 0.10 M tetrabutylammonium perchlorate (TBAP) are reported for 2.5 and 5 μm platinum microband electrodes using a range of centre-line velocities from 12 to 25 m s-1. …”

Fast scan linear sweep voltammetry at a high-speed wall-tube electrode by Rees, N, Klymenko, O, Coles, B, Compton, R

“…Experiments are reported for the oxidation of N,N,N′,N′-tetramethyl-p-phenylenediamine (TMPD) in propylene carbonate solution containing 0.10 M tetrabutylammonium perchlorate for a 24 μm radius platinum microdisk electrode housed within the HWTE using a range of scan rates from 200 to 3000 V s-1 and average flow jet velocities from 0.24 to 9.4 m s-1 (corresponding to volume flow rates of 0.003-0.12 cm3 s-1, and centre-line jet velocities from 0.5 to 18.9 m s-1). …”

Hydrodynamics and mass transport in wall-tube and microjet electrodes: An experimental evaluation of current theory by Rees, N, Klymenko, O, Coles, B, Compton, R

“…Experiments are reported for the oxidation of N,N,N′,N′-tetramethyl-p-phenylenediamine (TMPD) in propylene carbonate (PC), water, butyronitrile (BN), acetonitrile (AN), and acetonitrile-water mixture solutions containing 0.10 M supporting electrolyte for a 24 μm radius platinum microdisk electrode housed within the HWTE using a range of average flow jet velocities from 0.03 to 19.8 m s-1 (corresponding to volume flow rates of 0.003-0.25 cm3 s-1 and center-line jet velocities from 0.05 to 39.5 m s-1). …”

An electrochemical study of the oxidation of 1.3,5-Tris[4-[(3-methylphenyl)phenylamino]phenyl]benzene by Rees, N, Wadhawan, J, Klymenko, O, Coles, B, Compton, R

“…Experiments to investigate the standard electrochemical rate constants, k0, transfer coefficients, α, and formal potentials, Ef0, of the observable oxidations of TMPB in both DMF and DCM solutions containing 0.10 M tetrabutylammonium perchlorate (TBAP) are reported for 12.5 μm platinum microband electrodes using a range of linear flow velocities from 12 to 25 m s-1. …”