物理化学学报 >> 2002, Vol. 18 >> Issue (10): 956-960.doi: 10.3866/PKU.WHXB20021019

研究简报 上一篇    

Na2SeO3在Fe电极上还原和吸附机理

符德学;缪绢;王云燕;舒余德   

  1. 焦作大学化学工程系，焦作　454100;焦作工学院，焦作 454100;中南大学冶金科学与工程系，长沙　410083
  • 收稿日期:2002-01-15 修回日期:2002-04-18 发布日期:2002-10-15
  • 通讯作者: 缪绢 E-mail:miaojuan@jzit.edu.cn

Mechanism of Na2SeO3 Reduction and Adsorption on Fe Electrode

Fu De-Xue;Miao Juan;Wang Yun-Yan;Shu Yu-De   

  1. Department of Chemical Engineering, Jiaozuo University, Jiaozuo　454100;Jiaozuo Technology College, Jiaozuo 454100;Department of Metallurgical Science and Engineering, Central South University, Changsha　410083
  • Received:2002-01-15 Revised:2002-04-18 Published:2002-10-15
  • Contact: Miao Juan E-mail:miaojuan@jzit.edu.cn

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摘要： 采用循环伏安法、恒电势电解法、恒电流阶跃法及交流阻抗法研究Na2SeO3提高锌锰合金电沉积电流效率的作用机理.证明在锌锰合金电沉积的条件下，Na2SeO3 阴极被还原为Se32－并吸附在阴极表面上，从而阻止了氢原子在阴极表面的吸附，因而减少了氢离子的阴极还原.拟定了Na2SeO3的反应和吸附机理，用交流阻抗法进一步证明了所拟机理的正确性.

关键词: Na2SeO3, 还原和吸附, 机理

Abstract: It is found by experiment that Na2SeO3 can improve the current efficiency remarkably. The reaction mechanism of the promotion of the current efficiency of electro-deposition of Zn-Mn alloy by the addition of Na2SeO3 to the cathode has been studied by cyclic voltammetry, linear sweep voltammetry, chronopotentiometry and electro-chemical impedance methods. It is found that under the conditions of Zn-Mn alloys electro-deposition, Na2SeO3 is reduced to Se32－, which is adsorbed on the surface of cathode, because of the adsorption of Se32－, the adsorption of H is prevented, the partial potential curve of hydrogen moves to negative region about 0.2 V in the presence of 0.1 g•L－1 Na2SeO3.

Key words: Na2SeO3, Reduce and adsorption, Mechanism