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用循环伏安法和电位阶跃法研究了LiCl-KCl-NaCl熔盐体系中碳的阴极还原机理。在钨、铂、不锈钢等微电极上得到的伏安图表明碳的还原是由CO_3~(2-)离子经一步电化学反应实现的,电极反应速度控制步骤为CO_3~(2-)离子向阴极的扩散过程,还原过程具有反应物吸附特征。碳在W、Pt、不锈钢电极上析出电位分别为-2.05V、-1.745V和-1.90V(均相对于Ag/AgCl参比电极)。
The cathodic reduction mechanism of carbon in LiCl-KCl-NaCl molten salt system was studied by cyclic voltammetry and potential step method. The voltammograms obtained on tungsten, platinum, stainless steel and other microelectrodes showed that the reduction of carbon was achieved by one-step electrochemical reaction of CO_3 ~ (2-) ions, and the electrode reaction rate control step was CO_3 ~ (2-) Cathode diffusion process, the reduction process has a reactant adsorption characteristics. Carbon deposition potential on W, Pt, stainless steel electrodes was -2.05 V, -1.745 V and -1.90 V, respectively (all relative to Ag / AgCl reference electrode).