电解质溶液对EMD电化学行为的影响

Effects of electrolyte solution on electrochemical behavior of EMD

采用微电极研究了电解二氧化锰(EMD)在不同中性电解质溶液中的电化学行为,结果表明:EMD在MgSO4溶液中有特殊的电化学特性,Mg2+对EMD的氧化还原过程有影响。循环伏安初期,在-0.15 V处有1个还原峰,在0.50 V和1.00 V处有2个氧化峰。经过5次循环以后,在0.20 V处出现1个新的氧化峰。XRD图谱证实,EMD在MgSO4溶液中的还原过程有物相变化。

Electrochemical behavior of electrolytic manganese dioxide（EMD） in different neutral electrolyte solutions was studied by microelectrode. The results showed that EMD had special electrochemical performance in MgSO4 solution, the redox process of EMD was influenced by Mg^2＋ . There was a reduction peak at - 0.15 V, two oxidation peaks at 0.50 V and 1.00 V in the initial cyclic vohammetry curve. A new oxidation peak appeared at 0.20 V after 5 cycles. XRD patterns showed that the reduction process of EMD had phase change in MgSO4 solution.