Effect of Gelatin on the Reduction of Cobalt(II) in Thiocyanate Solutions at Mercury Electrodes

Abstract

Reduction of cobalt(II) in thiocyanate solutions at mercury electrodes has been greatly accelerated in the presence of small amounts of gelatin. This accelerating effect results in an inhibition of the amalgamation of electrodeposited Co(0)SCN−, which reacts chemically to yield CoS and CN−. Both CoS and CN− further stimulate the reduction of cobalt(II).