锌电积工业用新型泡沫铝/Pb-0.6%Ag合金复合阳极的电化学性能（英文）  

Electrochemical Performance of a New Type Aluminum Foam/Pb-0.6 wt%Ag Alloy Composite Anode for Zinc Electrowinning Industry

作　　者：周向阳[1] 马驰原[1] 杨娟[1] 王帅[1] 王辉[1] 龙波[1] Zhou Xiangyang, Ma Chiyuan, Yang Juan, Wang Shuai, Wang Hui, Long Bo(Central South University, Changsha 410083, China)

机构地区：[1]中南大学,湖南长沙410083

出　　处：《稀有金属材料与工程》2018年第10期3008-3014,共7页Rare Metal Materials and Engineering

基　　金：National Nature Science Foundation of China(51304254,51274240);China Postdoctoral Science Foundation(2015M580698)

摘　　要：为克服传统锌电积阳极存在的高析氧过电位和高银含量的缺陷,发明了一种新型泡沫铝/Pb-0.6%Ag(质量分数)复合阳极。采用计时电位法,扫描电镜,交流阻抗法和塔菲尔测试法对比研究了在160 g/L H_2SO_4溶液中极化72 h后泡沫铝/Pb-0.6%Ag复合阳极和Pb-0.6%Ag阳极的电化学性能。结果表明:泡沫铝/Pb-0.6%Ag复合阳极的阳极膜比Pb-0.6%Ag阳极的更平整,且抗腐蚀能力更强。此外,泡沫铝/Pb-0.6%Ag复合阳极的稳定阳极电位更小,与通过计时电位法和交流阻抗法获得的高PbO_2,低Pb O,Pb O·Pb SO_4含量和低R_(ct)值一致。泡沫铝/Pb-0.6%Ag复合阳极具有更优异的析氧反应行为。In order to overcome the defects of high over-potential and preparation cost existing in traditional Pb alloy anodes,a new type aluminum foam/Pb-0.6 wt%Ag alloy composite anode（AF/Pb-0.6 wt%Ag anode）was produced.The electrochemical performance of AF/Pb-0.6 wt%Ag anode and traditional Pb-0.6 wt%Ag anode after 72 h galvanostatic polarization in 160 g/L H_2SO_4solution was investigated comparatively by chronopotentiometry（CP）,scanning electron microscopy（SEM）,electrochemical impedance spectroscopy（EIS）and Tafel measurements.The results show that the anodic layer of AF/Pb-0.6 wt%Ag anode is more intact than that of the Pb-0.6 wt%Ag anode,and exhibits better corrosion resistance.Moreover,the AF/Pb-0.6 wt%Ag anode shows a lower stable anodic potential,which is consistent with higher PbO_2,lower PbO,PbO·PbSO_4 content and R_（ct） value obtained by CP and EIS measurements.It is also revealed that the AF/Pb-0.6 wt%Ag anode possesses a better oxygen evolution reaction（OER）.

关 键 词：泡沫铝/Pb-0.6%Ag复合阳极 电化学性能 阳极膜 耐腐蚀性 析氧反应 

分 类 号：O646.54[理学—物理化学]