摘要
为了提高锌电积用Pb-Ag合金的析氧电催化活性和耐腐蚀性,采用直流电沉积在Pb-Sn-Sb合金基体表面制备了CeO_2颗粒改性的β-PbO_2-MnO_2复合惰性阳极,测试了PbO_2-MnO_2(CeO_2)复合惰性阳极在锌电积模拟溶液中的阳极极化曲线和Tafel极化曲线。结果表明:CeO_2在β-PbO_2-MnO_2中的沉积,提高了PbO_2-MnO_2(CeO_2)复合惰性阳极的析氧电催化活性和耐腐蚀性能。当酸性镀液中CeO_2浓度控制在10 g/L时,PbO_2-MnO_2(CeO_2)复合惰性阳极在锌电积模拟溶液中的析氧(过)电位最低,腐蚀电位最高,腐蚀电流密度最小。
In order to improve the oxygen evolution electrocatalytic activity and corrosion resistance for Pb-Ag alloy used for zincelectrowinning, β-PbO2-MnO2 composite inert anodes modified by cerium dioxide（CeO2） are prepared on the surface of Pb-SnSb alloy substrates by direct current electrodeposition, and the anodic polarization curves and Tafel polarization curves of PbO2-MnO2（CeO2） composite inert anodes are measured in the simulated solutions of zinc electrowinning. The results show that the deposition of CeO2 particles into the β-Pb2-MnO2 deposits increases the oxygen evolution electrocatalytic activity and corrosion resistance. When CeO2 concentration in acid bath is controlled at 10 g/L, the oxygen evolution potential of PbO2-MnO2（CeO2） composite inert anode is the lowest, corrosion potential is the highest and corrosion current density is the smallest.
作者
李伊阳
徐瑞东
于伯浩
张靖实
秦紫阳
LI Yiyang;XU Ruidong;YU Bohao;ZHANG Jingshi;QIN Ziyang(School of Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science andTechnology, Kunming 650093, China)
出处
《文山学院学报》
2018年第3期19-22,共4页
Journal of Wenshan University
基金
国家自然科学基金“锌电积用3D钛基β-PbO_2-MnO_2复合电极的制备、性能及机理研究”(515640129)
云南省应用基础研究计划重点项目“锌电积用多组元活性节能阳极材料构筑及电化学特性”(2014FA024)
关键词
惰性阳极
CEO2
锌电积
阳极极化曲线
塔菲尔曲线
Inert anode
cerium dioxide
zinc electrowinning
anodic polarization curve
Tafel polarization curve
