Enhancement of electrochemical transfer junction for cation extraction

• Published in: Electrochemistry communications Vol. 12; no. 12; pp. 1734 - 1737
• Main Authors: Seghir, S., Boulanger, C., Diliberto, S., Lecuire, J.M., Bouquet, V., Potel, M., Guilloux-Viry, M.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01.12.2010; Amsterdam Elsevier; New York, NY
• Subjects: Chemical Sciences; Chemistry; Chevrel phase; Electrochemical cation transfer; Electrochemistry; Exact sciences and technology; General and physical chemistry; Material chemistry; Metal recovery; Mo 6S 8; Porous substrate; Electrochemical cation transfer; Metal recovery; Mo 6S 8; Porous substrate; Chevrel phase; Molybdenum Sulfides; Mo; Ion transfer; Transition metal; Metal; Cobalt; Porous material; Recovery; Transport process; Substrate; S; Cations; Extraction; Junction; Charge transfer; Modified material; Mo6S8
• ISSN: 1388-2481; 1873-1902
• DOI: 10.1016/j.elecom.2010.10.009

Electrochemical transfer junctions (ETJs) were synthesized via a physical or chemical covering method onto a porous ceramic substrate (mullite and alumina). The Mo 6S 8 layer thickness ranged from 10 to 100 μm. The ETJ composites placed between two tanks lead to a cobalt transfer by applying a current density between electrodes placed in both tanks. The thickness decrease compared to a hot pressed junction allows imposing current densities equal to 7 or 9 mA cm −2 inducing 4–6 fold faster Co 2+ fluxes (1.3.10 −4 and 1.7.10 −4 mol h −1 cm −2 for physical and chemical covering respectively, versus 2.9.10 −5 mol h −1 cm −2 for hot pressed junctions).