Concentration and electrode material dependence of the voltammetric response of iodide on platinum, glassy carbon and boron-doped diamond in the room temperature ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide

Influence of Iodide Ions Concentration on the Stability of 1-Ethyl-3-methylimidazolium Tetrafluoroborate | Molybdenum Carbide Derived Carbon Electrode Interface

“…52 Influence of I − anion concentration on the electrooxidation kinetics at Pt, glassy carbon and boron doped diamond electrodes in EMIm bis(trifluoromethanesulfonyl)imide has been demonstrated. 53 Two electrooxidation peaks and the stability constant of I 3 − 10 −4 M −1 for EMImI, NaI etc. systems has been calculated for 1-buthyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide at Pt microelectrode.…”

The electrochemical characteristics of the mixture of 1-ethyl-3-methylimidazolium tetrafluoroborate and 1-ethyl-3-methylimidazolium iodide

“…The electro-oxidation behavior of iodide ions has also been studied in several solvents [17,18]. There is a single oxidation peak for various solvents such as water, methanol and acetic acid [19,20].…”

Electroanalytical Applications of Semiintegral and Convolution Voltammetry in Room-Temperature Ionic Liquids

“…On glassy carbon, even though the I − /I 3 − plateau is not as well defined, the two processes still convincingly exhibit a 2:1 ratio, strongly suggesting that the overall iodide oxidation processes are analogous on both electrode materials. The diffusion coefficient of iodide is estimated to be 2.68 × 10 -7 cm 2 s −1 and 2.61 × 10 −7 cm 2 s −1 from the background subtracted M L plateaus on platinum and glassy carbon, respectively, in excellent agreement with each other and with the literature value of 2.68 × 10 −7 cm 2 s −1 [53,57]. This study clearly demonstrates that the information available from the semiintegrated M-E data is superior to that available from the unprocessed I-E data, further expanding upon the electroanalytical utility of cyclic voltammetry.…”

“…The discussions below pertain to the I − /I 3 − /I 2 redox processes in RTILs, a subject which has led to significant research interest in recent years [1,53,[57][58][59][60][61][62][63][64] due to the integral role that the I − /I 3 − process plays in the operation of dye-sensitized solar cells (DSSCs). A DSSC, in essence, has three fundamental components: a semiconductor photoanode (TiO 2 ) with an adhered photoactive dye, a platinized cathode (counter electrode), and an electrolyte containing a suitable redox shuttle.…”

“…(5.7), is, as expected, significantly larger than the value previously estimated by direct use of the Randles-Sevcik method (underestimated due to R u effects) and in good agreement with the value determined using numerical + has been successfully determined with high accuracy using the semiintegral method. In aprotic solvents such as acetonitrile [51,52] and analogously in a range of RTILs [53][54][55][56][57], iodide has been shown to be oxidized to molecular iodine on platinum in two steps, giving rise to two resolved voltammetric processes: The reaction mechanism is complicated by the following homogeneous equilibrium process: The sluggish heterogeneous electron-transfer kinetics of the iodide oxidation process precludes the direct application of the relationships described by the RandlesSevcik equation and mechanistic complexities make numerical simulation difficult. Fortunately, the M L plateau of a linear-sweep semiintegral voltammogram is insensitive to both sluggish heterogeneous kinetics and R u ; M-E curves obtained from the oxidation of iodide at a platinum macrodisk electrode in [C 8 , is comparable to the diffusivity of [Co(Cp) 2 ] + previously determined in this highly viscous RTIL.…”