Electrochemical engineering of anodic oxygen evolution in molten oxides
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Molten oxide electrolysis (MOE) is a metal extraction process that exhibits an exceptionally high productivity in comparison with other electrowinning techniques. Furthermore, MOE has the ability to generate oxygen as an environmentally benign byproduct, which is a key asset to improve metal extraction sustainability. From an electrochemical engineering standpoint, the high concentration of metal cations dissolved in the electrolyte justifies cathode current densities above 10,000 A m[superscript −2]. At the anode, the available data suggest a mechanism of oxidation of the free oxide anions which concentration in oxide melts is reported to be limited. In this context, the application of available mass-transfer correlations for the anodic oxygen evolution suggests a key role of convection induced by gas bubbles evolution.
DepartmentMassachusetts Institute of Technology. Department of Materials Science and Engineering
Allanore, Antoine. “Electrochemical Engineering of Anodic Oxygen Evolution in Molten Oxides.” Electrochimica Acta 110 (November 2013): 587–592.
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