A Fluidised Cathode Process for the Electrochemical Reduction of Tungsten Oxide in A Molten LiCl-KCl Eutectic

Abstract

The electrochemical reduction of metal oxides is important in the production of refractory metals. The conventional electroreduction routes have low efficiencies and limitations associated with oxide scaling on the surfaces of solid precursors, as well as issues related to effective electrolyte access. The ‘fluidised cathode’ process offers a promising substitute route to the direct electrochemical reduction. The process is demonstrated on a tungsten and LiCl-KCl model system. Cyclicvoltammetry was used to characterise the reduction electrochemistry and chronoamperometry showed the evolution of the electrodeposition process with time. The product samples were analysed using SEM and EDS. Preliminary particle coulometry measurements were also performed.