氯化胆碱-尿素低共熔溶剂中电化学制备镍钴合金  

Electrochemical Preparation of Nickel-cobalt Alloys in Choline Chloride-urea Eutectic Solvent

作　　者：王江飞 胡常斌 张启航 余杰 何世伟 WANG Jiangfei;HU Changbin;ZHANG Qihang;YU Jie;HE Shiwei(Jinchang Pump Xinwangda Environmental Protection Technology Co.,Ltd.,Jinchang 737100,China;School of Metallurgical Engineering,Anhui University of Technology,Maanshan 243000,China)

机构地区：[1]金昌泵鑫旺达环保科技有限公司,甘肃金昌737100 [2]安徽工业大学冶金工程学院,安徽马鞍山243000

出　　处：《有色金属(中英文)》2025年第3期425-431,共7页Nonferrous Metals

基　　金：国家自然科学基金资助项目(51904005)。

摘　　要：在80℃条件下,摩尔比为1:2的氯化胆碱-尿素低共熔溶剂中,研究不同浓度Ni^(2+)的电化学行为及动力学参数。选取电位-0.93 V (vs.Ag/AgCl)进行阻抗测试,发现R_(ct)随着溶液中镍离子浓度增加,呈现下降趋势。用RDE测量不同转速下的LSV曲线。采用Koutecky-Levich方程计算动力学参数得到扩散系数(D)。扩散系数随着Ni^(2+)浓度增加逐渐增大。浓度为0.08 mol/L时,扩散系数最小,为4.344×10^(-8) cm^(2)/s。以铜片为基底,沉积电位为-1.2V(vs.Ag/AgCl),时间为1h,制备不同比例Ni-Co合金镀层。镀层表面均出现了球形菜花状颗粒,线性拟合后得到镍的使用效率约为70%。The electrochemical behavior and kinetic parameters of different concentrations of Ni^(2+)were studied in a choline-urea chloride eutectic solvent with a molar ratio of 1∶2 at 80℃.The impedance test was carried out with the potential of-0.93 V(vs.Ag/AgCl).It is found that Rct show a decreasing trend with the increase of nickel ion concentration in the solution.The LSV curves at different rotational speeds were measured with RDE.The diffusion coefficient(D)was obtained by calculating the kinetic parameters using the Koutecky-Levich equation.The diffusion coefficient gradually increased with the increase of Ni^(2+)concentration.At a concentration of 0.08 mol/L,the minimum diffusion coefficient is 4.344×10^(-8) cm^(2)/s.Using copper sheets as the substrate,a deposition potential of-1.2 V(vs.Ag/AgCl)for a duration of 1 hour was employed to prepare Ni-Co alloy coatings in different proportions.Spherical cauliflower-like particles appeared on the surface of the coating,and the nickel availability was about 70%after linear fitting.

关 键 词：低共熔溶剂 电化学行为 镍钴合金 电沉积 

分 类 号：TQ153.11[化学工程—电化学工业]