在硝酸介质中,采用电解法将U(Ⅵ)电解还原制备U(Ⅳ)。电解装置如图1所示。电解槽的中间底部固定一圆片状渗透膜,渗透膜使电解过程中两极之间电解液不会相互渗透而电子可以转移,以维持电解过程正常运行。电解初期,在阴极形成U(Ⅴ),随后U(Ⅴ)歧化生成U(Ⅵ) In nitric acid medium, U (Ⅵ) was electrolytically reduced to prepare U (Ⅳ) by electrolysis. Electrolytic device shown in Figure 1. The middle of the cell is fixed at the bottom of a wafer-shaped permeable membrane, permeable membrane between the two electrolytes in the electrolyte will not penetrate each other and the electrons can be transferred to maintain the normal operation of the electrolysis process. At the beginning of electrolysis, U (Ⅴ) is formed on the cathode, then U (Ⅵ) is disproportionated to U (Ⅵ)