Merino Jimenez, Irene, Ponce de Leon, Carlos and Walsh, F.C. (2014) The effect of surfactants on the kinetics of borohydride oxidation and hydrolysis in the DBFC. Electrochimica Acta, 133, 539-545. (doi:10.1016/j.electacta.2014.04.061).
Abstract
The kinetics of borohydride oxidation at gold in the presence of surfactants was analysed by cyclic voltammetry at a static disc and linear sweep voltammetry at a rotating disc electrode. The electrolytes contained 0.02 mol dm-3 NaBH4 in 3 mol dm-3 NaOH, at 23ºC, in the absence and in the presence of surfactants including alkoxylated ether non-ionic Triton X-100, sodium dodecyl sulphate (SDS) and FC4430. A rotating disc gold electrode of 0.125 cm2 geometrical area was used. Through these techniques, the value of the diffusion coefficient of the borohydride ion was found to be 0.98 × 10-5cm2s-1 and (0.33–1.63) × 10-5cm2s-1 in the absence and in the presence of surfactants, respectively. The presence of Triton X-100, and FC4430 surfactants inhibited borohydride oxidation while SDS increased the current density at concentrations lower than 0.001 wt. %. As promising results were obtained in the presence of SDS, the kinetic parameters such as the heterogeneous rate constant (at various potentials), the standard rate constant and the charge transfer coefficient were calculated in the presence of this surfactant at different concentrations.
More information
Identifiers
Catalogue record
Export record
Altmetrics
Contributors
University divisions
- Faculties (pre 2018 reorg) > Faculty of Engineering and the Environment (pre 2018 reorg) > Mechanical Engineering (pre 2018 reorg)
Current Faculties > Faculty of Engineering and Physical Sciences > School of Engineering > Mechanical Engineering > Mechanical Engineering (pre 2018 reorg)
Mechanical Engineering > Mechanical Engineering (pre 2018 reorg) - Faculties (pre 2018 reorg) > Faculty of Engineering and the Environment (pre 2018 reorg) > Southampton Marine & Maritime Institute (pre 2018 reorg)
- Faculties (pre 2018 reorg) > Faculty of Engineering and the Environment (pre 2018 reorg) > Mechanical Engineering (pre 2018 reorg) > Energy Technology Group (pre 2018 reorg)
Current Faculties > Faculty of Engineering and Physical Sciences > School of Engineering > Mechanical Engineering > Mechanical Engineering (pre 2018 reorg) > Energy Technology Group (pre 2018 reorg)
Mechanical Engineering > Mechanical Engineering (pre 2018 reorg) > Energy Technology Group (pre 2018 reorg) - Professional Services > Professional Services - Registrar > Student Services > Careers & Employability Service
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.