Journal of Applied Electrochemistry

, Volume 13, Issue 3, pp 383–393 | Cite as

Cyclic voltammetry of group VIII metals in cyanide melts

  • E. TH. Van Der Kouwe
  • D. J. Muller


Group VIII metals were studied in a (Na, K)CN eutectic melt by cyclic voltammetry at 550° C. The aim was to obtain an overview of the behaviour of these metals in molten cyanide and possibly determine the oxidation state(s) of the metal complexes. Molten cyanide tends to stabilize low-oxidation-state platinum-group metals. Metal ions (M) were present for iridium and rhodium as M(III) and M(I), while for platinum and palladium as M(II) and M(I) complexes, respectively. The last two elements could also be obtained as M(O) species by electrochemical reduction of M(II) complexes. Cyclic voltammograms of all four elements showed a reversible reaction between two soluble species with a two electron transfer. Other elements studied were ruthenium, osmium, copper and silver which all occurred in one oxidation state only.


Oxidation Copper Platinum Electron Transfer Palladium 
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Copyright information

© Chapman and Hall Ltd. 1983

Authors and Affiliations

  • E. TH. Van Der Kouwe
    • 1
  • D. J. Muller
    • 1
  1. 1.Chemistry DepartmentNUCORPretoriaSouth Africa

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