节能型Al基/TiB2/Mn、Pb、La系氧化物涂层电极制备与性能的应用基础研究

项目名称： 节能型Al基/TiB2/Mn、Pb、La系氧化物涂层电极制备与性能的应用基础研究

项目编号： No.51264025

项目类型： 地区科学基金项目

立项/批准年度： 2013

项目学科： 矿业工程

项目作者： 竺培显

作者单位： 昆明理工大学

项目金额： 48万元

中文摘要： 电极是湿法电解（电积）中的关键材料，电极材料的选择和制备是湿法冶金工业的难题之一。本项目将从电极材料的选择和结构设计入手，提出以导电好、耐蚀强的TiB2包铝为基体，以Mn、Pb、La氧化物为活性涂层的新型电极结构设计方案。探讨合成过程、界面结合状态以及演变行为对电极反应的影响规律。考察涂层成分配比与电极性能的关系，并结合晶体结构学、电化学动力学，研究涂层的组织结构、固溶关系、晶粒大小、表面粗糙度等微观因素对电极的动力学参数、循环伏安特性、表面分形维数等的影响关系，揭示材料界面形成机制、涂层微观结构对提升电极催化活性、延长使用寿命的作用机理。利用电极过程动力学、电化学热力学，研究Al/TiB2基体材料的电子传输方式、转移机制和电子逸出功的改变对阳极过程电极电势、反应速度的影响规律，弄清基体材料性质的改变与电极极化电位负移，实现节能降耗的关键因素和作用规律。

中文关键词： 层状材料；Al基复合电极材料；金属陶瓷；TiB2中间层；低能耗和高产出

英文摘要： It is recognized that the electrode has been the key material in hydrometallurgy, but the choice and preparation of electrode material is a difficult problem in hydrometallurgy industry. In this project, from the point of view of the selection and structural desigin of electrode material, the new design proposal of electrode structure is presented that the aluminum coated with TiB2 is selected as the substrate material and the oxide Mn, Pb and La is selected as active coating. It is discussed that the substrate material is on the influences of the manufacturing process, the bonding condition of the interface and the microstructure evolution on the electrode reaction. The relationship between the coating composition and electrode performance is studied, meanwhile, based on the theory of thermodynamics and electrochemical kinetics, it is carried on sutudy that the micro-factors such as the coating composition, their solid solubility, grain size, surface roughness et al. is impact on the properties of surface fractal dimension, electrochemical kinetics and cyclic voltammetry. It is revealed that the effect of the formation mechanism of interface and the microstructure of coating is mechanism of action on the improvement of catalytic activity and the increase of service life. Based on the theory of the electrode pro

英文关键词： Stratified material；Al based composite electrode material；Metal ceramic；TiB2 intermediate layer；Lower energy consumption and higher output