钨酸根离子在银、金电极上的电化学行为研究

Electrochemical behavior of tungstate ion on gold and silver electrode

摘要: 在电化学工作站中以三电极体系研究WO₄^2-在金、银电极上的电化学行为. 结果表明：298 K时，在0.05 mol/L Na₂WO₄的水溶液体系，研究分析知钨酸根离子在银、金电极上的电化学还原过程不可逆，计算得出钨酸根离子在银、金电极上的转移电子数分别为3、4. 以银作阴电极，溶液中钨酸根离子发生WO₄^2-+2e→WO₃^2-+O和WO₃^2-+e→WO₂^-+O电化学反应；以金作阴电极，溶液中钨酸根离子发生WO₄^2-+2e→WO₃^2-+O和WO₃^2-+2e→WO₂^2-+O电化学反应.

Abstract: Electrochemical behaviors of tungstate ion on gold, silver electrode were studied by three-electrode system in electrochemical workstation. The results show that WO₄^2- electrochemical reduction process is irreversible on silver and gold electrode in 0.05 mol/L Na₂WO₄ aqueous system at 298 K. The numbers of transferred electrons of WO₄^2- on silver and gold electrode are 3 and 4, respectively. The reactions of tungstate ion on silver eletrode are WO₄^2-+2e→WO₃ ^2-+O and WO₃ ^2-+e→WO₂ ^- +O, while WO₄^2-+2e→WO₃^2-+O and WO₃ ^2-+2e→WO₂^2-+O are on gold electrode.