The Mediated Detection of Hydrogen Sulfide in Room Temperature Ionic Liquids by O'Mahony, A, Compton, R

“…The detection of H2S was studied using several mediators in room temperature ionic liquids (RTILs) at a microelectrode. Each mediator was characterised voltammetrically, and H2S was added to observe if any mediation took place. …”

Amperometric Gas Detection Using Room Temperature Ionic Liquid Solvents by Rogers, E, O'Mahony, A, Aldous, L, Compton, R

“…The electrochemistry of various gases, including oxygen, carbon dioxide, hydrogen, ammonia, hydrogen sulfide, sulfur dioxide and nitrogen dioxide, in room temperature ionic liquids (RTILs) is reviewed. The application of RTILs to gas sensor design and development is highlighted. …”

Selecting Room-Temperature Ionic Liquids to Optimize Voltammetric Responses: The Oxidation of NADH by O'Mahony, A, Hardacre, C, Compton, R

“…The electrochemistry of nicotinamide adenine dinucleotide (NADH) in its reduced form was examined in two room-temperature ionic liquids (RTILs): 1-ethyl-3-methylimidazolium bis-(trifluoromethylsulfonyl)imide ([C2 mim] [NTf2]) and 1-butyl-3-methylimidazolium hexafluorophos-phate ([C4 mim] [PF6]). …”

Effect of Water on the Electrochemical Window and Potential Limits of Room-Temperature Ionic Liquids by O'Mahony, A, Silvester, D, Aldous, L, Hardacre, C, Compton, R

“…Cyclic voltammetry shows that an increase in water content significantly narrows the electrochemical window of each ionic liquid. The electrochemical window decreases in the following order: vacuum-dried > atmospheric > wet at 298 K > 318 K > 338 K. …”

The electrochemical reduction of hydrogen sulfide on platinum in several room temperature ionic liquids by O'Mahony, A, Silvester, D, Aldous, L, Hardacre, C, Compton, R

“…The electrochemical reduction of 1 atm hydrogen sulfide gas (H 2S) has been studied at a platinum microelectrode (10 μm diameter) in five room temperature ionic liquids (RTILs): [C2mim] [NTf 2], [C4mpyrr][NTf2], [C4mim][OTf], [C4mim][NO3], and [C4mim][PF6] (where [Cnmim]+ = 1-alkyl-3-methylimidazolium, [NTf 2]- = bis(trifluoromethylsulfonyl)imide, [C 4mpyrr]+ = N-butyl- N-methylpyrrolidinium, [OTf] - = trifluoromethlysulfonate, [NO3]- =nitrate, and [PF6]- = hexafluorophosphate). …”

Voltammetry in room temperature ionic liquids: comparisons and contrasts with conventional electrochemical solvents. by Barrosse-Antle, L, Bond, A, Compton, R, O'Mahony, A, Rogers, E, Silvester, D

“…The recent literature is surveyed to explore the nature of voltammetry in room temperature ionic liquids. The extent of similarities with conventional electrochemical solvents is reported and some surprising differences are noted.…”

Modification and implications of changes in electrochemical responses encountered when undertaking deoxygenation in ionic liquids. by Zhao, C, Bond, A, Compton, R, O'Mahony, A, Rogers, E

“…This study highlights that (i) important physicochemical differences may arise upon addition or removal of a solute from viscous ionic liquids; (ii) degassing with dry nitrogen removes water as well as oxygen from ionic liquids, which may have implications on the viscosity and structure of the medium; (iii) particular caution must be exercised when deoxygenation is applied in ionic liquid media as part of the protocol used in electrochemical experiments to remove oxygen; (iv) gases such as oxygen, argon, and nitrogen dissolved in ionic liquids need not be innocent with respect to the properties of an ionic liquid. …”

Electrochemical Oxidation of Hydrogen Sulfide at Platinum Electrodes in Room Temperature Ionic Liquids: Evidence for Significant Accumulation of H2S at the Pt/1-Butyl-3-methylimidazolium Trifluoromethylsulfonate Interface by O'Mahony, A, Dickinson, E, Aldous, L, Hardacre, C, Compton, R

“…Electrochemical oxidation of hydrogen sulfide gas (H2S) has been studied at a platinum microelectrode (10 μdiameter) in five room temperature ionic liquids (RTILs): [C4mim][OTt], [C4dmim][NTf 2], [C4mim][PF6], [C6mim][FAP], and [P14,6,6,6][FAP] (where [Cn, mim]+ = l-alkyl-3-methylimidazolium, [Cn,dmim]- = 1-alkyl2,3-dimethylimidazolium, [P14.6.6,6]- = tris(p-hexyl)-tetradecylphosphonium, [OTf]- = trifluoromethlysulfonate, [NTf2]- = bis(trifluoromethylsulfonyl)imide, [PF6]- = hexafluorophosphate, and [FAP]- = trifluorotris(pentafluoroethyl) phosphate). …”

Kinetics and Thermodynamics of Redox Processes in Room Temperature Ionic Liquids: The Use of Voltammetry and the Disproportionation of Radical Cations of N,N-Dimethyl-p-phenylenediamine in 1-Butyl-3-methylimidazolium Tetrafluoroborate by Barnes, E, O'Mahony, A, Belding, SR, Compton, R

“…The voltammetry of N,N-dimethyl-p-phenylenediamine, DMPD, in the room temperature ionic liquid (RTIL) 1-butyl-3-methylimidazolium tetrafluoroborate, [C4mim][BF4] is studied by means of microdisc voltammetry over a wide range of voltage scan rates incorporating the transition from linear to convergent diffusion. …”

The electrochemical oxidation of catechol and dopamine on platinum in 1-Ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C(2)mim][NTf2]) and 1-Butyl-3-methylimidazolium tetrafluoroborate ([C(4)mim][BF4]): Adsorption effects in ionic liquid voltammetry by Barnes, E, O'Mahony, A, Aldous, L, Hardacre, C, Compton, R

“…The electrochemical oxidation of catechol and dopamine has been studied at a platinum micro-electrode (10 μm diameter) in two room temperature ionic liquids (RTILs): 1-Ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C2mim][NTf2]) and 1-Butyl-3-methylimidazolium tetrafluoroborate ([C4mim][BF4]). …”

Toward membrane-free amperometric gas sensors: a microelectrode array approach. by Huang, X, Aldous, L, O'Mahony, A, del Campo, F, Compton, R

“…Room temperature ionic liquids (RTILs) have been applied to a microelectrode array and been demonstrated to form effective, membrane-free amperometric gas sensors. …”

Microarrays of ring-recessed disk electrodes in transient generator-collector mode: theory and experiment. by Menshykau, D, O'Mahony, A, del Campo, F, Munõz, F, Compton, R

“…The method is applied to the ferrocene/ferrocenium couple in the room temperature ionic liquid [N(6, 2, 2, 2)][NTf(2)], and the results are found to agree with independent measurements.…”