电化学法研究立方体纳米氧化亚铜的热力学函数  

Thermodynamic Function of Cube Nano Cuprous Oxide by Electrochemical Method

作　　者：覃方红 钟婧晗 肖碧源 贺子君 邱江源 黄在银 QIN Fang-hong;ZHONG Jing-han;XIAO Bi-yuan;HE Zi-j un;QIU Jiang-yuan;HUANG Zai-yin(College of Chemistry and Chemical Engineering ,Guangxi University for Nationalities ,Nanning530008,China)

机构地区：[1]广西民族大学化学化工学院,广西南宁530008

出　　处：《化学与生物工程》2018年第12期20-23,共4页Chemistry & Bioengineering

基　　金：国家自然科学基金项目(21273050;21573048);广西研究生教育创新计划项目(gxun-chxzs2018062)

摘　　要：采用湿化学还原法可控制备了立方体纳米Cu2O,利用扫描电镜(SEM)、X-射线粉末衍射仪(XRD)对其物相、形貌进行了表征;采用电化学法测定了纳米Cu2O电极与块体Cu2O电极组成的可逆电池的电动势;以块体Cu2O作为比较标准,结合电化学理论及热力学关系式,获取了纳米Cu2O的规定热力学函数(标准摩尔生成焓、标准摩尔熵、标准摩尔生成Gibbs自由能)及表面热力学函数。结果表明,在298.15K时,纳米Cu2O的摩尔表面焓为58.04kJ·mol^(-1)、摩尔表面Gibbs自由能为0.50kJ·mol^(-1)、摩尔表面熵为192.77J·mol^(-1)·K-1。We controllably prepared cube nano cuprous oxide by a wet chemistry reduction method , andcharacterized its phase and morphologybySEM and XRD.Furthermore , we measured the electromotive force ofthe reversible cell composed of nano cuprous oxide electrode and bulk cuprous oxide electrode by an electro -chemical method.Using bulk cuprous oxide as a comparative standard, we obtained the specified thermodynamicfunctions ( standard molar enthalpy of formation , standard molar entropy , and standard molar Gibbs free energyof formation ) and the surface thermodynamic functions of nano cuprous oxide by electrochemistry theory andthermodynamic equations.The results show that the molar surface enthalpy , the molar surface Gibbs free energy , and the molar surface entropy of nano cuprous oxide are 58.04kJ · mol^-1 ,0.50kJ · mol^-1 ,and 192.77J ·mol^-1 · K -1at 298.15K , respectively.

关 键 词：电化学 CU2O 热力学函数 

分 类 号：O642[理学—物理化学]