✍ Scribed by I. Fonseca; M.I.S. Lopes; J.L. Santos; L. Proença
No coin nor oath required. For personal study only.
The electrocatalytic oxidation of o-sorbitol on a polycrystalline platinum electrode, in perchloric aqueous medium, was studied by cyclic voltammetry under varying sweep rate, potential limits, stirring, temperature, pH and concentration of o-sorbitoi. A value of about SOkJmol-' was obtained for the apparent activation enthalpy of the oxidation reaction at 0.1 V vs. sme. The experimental rate equation is i = kC~,,C,?.3.exp[0.4 FE/RTJ, valid for [o-sorbitol] < 0.1 mol dm -' and pH i 1.
📜 SIMILAR VOLUMES
## In this preliminary work, the electro-oxidation of lactose was investigated by cyclic voltammetry in alkaline medium on platinum electrodes. Tafel slopes and variation of electrochemical parameters indicated that the electrocatalytic oxidation of lactose was controlled by diffusion. The current
Periodic current/potential curves were taken potentiostatically at 30 mV/sec on smooth platinum in 1 N HClO, with different additions of HCl, HBr, and HI, in the potential range between hydrogen evolution and deposition of oxygen or of the respective halide ion. The effect of increasing halide ion c
The cathodic reduction of molecular oxygen was studled on bright platmum under voltammetnc contitlons m 1 N HCIO, Periodic current-potential curves were measured at 30 mV/s, and the ohnuc and capacitive components of the impedance platmum/solutlon were determmed under the same con&tlon at 1000 c/s m