【摘要】 提出了一种在氢氧化钾溶液中使用碘化钾添加剂直接电合成固态高铁酸钾的方法,使用CV、EDX、FT-IR和SEM等手段对铁电极和高铁酸钾样品进行表征。结果表明,在65℃可以得到最高电流效率(76.6%),产品纯度为95.3%~97.8%,高铁酸钾质量浓度为66 g/L;在保持电流效率为63%以上的条件下,可将电流密度从2.5 mA/cm2提高到4.5 mA/cm2,与空白样品相比提高了80%。EDX和IR检测表明,使用添加剂所得到的样品不含碘,与空白样品相比其晶体外貌为较长的多面体。更多还原

【Abstract】 A new method for direct electrosynthesis of solid potassium ferrate(K2FeO4) in KOH solution using potas-sium iodide(KI) as additive was put forward.Fe electrode and K2FeO4 sample were characterized by means of CV,EDX,IR,and SEM etc..Results showed that using the additive during synthesis could result in the highest current efficiency of 76.6%,product purity of 95.3%~97.8%,and a yield of 66 g/L K2FeO4 at 65 ℃;and the current density could be enhanced from 2.5 mA/cm2 to 4.5 mA/cm2,which is 80% higher than that of the blank sample when keeping current efficiency over 63%.EDX and IR results indicated K2FeO4 sample obtained by using additive contained little iodine and appeared longer polyhedron in shape than that of the blank sample.更多还原