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采用电化学石英晶体微天平(EQCM)技术,准确区分锰沉积过程中锰沉积和析氢反应的电位范围,然后采用传统三电极循环伏安技术和组分逐步添加的方式,考察氨水(NH_3·H_2O)、亚硫酸铵((NH_4)_2SO_3)和二氧化硒(SeO_2)等添加剂在单纯的硫酸铵((NH_4)_2SO_4)电解质溶液中对析氢反应的影响以及在同时含有硫酸锰(MnSO_4)和(NH_4)_2SO_4的电解质体系中对析氢和锰沉积反应的共同影响和作用机制.结果表明:(NH_4)_2SO_3可以显著促进锰沉积,但抑制析氢的作用不显著;NH_3·H_2O和SeO_2抑制析氢和促进锰沉积的作用均十分显著.
The electrochemical quartz crystal microbalance (EQCM) technique was used to accurately distinguish between the potential range of manganese deposition and hydrogen evolution reaction during the deposition of manganese. Then the traditional three-electrode cyclic voltammetry and stepwise addition of components were used to investigate the effect of ammonia water (NH 3 · H 2 O ), Ammonium sulfite ((NH 4) 2 SO 3) and selenium dioxide (SeO 2) in pure ammonium sulfate ((NH 4) 2 SO 4) electrolyte solution, and the effect of the addition of MnSO 4 and NH_4) _2SO_4 in the electrolyte system. The results show that: (NH_4) _2SO_3 can significantly promote the deposition of manganese, but the effect of hydrogen evolution is not significant; NH_3 · H_2O and SeO_2 can inhibit the hydrogen evolution and promote the hydrogen evolution The role of manganese deposition are very significant.