锡阴电极的制备及析氢性能的研究  

Preparation of tin cathode electrode and its properties in hydrogen evolution

作　　者：别汉波 宋宁[1] 俞小花[1] 和晓才[2,3] 俞双林 BIE Han-bo;SONG Ning;YU Xiao-hua;HE Xiao-cai;YU Shuang-lin(Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology, Kunming 650093,China;Kunming Metallurgical Research Institute,Kunming 650021,China;Chuang Neng Metal Fuel Battery Co.,Ltd.,Yunnan Metallurgical Group,Kunming 650031,China)

机构地区：[1]昆明理工大学冶金与能源工程学院,云南昆明650093 [2]昆明冶金研究院,云南昆明650021 [3]云南冶金集团创能金属燃料电池股份有限公司,云南昆明650031

出　　处：《现代化工》2018年第12期99-103,共5页Modern Chemical Industry

基　　金：云南省科技厅计划项目;铝空气电池用空气电极催化剂机理研究(2016FC004)

摘　　要：为了提高锡电结晶过电位,改善锡镀层表面形貌和制备较好的镀锡电极,通过电镀技术在室温条件下制备了不同电镀液条件下的锡镀层,运用线性伏安法、交流阻抗法和电势阶跃法等电化学方法和SEM技术研究了酸性镀锡体系中明胶对锡沉积的影响。阴极极化曲线和交流阻抗曲线表明,明胶能增大锡沉积反应的电荷传递内阻,提高锡电沉积过电位,延缓锡电沉积反应。电势阶跃表明,锡的电结晶过程遵循扩散控制瞬时成核和三维生长方式的结晶机理。SEM分析结果表明,添加明胶能使锡镀层光滑致密、晶粒细小。电极的极化曲线表明,镀锡电极能提高析氢电位,其中添加明胶所得的锡电极的析氢效果最好。In order to lift the crystallization overpotential of tin,improve the surface morphology of tin coating and prepare a better tin-plating electrode,tin coating is prepared through electroplating under the different electroplating solution conditions at room temperature. Effects of gelatin within acidic tin electroplating system on tin deposition are investigated by electrochemical methods such as linear voltammetry,AC impedance generation and potential step method,and SEM technique.The cathodic polarization curves and AC impedance curves show that Gelatin can increase the charge transfer resistance of tin deposition reaction,lift the overpotential of tin electrodeposition and delay reaction of tin electrodeposition.The potential step indicates that the electro-crystallization process of tin follows the mechanism of diffusion control,instantaneous nucleation and three-dimensional growth.SEM analysis shows that the addition of gelatin can make the tin coating smooth and compact with small grains. Polarization curves of electrode show that tin-plating electrode can increase hydrogen evolution potential and the hydrogen evolution exhibits better under the tin electrode with addition of gelatin.

关 键 词：电镀 锡 明胶 过电位 析氢电位 

分 类 号：TG115[金属学及工艺—物理冶金]