Jump to main content
Jump to site search

Volume 190, 2016
Previous Article Next Article

Electrolysis of metal oxides in MgCl2 based molten salts with an inert graphite anode

Author affiliations

Abstract

Electrolysis of solid metal oxides has been demonstrated in MgCl2–NaCl–KCl melt at 700 °C taking the electrolysis of Ta2O5 as an example. Both the cathodic and anodic processes have been investigated using cyclic voltammetry, and potentiostatic and constant voltage electrolysis, with the cathodic products analysed by XRD and SEM and the anodic products by GC. Fast electrolysis of Ta2O5 against a graphite anode has been realized at a cell voltage of 2 V, or a total overpotential of about 400 mV. The energy consumption was about 1 kW h kgTa−1 with a nearly 100% Ta recovery. The cathodic product was nanometer Ta powder with sizes of about 50 nm. The main anodic product was Cl2 gas, together with about 1 mol% O2 gas and trace amounts of CO. The graphite anode was found to be an excellent inert anode. These results promise an environmentally-friendly and energy efficient method for metal extraction by electrolysis of metal oxides in MgCl2 based molten salts.

Back to tab navigation

Publication details

The article was received on 20 Dec 2015, accepted on 22 Jan 2016 and first published on 22 Jan 2016


Article type: Paper
DOI: 10.1039/C5FD00231A
Citation: Faraday Discuss., 2016,190, 85-96
  • Open access: Creative Commons BY license
  •   Request permissions

    Electrolysis of metal oxides in MgCl2 based molten salts with an inert graphite anode

    Y. Yuan, W. Li, H. Chen, Z. Wang, X. Jin and G. Z. Chen, Faraday Discuss., 2016, 190, 85
    DOI: 10.1039/C5FD00231A

    This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements