中文摘要：

研究了1-丁基-3-甲基咪唑硫酸氢盐（[BMIM]HSO4）离子液体对锌电积过程析氧反应的影响.研究工作借助于动电位极化,电化学阻抗谱,扫描电镜和X射线衍射等测试技术.动电位极化曲线及对应的动力学参数分析表明,[BMIM]HSO4对阳极析氧反应具有催化作用,可提高析氧反应速率常数.电化学阻抗谱数据表明,[HBSMOIM4,]电HS阻O值4能至显少著降降低低50阳%极.此析外氧,电添荷加传剂递对电阳阻极,表在面所二研次究反的应1具.8有5-抑2.制10作V用电,位其范在围阳内极添表加面的5m吸g附·L,-阻1[碍BM了IM阴]离子的阳极活化位点吸附过程.电化学测试结果与长时间（120h）阳极极化后所得阳极表面形貌和结晶取向分析结果相一致.[BMIM]HSO4的添加能有效抑制中间产物β-PbO2的形成,促进铅银电极表面大块且疏松多孔α-PbO2的生成,加速阳极析氧的进行.

英文摘要：

The effect of the ionic liquid additive 1-butyl-3-methylimidazolium hydrogen sulfate（[BMIM]HSO4） on the kinetics of oxygen evolution during zinc electrowinning from an acidic sulfate solution was investigated.We used potentiodynamic polarization,electrochemical impedance spectroscopy,scanning electron microscopy,and X-ray diffraction for this study.Potentiodynamic polarization curves and the corresponding kinetic parameter analysis show that [BMIM]HSO4 has a catalytic effect on oxygen evolution by stimulating the reaction rate constant.Impedance data reveal that [BMIM]HSO4 can markedly reduce the oxygen evolution charge transfer resistance.The addition of 5 mg·L-1 [BMIM]HSO4 obviously decreased the resistance value by at least 50% over the studied potential range from 1.85 to 2.10 V.In addition,the results of the impedance measurements also suggest an inhibition effect of [BMIM]HSO4 on the secondary reactions and this is due to the adsorption of the additive on the anode surface,which decreased the amount of active sites for anion adsorption.All electrochemical results were corroborated with a morphological and orientation analysis of the anodic surface after 120 h of anodic polarization.The addition of [BMIM]HSO4 inhibited the generation of the intermediate product β-PbO2 and it promoted the generation of larger,loose,and porous α-PbO2,which benefited the oxygen evolution reaction.