Preparation and characterization of polyvinylchloride membrane embedded with Cu nanoparticles for electrochemical oxidation in direct methanol fuel cell  

直接甲醇燃料电池用含纳米铜聚氯乙烯电化学氧化膜的制备与表征

作　　者：Rohitash KUMAR Aftab Aslam Parwaz KHAN Anish KHAN Abdullah M ASIRI Yusra HAMID Rohitash KUMAR;Aftab Aslam Parwaz KHAN;Anish KHAN;Abdullah M ASIRI;Yusra HAMID(Department of Petroleum Studies,Aligarh Muslim University,Aligarh 202002,India;Center of Excellence for Advanced Materials Research and Chemistry Department,Faculty of Science,King Abdulaziz University,Jeddah 21589,P.O.Box 80203,Saudi Arabia;Department of Industrial Chemistry and Chemical Engineering,Politecnico di Milano,Milano 20133,Italy)

机构地区：[1]Department of Petroleum Studies,Aligarh Muslim University,Aligarh 202002,India [2]Center of Excellence for Advanced Materials Research and Chemistry Department,Faculty of Science,King Abdulaziz University,Jeddah 21589,P.O.Box 80203,Saudi Arabia [3]Department of Industrial Chemistry and Chemical Engineering,Politecnico di Milano,Milano 20133,Italy

出　　处：《Transactions of Nonferrous Metals Society of China》2020年第8期2207-2216,共10页中国有色金属学报（英文版）

摘　　要：Copper nanoparticles were prepared by the chemical reduction method.These copper particles were embedded into the polyvinylchloride(PVC)matrix as support and used as an electrode(PVC/Cu)for the oxidation of methanol fuel for improving the current response.The PVC/Cu electrodes were characterized by thermal gravimetric analysis(TGA)for thermal stability of the electrode,X-ray diffraction(XRD)for identification of copper nanoparticles in the electrode,Fourier transform infrared spectroscopy(FTIR)to identify the interaction between PVC and Cu and scan electron microscopy(SEM)with EDAX for the morphology of the electrode.The electrocatalytic activity of the electrode was characterized by the cyclic voltammetry,linear sweep voltammetry,and chronoamperometry techniques.An increase in the electrode activity was observed with the increase of copper quantity from 0.18 g(PVC/Cu-0.18 g)to 0.24 g(PVC/Cu-0.24 g)and the maximum was found at 0.24 g of copper in the electrode.Also,it was observed that the electrode achieved the maximum catalytic current in 0.5 mol/L CH3OH+1 mol/L Na OH solution.FTIR identified that water molecules,C—H group,copper nanoparticle and its oxide were available in the electrode.SEM images with EDAX showed that copper particles were properly embedded in the polyvinylchloride matrix.采用化学还原法制备纳米铜颗粒,然后将其嵌入聚氯乙烯(PVC)基体中得到PVC/Cu膜,作为电极材料以提高甲醇燃料氧化的电流响应。用热重分析(TGA)表征PVC/Cu电极的热稳定性,用X射线衍射(XRD)检测电极中的铜纳米颗粒,用傅里叶变换红外光谱(FTIR)鉴定PVC与铜之间的相互反应,用扫描电镜(SEM)和能谱(EDAX)分析该电极的显微形貌,并用循环伏安法、线性扫描伏安法和计时电流法表征该电极的电催化活性。结果表明,随着铜含量从0.18 g(PVC/Cu-0.18 g)增加到0.24 g(PVC/Cu-0.24 g),电极的活性增加,且在铜含量为0.24 g时达到最大值。电极在0.5 mol/L CH3OH+1 mol/L Na OH溶液中达到最大催化电流。FTIR结果显示,电极中含有水分子、C—H基团、铜颗粒和铜的氧化物。SEM和EDAX结果表明,铜颗粒在聚氯乙烯基体中嵌入良好。

关 键 词：copper nanoparticles POLYVINYLCHLORIDE direct methanol fuel cell electrochemical methods 

分 类 号：TB383.2[一般工业技术—材料科学与工程] TM911.4[电气工程—电力电子与电力传动]