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将细粒闪锌矿压入热固结石墨聚合物基体中 ,便制成可重复使用的用于电化学动力学测量的电极。在闪锌矿电极被Pb 活化后 ,采用循环伏安法测量乙基钾黄药加入前后的伏安曲线。将所得到的阳极曲线和阴极曲线与文献中的伏安曲线、石墨电极的“洗提 (stripping)”分析结果、方铅矿的行为和被Cu 活化的闪锌矿电极的行为进行了比较。结果表明 ,吸附在闪锌矿表面上的Pb 以简单离子形态存在 ,其行为与在其还原和以离子交换与乙基黄药反应的Pb(OH) 2 类似
Pressing fine-grained sphalerite into a thermosetting graphite polymer matrix produces a reusable electrode for electrochemical kinetic measurements. After the sphalerite electrode was activated by Pb, the voltammetry curve of ethylpotassium xanthate before and after addition was measured by cyclic voltammetry. The resulting anodic and cathodic curves were compared with the voltammetric curves in the literature, the “stripping” analysis of the graphite electrodes, the behavior of galena and the behavior of the Cu-activated sphalerite electrode. The results show that Pb adsorbed on the surface of zinc blende exists in simple ionic form and behaves in a similar manner to Pb (OH) 2 in its reduction and ion exchange with ethyl xanthate