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本文报道了用不同方法测得的 Ag-AgNO_3-NH_3-吡啶甲酸体系的交换电流值.探讨了产生较大差异的原因,并得出银从上述体系中电积时,在低过电位区的速率控制步骤是吸附离子的表面扩散.
In this paper, the exchange current values of Ag-AgNO_3-NH_3-picolinic acid system measured by different methods were reported. The reason for the large difference was discussed. It is concluded that when silver is electrowinned from the above system, The rate control step is surface diffusion of adsorbed ions.