石墨毡在以Ce^(3+)/Ce^(4+)为媒质的间接电化学合成反应中的电化学行为  

Electrochemical Behavior of Graphite Felt Electrodes in the Indirect Electrochemical Synthesis Reaction with Ce^(3+)/Ce^(4+)as the Medium

作　　者：王秀梅 杨凤娟 李照华 马新辉 庞龙 WANG Xiumei;YANG Fengjuan;LI Zhaohua;MA Xinhui;PANG Long(National Quality Supervision and Inspection Center for Aluminum and Aluminum Products,Sanmenxia 472000,China;College of Material and Chemical Engineering‚Zhengzhou University of Light Industry‚Zhengzhou 450001‚China)

机构地区：[1]国家铝及铝制品质量检验检测中心,河南三门峡472000 [2]郑州轻工业大学材料与化学工程学院,河南郑州450001

出　　处：《化学反应工程与工艺》2024年第5期445-451,共7页Chemical Reaction Engineering and Technology

基　　金：河南省科技厅科技攻关计划项目(202102210025)。

摘　　要：采用循环伏安法、恒电流电解法、扫描电镜和X射线能谱技术研究了石墨毡电极在以Ce^(3+)/Ce^(4+)为媒质的间接电化学合成反应中的电化学行为。结果表明:石墨毡电极对硫酸铈(Ⅲ)的氧化响应电流密度远超石墨和铅电极,并且电流密度会随石墨毡厚度的增加而增大。恒电流电解实验显示,在温度为27℃、电流密度为100 mA/cm^(2)、硫酸浓度为1.0 mol/L的情况下,电流效率达到95%。通过扫描电镜和X射线能谱仪分析结果得出,在27℃下电解30次后,石墨毡电极的表面形态未发生改变,电极表面仅存在碳元素和少量硫元素。石墨毡电极在工业生产中可大幅提高间接电化学合成反应的时空产率,达到降低能耗的效果,同时具有极佳的使用寿命。The electrochemical behavior of graphite felt electrodes in the indirect electrochemical synthesis reaction with Ce^(3+)/Ce^(4+)as the medium was investigated by cyclic voltammetry,constant current electrolysis,scanning electron microscopy and X-ray energy spectroscopy techniques.The results showed that the oxidation response current density of graphite felt electrodes to cerium sulfate(Ⅲ)was much higher than that of graphite and lead electrodes,and the current density increased with the increase of the thickness of graphite felt.The constant current electrolysis experiments showed that under the conditions of 27℃,high current density of 100 mA/cm^(2),and sulfuric acid concentration of 1.0 mol/L,the current efficiency could reach more than 95%.It was concluded by scanning electron microscopy and X-ray energy spectrometer that after 30 times of electrolysis at 27℃,the surface morphology of graphite felt electrodes remained stable and unchanged,and there were only carbon elements and a small amount of sulfur elements on the electrode surface.Graphite felt electrodes can greatly improve the space-time yield of indirect electrochemical synthesis reaction in industrial production,achieve the effect of reducing energy consumption,and have an extremely high service life.

关 键 词：石墨毡电极 石墨电极 电流效率 比表面积 稳定性 

分 类 号：O646.5[理学—物理化学]