Service interruption on Monday 11 July from 12:30 to 13:00: all the sites of the CCSD (HAL, Epiciences, SciencesConf, AureHAL) will be inaccessible (network hardware connection).
Skip to Main content Skip to Navigation
Journal articles

Magnetic field influence on mass transport phenomena

Abstract : The oxidation reactions of hexacyanoferrate(H) and hydroquinone in KCl media were studied on disk platinum electrodes using chronoamperometry under a strong magnetic field (1.74 T). The limiting current measured under magnetic field i(B) can be expressed as a function of parameters that control the mass transfer phenomenon by i(B) = KCa D-b d(c) v(e) epsilon(f) B-g n(h). C represents the electroactive species concentration (mol m(-3)), D the diffusion coefficient of the electroactive species (m(2)s(-1)), d the working electrode diameter, v the kinematic viscosity of the electrolyte (cS), epsilon the dielectric constant of the solution, B the magnetic field strength (T), n the number of electrons involved in the redox process and K is a proportionality constant. Contribution of B to the limiting current is well established (g = 1/3), whereas the contribution of D has to be confirmed (b = 1). The aim of this work was to specify the influence of the other parameters for which various results have been published in recent literature. We concluded that i(B) = KC(4/3)Dd(5/3)v(-2/3)epsilon(-7/4)B(1/3)n, quantifying for the first time, to our knowledge, the drastic influence of the electrolyte dielectric constant.
Document type :
Journal articles
Complete list of metadata

https://hal.univ-lorraine.fr/hal-01494599
Contributor : Sophie LEGEAI Connect in order to contact the contributor
Submitted on : Thursday, March 23, 2017 - 4:41:36 PM
Last modification on : Wednesday, December 15, 2021 - 9:57:43 AM

Links full text

Identifiers

Citation

Sophie Legeai, Michelle Chatelut, Olivier Vittori, Jean-Paul Chopart, Omar Aaboubi. Magnetic field influence on mass transport phenomena. Electrochimica Acta, Elsevier, 2004, 50 (1), pp.51 - 57. ⟨10.1016/j.electacta.2004.07.012⟩. ⟨hal-01494599⟩

Share

Metrics

Record views

52