草酸改性Ti电极用于电化学还原CO_(2)制甲醇  

Oxalic acid modified Ti electrode used in preparing methanol by electrochemical reduction CO_(2)

作　　者：古铭岚 苏永庆[1] 代灵英 王晗雪 张咪 GU Ming-lan;SU Yong-qing;DAI Ling-ying;WANG Han-xue;ZHANG Mi(Faculty of Chemistry & Chemical Engineering,Yunnan Normal Univesity,Kunming 650500,China)

机构地区：[1]云南师范大学化学化工学院,云南昆明650500

出　　处：《应用化工》2022年第4期1009-1014,共6页Applied Chemical Industry

基　　金：国家自然科学基金项目(21763034)。

摘　　要：大气中CO_(2)浓度的大幅度增加,导致了严重的环境问题,而电化学还原CO_(2)是减缓CO_(2)浓度的一种有效方法。Ti电极经草酸腐蚀和热处理的改性后,原来光滑的微观表面出现了凹陷和孔洞,极大地增加了微观表面积和对CO_(2)电化学还原的反应活性。草酸改性Ti电极作为阴极用于CO_(2)在0.5 mol/L的KHCO_(3)溶液中的还原中,在电解电压为-1.4 V_(vs.SCE),电解时间3 h,产物甲醇的法拉第效率可达45.83%,且电极稳定。The substantial increase of CO_(2) concentration in the atmosphere has led to serious environmental problems,and electrochemical reduction of CO_(2) is an effective method to slow down CO_(2) concentration.After Ti electrode was modified by oxalic acid etching and was heat treated.The original smooth microscopic surface of Ti electrode became depressions and holes.It greatly increased the microscopic surface area and the reaction activity to electrochemical reduction CO_(2).When Ti electrode modified by oxalic acid was used as cathode in CO_(2) electrochemical reduction in 0.5 mol/L KHCO_(3) solution,the Faraday efficiency of methanol product was up to 45.83%as the electrolytic voltage was-1.4 V_(vs.SCE) and the electrolytic time was 3 h,the electrode was stable.

关 键 词：Ti电极 草酸 改性 CO_(2) 甲醇 电化学还原 

分 类 号：TQ15[化学工程—电化学工业]