应用电化学第一章电化学基础研讨.pptVIP

Chapter 1   电化学基础;教学目的 在《物理化学》课程基础上，加深对电化学基本概念和基本原理的理解 通过电化学原理的学习，增强分析问题能力 基本内容与要求（知识点） 电化学基本概念 电化学热力学 不可逆电极过程 电化学极化和浓度极化 课外自学 吸附；电催化;电化学研究对象 ;电化学反应特征 ;1.1??Fundamental concepts 1.2 Electrical double layer 1.3 Irreversible electrode processes 1.4 Electron transfer and electrochemical polarization 1.5 Mass transport and concentration polarization;1?? Basic electrochemical devices2 Some common types of electrode processes 3 Electronic conductors and ionic conductors 4. Faraday’s laws of electrolysis5. Electromotive force and Electrode potential ; 1.1.1?? Basic electrochemical devices (Electrochemical reactors) Two kinds of electrochemical devices: Galvanic cell （原电池） Electrolytic cell（电解池） The basic components of cells: anode（阳极） cathode（阴极） electrolyte （电解质）;Anode: positive charge from electrode into solution (oxidation) Cathode: positive charge from solution to electrode (reduction) ; Electrode: working electrode (WE) 工作电极 A counter electrode (CE) 对电极 B reference electrode (RE) 参比电极 C问题;1.1.2 Some common types of electrode processes ;1.1.3 Electronic conductors  and ionic conductors ;(2) Ionic conductors (the second conductors) Electrolyte: A substance present in solution or in a melt which is at least partly in the form of charged species----ions. Properties of electrolytic solution (see pp 51-54 ) a)?? Electric migration and transport number Electric migration（电迁移）: the movement of charged species due to a potential gradient （电位梯度） ;Ionic mobility（离子淌度）: the speed of ions under a unit field strength, m2s-1V-1 Transport number ti（迁移数）: the fraction of the current carried by the ion i ti=Qi/∑Qi=Ii/∑Ii supporting electrolyte(foreign electrolyte)（支持电解质或局外电解质） ; b)? Conductance and conductivity Conductance （电导） ; c) Activity and activity coefficient activity（活度）