聚合工艺对聚吡咯改性石墨毡电极结构及其氧还原性能的影响  

Effect of polymerization process on structure and oxygen reduction activity of polypyrrole coated graphite felt electrode

作　　者：郭华珍 唐思扬 钟山 吴潘[1] 蒋炜[1] 吴可荆 刘长军[1] 鲁厚芳[1,2] 梁斌 GUO Hua-zhen;TANG Si-yang;ZHONG Shan;WU Pan;JIANG Wei;WU Ke-jing;LIU Chang-jun;LU Hou-fang;LIANG Bin(School of Chemical Engineering,Sichuan University,Chengdu 610207,China;Institute of New Energy and Low-Carbon Technology,Sichuan University,Chengdu 610207,China)

机构地区：[1]四川大学化学工程学院,四川成都610207 [2]四川大学新能源与低碳技术研究院,四川成都610207

出　　处：《应用化工》2023年第1期1-7,共7页Applied Chemical Industry

基　　金：国家自然科学基金(21878190)。

摘　　要：对石墨毡进行电化学聚合吡咯改性,考察聚合时间、脉冲次数和间隔时间对聚吡咯改性石墨毡电极形貌结构和电化学性能的影响。结果表明,通过聚合脉冲时间、脉冲次数和脉冲间隔时间可以调控聚吡咯涂层的厚度、形貌和亲水性。在聚合脉冲时间为100 s、间隔时间为120 s,脉冲次数为10次的条件下,得到的聚吡咯改性石墨毡电极的2电子氧还原活性最高,其电化学活性比表面积最大,达到1.5028 cm^(2)/cm^(3),在pH=3的硫酸钠溶液中,其H_(2)O_(2)累积速率最大,为25.775 mol/(m^(3)石墨毡·h),是未改性石墨毡上H_(2)O_(2)累积速率的3.17倍。The graphite felt was modified by electrochemical polymerization of pyrrole.The effects of polymerization pulse time,pulse number and pulse interval time on the morphology and electrochemical properties of polypyrrole-coated graphite felt were investigated.The results show that the polypyrrole coating can be tuned by the polymerization pulse time,pulse number and pulse interval time.The coating of polypyrrole can also improve the hydrophilicity and 2-electron oxygen reduction activity of the carbon fiber.The optimal electrochemical polymerization conditions are the polymerization pulse time of 100 s,the interval of 120 s and 10 pulses.The maximum specific electrochemical activitg surface area reachs 1.5028 cm^(2)/cm^(3).In the sodium sulfate solution with pH=3,a H_(2)O_(2)production rate of 25.775 mol/(m^(3)·h)was achieved,which is about 3.17 times of that of the unmodified graphite felt electrode.

关 键 词：碳电极 聚吡咯 聚合物 电化学 

分 类 号：TQ150.9[化学工程—电化学工业] O613.71[理学—无机化学]