摘要
研究了PbO附着于Pb-Ag极板表面对电极电化学性能的影响,通过一步电沉积法获得了Pb-Ag/PbO、Pb-Ag/PbO-Co、Pb-Ag/PbO-Mn、Pb-Ag/PbO-Co-Mn 4种复合阳极。通过X射线衍射(XRD)和扫描电子显微镜(SEM)对电极表面形貌和结构进行表征。在模拟锌电积体系中,采用循环伏安曲线(CV)、阳极极化曲线、电化学交流阻抗谱(EIS)对电极电化学性能进行了测试。结果表明:PbO呈片状团聚型结构,Co和Mn掺杂后PbO晶粒被细化,利于活性位点的充分暴露;相对于Pb-Ag电极,沉积电极亲水性有效改善,利于多相反应的发生;相对于Pb-Ag阳极,PbO镀层阳极(包含Co、Mn掺杂电极)具有一定的OER催化活性和更好的耐腐蚀性,在锌电积中展现出较低的槽电压。
The effects of PbO attached to the surface of Pb-Ag plate on the electrochemical performance of the electrode were studied.Four kinds of composite anode materials,Pb-Ag/PbO,Pb-Ag/PbO-Co,Pb-Ag/PbO-Mn,Pb-Ag/PbO-Co-Mn,were obtained by one-step electrodeposition.The morphology and structure of the electrode surface were characterized by X-ray diffraction(XRD)and scanning electron microscopy(SEM).Cyclic voltammetry curve(CV),anode polarization curve and electro-chemical AC impedance spectrum(EIS)were used to test the electrochemical performance of the simulated zinc electrowinning system.The results show that the PbO grains are refined after Co and Mn doping,which is conducive to the full exposure of the active site.Compared with the Pb-Ag electrode,the hydrophilicity of the deposited electrode is improved effectively,which is conducive to the occurrence of polyphase reaction.Compared with the Pb-Ag anode,the PbO coating anode(including Co and Mn doped electrodes)has better OER catalytic activity and higher corrosion resistance.The lower tank voltage can be obtained in zinc electrowinning.
作者
黄艳芳
杨泽
韩桂洪
杨淑珍
杨腾蛟
HUANG Yanfang;YANG Ze;HAN Guihong;YANG Shuzhen;YANG Tengjiao(Zhongyuan Critical Metals Laboratory,Zhengzhou University,Zhengzhou 450001,China;School of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,China;Henan YUGUANG Zinc Industry Co.,Ltd.,Jiyuan 450041,China)
出处
《湿法冶金》
CAS
北大核心
2023年第5期537-545,共9页
Hydrometallurgy of China
基金
国家自然科学基金资助项目(U2004215,U22A20130)
河南省自然科学基金资助项目(232300421196)
郑州大学求是科研启动基金(32213511)。
关键词
锌电积
阳极改性
金属掺杂
亲水性
电化学
zinc electrowinning
anode modification
metal doping
hydrophilicity
electrochemistry
