Speciation analysis applied to the electrodeposition of precursors of neodymium cuprate and related phases First application of speciation modelling to a solution not at equilibrium

摘要: We report the first time that speciation analyses have been used to explain distribution of products obtained by a system not at equilibrium: films insoluble metal hydroxide cathodic electroprecipitation from aqueous solutions containing nitrate salts Nd3+ and Cu2+. Variation in film composition is achieved manipulating deposition parameters, such as voltage Va solution composition. The variations are caused changes electrode/solution interface differences solution- solid-phase characteristics two metals their hydroxides.The experimental compositions Nd–Cu hydroxides correlated with thermodynamic formation constants β, calculations concentrations using analyses. accuracy predicted taken verify model electroprecipitation.