(浙江工业大学 材料科学与工程学院，杭州 310014)
摘 要: 采用CHI660A电化学工作站测定了As(Ⅲ)盐酸体系中扫描伏安曲线和阴极极化曲线，研究了柠檬酸铵与Sb(Ⅲ)对阴极反应动力学参数nα值和表观活化能的影响。结果表明：柠檬酸铵的加入，不仅使AsH3还原的传递系数nα值降低，抑制AsH3的析出，同时，还降低了As(Ⅲ)还原为As的传递系数，升高反应的表观活化能，阻碍了砷的还原。而Sb(Ⅲ)的加入不仅抑制了AsH3的析出，而且增大了As(Ⅲ)还原为As的nα值，降低表观活化能，即Sb(Ⅲ)的加入促进单质As的还原。
关键字: 电沉积；砷化氢；柠檬酸铵；锑；动力学
（College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, China）
Abstract:The sweep voltammetry curves and cathodic polarization curves of As(Ⅲ) hydrochloric acid system were measured by CHI660A electrochemical workstation. The effects of ammonium citrate and Sb(Ⅲ) on the kinetics parameters nα and apparent activation energy of As(Ⅲ) reduction were investigated. The results show that the addition of ammonium citrate reduces the transfer coefficient of arsine reduction and suppresses the evolution of arsine. However, the transfer coefficient of arsenic reduction also decreases and the apparent activation energy for arsenic reduction increases, i.e. the addition of ammonium citrate will inhibit the arsenic reduction. The addition of Sb(Ⅲ) suppresses the evolution of arsine and increases transfer coefficient of arsenic reduction remarkably. Meanwhile, the apparent activation energy reduces. The addition of Sb(Ⅲ) can promote the reduction of arsenic.
Key words: electrodeposition; arsine; antimony; ammonium citrate; kinetics
