Electrochemical Synthesis of Nanostructured Rhodium Deposits from Carbamide-Chloride Melts

It has been found by spectroscopy and electrochemical voltammetry that when rhodium is anodically dissolved in a carbamide-chloride melt, [Rh(NH3)4Cl2]+ complexes of D4h symmetry are formed, which are electroactive. The electrochemical behavior of rhodium in a carbamide-chloride melt under stationary and nonstationary electrolysis conditions has been studied. It has been found that the reduction of Rh(III) complexes at the cathode is controlled by the stage involving the formation of a passive film on anodic polarization.