Cu-MnO_(2)的制备及电催化析氢性能研究  

Preparation of Cu-MnO_(2) and Study of its Electrocatalytic Hydrogen Evolution Performance

作　　者：邹如意 戚丽 张小兰 吴粤南 吴梓阳 丁勇星 ZOU Ruyi;QI Li;ZHANG Xiaolan;WU Yuenan;WU Ziyang;DING Yongxing

机构地区：[1]上饶师范学院化学与环境科学学院,江西上饶334001

出　　处：《化工设计通讯》2025年第1期3-5,15,共4页Chemical Engineering Design Communications

基　　金：2024年度江西省教育厅科技项目,ZnO基光催化剂的制备及在污水净化中的应用(GJJ2401701);2021年度江西省教育厅科技项目,含二苯基/二氰基乙烯基二取代N-(4-三氟甲基苯基)咔唑结构单元的功能性聚酰亚胺的合成和性能(GJJ211707);2023年度上饶市科技局研究项目,用于超级电容器的碳化多孔芳烃框架封装的多金属氧酸盐复合电极储能机理研究(2023AB015);2022年度上饶市科技局研究项目,基于三联吡啶的聚集诱导发光聚合物的合成及性能研究(2022YF026);2024年度上饶师范学院校级项目,碳负载Co3V2O8复合材料的制备与储能研究(SRKJ01)。

摘　　要：通过沉淀法和热解法制备了系列MnO_(2)催化剂。X射线衍射仪(XRD)和扫描电子显微镜(SEM)表征显示Mn O2为正方晶系的针状晶体。循环伏安法、线性扫描伏安法以及电化学阻抗法的检测表明Cu掺杂可影响MnO_(2)的电催化性能,相比之下,其中的Cu_(0.85)-MnO_(2)有最佳的电催化析氢性能,即电流密度为10 mA·cm^(-2)时的过电位(304 mV)最低、Tafel斜率(98 mV·dec^(-1))最小、电化学活性面积(137.25)最大,界面电荷转移电阻(53.28Ω)最小。A series of MnO_(2) catalysts for hydrogen evolution were prepared by precipitation and pyrolysis.They were characterized by X-ray diffractometer(XRD)and scanning electron microscope(SEM),and the results showed that they were tetragonal MnO_(2),which were acicular crystals.Cyclic voltammetry,linear sweep voltammetry,and electrochemical impedance method were used to detect these compounds.It was found that Cu doping greatly affected the electrocatalytic hydrogen evolution performance of MnO_(2).In contrast,Cu_(0.85)-MnO_(2) in this series of catalysts had the best electrocatalytic performance,namely:the lowest overpotential(304 mV)at a current density of 10 mA·cm^(-2),the smallest Tafel slope(98 mV·dec^(-1)),the largest electrochemically active area(137.25),and the smallest interfacial charge transfer resistance(53.28Ω).

关 键 词：电催化 CU MnO_(2) 析氢反应 过电位 

分 类 号：TQ426[化学工程]