(1. 蘭州交通大學 環(huán)境與市政工程學院，蘭州 730070；
2. 蘭州交通大學 寒旱地區(qū)水資源綜合利用教育部工程研究中心，蘭州 730070)
摘 要: 針對傳統(tǒng)氯化鈷電沉積工藝陽極產(chǎn)氯的缺陷，采用雙膜三室電解槽進行電沉積鈷。通過測定各隔室中的電解液成分變化深入研究電沉積過程的離子傳輸行為。結(jié)果表明：在電場與濃度梯度作用下，陰極液的氯離子與陽極液的氫離子可經(jīng)電遷移與擴散進入中隔室形成鹽酸，鹽酸濃度可達1 mol/L；并同時阻止陽極析氯，實現(xiàn)產(chǎn)酸抑氯同步化。
關(guān)鍵字: 鈷；電沉積；離子交換膜電解槽；離子傳輸
（1. School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China;
2. Engineering Research Center of Water Resource Comprehensive Utilization in Cold and Arid Regions,
Ministry of Education, Lanzhou Jiaotong University, Lanzhou 730070, China）
Abstract:Based on the evolution of chlorine gas at the anode in the traditional electrowinning process of cobalt chloride, the electrodeposition of cobalt was carried out in the double-membrane three-compartment electrolytic cell. The composition changes of electrolyte in three compartments were tested as function of time to study ion transport in the electrodeposition process deeply. The results show that chloride ions are able to migrate and diffuse from the catholyte to the middle solution by the electric field and concentration gradient; similarly, protons are also able to migrate and diffuse from the anolyte to the middle solution. Hence hydrochloric acid forms electrochemically up to 1mol/L, simultaneously obtaining oxygen evolution reaction instead of chlorine evolution at the anode. The production of acid is synchronized with the inhibition of chlorine evolution.
Key words: cobalt; electrodeposition; ion-exchange membrane electrolytic cell; ion transport
