Ti/RuO_(2)-IrO_(2)网状阳极电催化析氯性能  

Electrocatalytic chlorine evolution performance of Ti/RuO_(2)-IrO_(2)mesh anode

作　　者：刘雪梅[1,2] 耿嘉锋[1,2] 廖栋才 白波 LIU Xuemei;GENG Jiafeng;LIAO Dongcai;BAI Bo(School of Water and Environment,Chang′an University,Xi′an 710054,Shaanxi Province,China;Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region,Xi′an 710054,Shaanxi Province,China)

机构地区：[1]长安大学水利与环境学院,陕西西安710054 [2]旱区地下水文与生态效应教育部重点实验室,陕西西安710054

出　　处：《化学工程》2023年第9期61-65,77,共6页Chemical Engineering(China)

基　　金：陕西省自然科学基金资助项目(2021SF-497);中央高校基本科研业务费专项资金资助项目(300102291403,300102291727,300102292107)。

摘　　要：开发高效和高选择性催化剂是工业电催化NaCl生产活性氯的关键。采用三电极体系研究不同目数(20、40、80、100)网状阳极DSA(尺寸稳定阳极)(Ti/RuO_(2)-IrO_(2))的析氯性能,并通过COMSOL模拟电流密度分布的变化规律。结果表明:DSA-80具有最高的析氯活性,在1.175 V(Ag/AgCl为参比电极)电压下获得113.60 mA/cm^(2)的电流密度和较小的塔菲尔斜率(28.09 mV/dec)。DSA的析氯活性随着网格目数的增加而不断增长,目数增加到100时析氯活性下降,这种现象源于不同目数电极的活性表面积差异。结合COMSOL仿真电解过程,电流密度分布的模拟和实验结果趋势一致,电流集中于电极边缘促进氯气析出。为提高工业可用电极电催化制氯性能提供重要参考。The development of efficient and highly selective catalysts is the key to producing active chlorine in industrial electrocatalytic NaCl.The chlorine evolution performance of reticulated electrodes DSA(dimension stable anode)(Ti/RuO_(2)-IrO_(2))with different mesh numbers(20,40,80,100)was investigated by using a three-electrode system,and the variation pattern of current density distribution was simulated by COMSOL.The results show that DSA-80 has the highest chlorine evolution activity,obtaining a current density of 113.60 mA/cm^(2)and a small Tafel slope(28.09 mV/dec)at 1.175 V(Ag/AgCl as reference electrode).The chlorine evolution activity of the DSA mesh grows with the increase of mesh number,however,it decreases when the mesh number increases to 100.This phenomenon originates from the difference in the active surface area of electrodes with different mesh numbers.Combined with the COMSOL simulation of electrolysis process,the simulation results of current density distribution are consistent with the experimental results,while the current is concentrated at the edge of the electrode to promote the chlorine evolution.An important reference is provided for improving the electrocatalytic chlorine production performance of industrially available electrodes.

关 键 词：网状电极 网格目数 析氯反应 COMSOL仿真 

分 类 号：TQ151[化学工程—电化学工业]