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为加大钨钼电化学性质的差异实现钨钼分离,使钨钼形成钨磷、钼磷杂多酸,采用循环伏安法研究酸性条件下含钨钼溶液及钨磷、钼磷杂多酸的电化学行为,获得多种溶液体系的循环伏安曲线.结果表明,研究体系中钨的还原电位较钼高,但二者电位差小于0.1V,无法利用电化学性质差异高效分离;而将钨和钼形成杂多酸体系后,钼磷杂多酸还原峰电位为0.401V,钨磷杂多酸为0.1949V,加入磷酸增大了钨钼离子电位差,可优先将钼还原.
In order to increase the difference of the electrochemical properties of tungsten and molybdenum to achieve separation of tungsten and molybdenum, tungsten and molybdenum to form tungsten and phosphorus, molybdenum and phosphorus heteropoly acid, the use of cyclic voltammetry under acidic conditions containing tungsten and molybdenum solution and tungsten phosphorus, molybdenum phosphorus heteropoly acid The results showed that the reduction potential of tungsten was higher than that of molybdenum in the research system, but the potential difference between the two was less than 0.1V and could not be separated efficiently by using the electrochemical properties. After the heteropolyacid system was formed by tungsten and molybdenum, the reduction peak potential of molybdenum-phosphorus heteropoly acid was 0.401V, the heteropoly acid of tungstophosphoric acid was 0.1949V, and the addition of phosphoric acid increased the potential difference of tungsten-molybdenum ions, and the molybdenum reduction preferentially.