(1. 昆明理工大學(xué) 分析測(cè)試研究中心 云南省分析測(cè)試中心，昆明 650093；
2. 云南冶金集團(tuán)總公司，昆明 650051；
3. 昆明理工大學(xué) 材料與冶金學(xué)院，昆明 650093)
摘 要: 采用線性掃描伏安技術(shù)、交流阻抗技術(shù)和計(jì)時(shí)電流法研究鍺在鋅電沉積過程中的電化學(xué)行為，結(jié)合Zn-H2O系和Ge-H2O系E—pH圖從熱力學(xué)角度進(jìn)行分析。結(jié)果表明：鍺會(huì)削弱鋅電沉積陰極極化，且隨著電解液中鍺濃度的增加，去極化作用增強(qiáng)，而且鍺會(huì)引起電荷傳遞電阻的降低，改變鋅電沉積電荷傳遞步驟，加劇氫還原反應(yīng)的發(fā)生。
關(guān)鍵字: 鍺；鋅電沉積；電化學(xué)行為；E—pH圖
（1. Research Center for Analysis and Measurement, Kunming University of Science and Technology,
Center for Analysis and Measurement of Yunnan Province, Kunming 650093, China;
2. Yunnan Metallurgy Group Parent Company, Kunming 650031, China;
3. Faculty of Material and Metallurgy Engineering, Kunming University of Science and Technology,
Kunming 650093, China）
Abstract:The electrochemical behavior of germanium in zinc deposition from acidic electrolytes was investigated by using electrochemical techniques such as linear cyclic voltammetry technology, electrochemical impedance spectroscopy and chronoamperometry, and E—pH equilibrium diagram of Zn-H2O system and Ge-H2O system was analyzed based on the thermodynamics. The results show that germanium can decrease cathodic polarization of zinc deposition, and the depolarization heightens with increasing germanium concentration in acidic electrolytes. And it is important that germanium can reduce charge transfer resistance, change charge transfer step of zinc deposition, and stimulate hydrogen evolution reaction.
Key words: germanium; zinc deposition; electrochemistry behavior; E—pH equilibrium diagram
