caa a22 4500 477050123 CHVBK 20180405111339.0 cr unu---uuuuu 170330e19960301xx s 000 0 eng 10.1007/BF00242093 doi (NATIONALLICENCE)springer-10.1007/BF00242093 Investigation of the aluminium electrodeposition process in cryolite-based melts using a rotating ring-disc electrode: evidence for the existence of a subvalent intermediate species [Elektronische Daten] [R. Stojanovic, R. Dorin, E. Frazer] The rotating ring-disc electrode technique has been used to investigate the reaction mechanism of the aluminium electrodeposition process in cryolite-based electrolytes. Laboratory studies using high temperature gold-molybdenum and platinum-molybdenum rotating ring-disc electrodes have provided evidence for the existence of a subvalent intermediate species (Al (I)). In a cryolite-alumina electrolyte (bath ratio: 1.5), two well separated convective-diffusion controlled oxidation processes were observed at both a gold and a platinum ring during aluminium electrodeposition at the disc. On the basis of the data presented, a reaction scheme involving reduction of A1(III) to A1(0) via A1(I), followed by chemical dissolution of A1(0) into the bulk electrolyte was proposed. The loss of current efficiency in aluminium smelting was primarily attributed to the chemical dissolution of A1(0), rather than to the formation of a subvalent intermediate species. Chapman & Hall, 1996 Stojanovic R. Institute of Minerals, Energy and Construction, CSIRO Division of Minerals, PO Box 124, 3207, Port Melbourne, Victoria, Australia aut Dorin R. Institute of Minerals, Energy and Construction, CSIRO Division of Minerals, PO Box 124, 3207, Port Melbourne, Victoria, Australia aut Frazer E. Institute of Minerals, Energy and Construction, CSIRO Division of Minerals, PO Box 124, 3207, Port Melbourne, Victoria, Australia aut Journal of Applied Electrochemistry Kluwer Academic Publishers 26/3(1996-03-01), 249-254 0021-891X 26:3<249 1996 26 10800 https://doi.org/10.1007/BF00242093 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00242093 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Stojanovic R. Institute of Minerals, Energy and Construction, CSIRO Division of Minerals, PO Box 124, 3207, Port Melbourne, Victoria, Australia aut NATIONALLICENCE 700 1- Dorin R. Institute of Minerals, Energy and Construction, CSIRO Division of Minerals, PO Box 124, 3207, Port Melbourne, Victoria, Australia aut NATIONALLICENCE 700 1- Frazer E. Institute of Minerals, Energy and Construction, CSIRO Division of Minerals, PO Box 124, 3207, Port Melbourne, Victoria, Australia aut NATIONALLICENCE 773 0- Journal of Applied Electrochemistry Kluwer Academic Publishers 26/3(1996-03-01), 249-254 0021-891X 26:3<249 1996 26 10800 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer