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测定了铂上电沉积二氧化锰薄层电极在不同KOH浓度,不同扫描速度、以ZnO饱和等条件下的动电位扫描曲线,结果与石墨上电沉积二氧化锰薄层电极类似。不进入第二放电阶段或阻碍了第二阶段放电的进行时,二氧化锰电极有一定的可充电性。这是二氧化锰本身特性。初步分析了Mn_3O_4的形成机理对可充电性的影响,讨论了化学反应形成机理的依据及存在问题,并与McBreen的电极还原形成机理进行比较.有ZnO时,对二氧化锰的可充电性的影响更为剧烈。也测定了3MNH_4Cl及饱和的3NH_2SO_4溶液中的动电位扫描曲线,结果与石墨上电沉积的情形大致相同。
The potentiodynamic scanning curves of the electrodeposited manganese dioxide electrodeposited on platinum electrode at different KOH concentration, different scanning speed and saturated with ZnO were measured. The results were similar to that of graphite electrodeposited manganese dioxide thin electrode. The manganese dioxide electrode has a certain chargeability without entering the second discharge stage or hindering the second stage discharge. This is the nature of manganese dioxide itself. The formation mechanism of Mn_3O_4 was analyzed preliminarily on the chargeability, the basis and existing problems of the formation mechanism of the chemical reaction were discussed, and the formation mechanism of the electrode was also compared with that of McBreen.When ZnO was used, the chargeability of Mn_3O_4 The impact is more intense. The potentiodynamic scanning curves in 3MNH_4Cl and saturated 3NH_2SO_4 solutions were also determined. The results were approximately the same as those of graphite electrodeposition.