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本文研究了钴(Ⅱ)-丁二酮肟(DMG)在氨性底液(pH9)中极谱催化波的机理.用线性扫描伏安法、循环伏安法和阳极溶出法等方法证明,这催化波的形成是由于吸附在汞电极上的钴(Ⅱ)-丁二酮肟螯合物不可逆地还原到零价的“活性钴”,同时在电极表面的“活性钴”又催化了丁二酮肟的还原.
In this paper, the mechanism of polarographic catalytic wave of cobalt (Ⅱ) -diadione oxime (DMG) in ammonia solution (pH9) was studied. The results showed that the linear sweep voltammetry, cyclic voltammetry, The formation of this catalytic wave is due to irreversible reduction of the cobalt (II) -glyoxal-dioxazine chelate adsorbed on the mercury electrode to the zero-valent “active cobalt” and the “active cobalt” on the electrode surface in turn catalyzing the Reduction of diketone oxime.