电流密度对Al/导电涂层/α-PbO2-CeO2-TiO2/β-PbO2-MnO2-WC-ZrO2复合电极材料制备和性能的影响

通过电化学氧化共沉积技术在A1/导电涂层/α-Pb O2-Ce O2-Ti O2基体上,制备了A1/导电涂层/α-PbO 2-Ce O2-Ti O2/β-Pb O2-MnO 2-WC-Zr O2复合阳极材料。通过能量色散X射线光谱（EDXS）、阳极极化曲线、暂稳态极化曲线（Tafel）、交流阻抗谱（EIS）、扫描电子显微镜（SEM）以及X射线衍射（XRD）等方法研究电流密度对复合阳极材料的化学组分、电化学活性和稳定性的影响。研究结果表明：在电流密度为1 A/dm2条件下制备的A1/导电涂层/α-PbO 2-Ce O2-Ti O2/β-PbO 2-MnO 2-WC-Zr O2复合材料具有最低的析...

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Published in中国有色金属学报：英文版 Vol. 24; no. 10; pp. 3394 - 3404
Main Author 杨海涛 陈步明 郭忠诚 刘焕荣 张永春 黄惠 徐瑞东 付仁春
Format Journal Article
LanguageEnglish
Published 2014
Subjects
β-PbO2-MnO2-WC-ZrO2
复合电极材料
电化学共沉积
电流密度
铝基体
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Summary:通过电化学氧化共沉积技术在A1/导电涂层/α-Pb O2-Ce O2-Ti O2基体上,制备了A1/导电涂层/α-PbO 2-Ce O2-Ti O2/β-Pb O2-MnO 2-WC-Zr O2复合阳极材料。通过能量色散X射线光谱（EDXS）、阳极极化曲线、暂稳态极化曲线（Tafel）、交流阻抗谱（EIS）、扫描电子显微镜（SEM）以及X射线衍射（XRD）等方法研究电流密度对复合阳极材料的化学组分、电化学活性和稳定性的影响。研究结果表明：在电流密度为1 A/dm2条件下制备的A1/导电涂层/α-PbO 2-Ce O2-Ti O2/β-PbO 2-MnO 2-WC-Zr O2复合材料具有最低的析氧过电位（0.610 V,条件：500 A/m2）,最好的电化学活性,最长的使用寿命（360 h,条件：150 g/L H2SO4,2 A/cm2,40°C）以及最低的槽电压（2.75 V,条件：500 A/m2）。而且,随着电流密度的增加,涂层晶粒逐渐增大,MnO 2含量也逐渐降低,晶体结构几乎没有变化。
Bibliography:Hai-tao YANG,Bu-ming CHEN,Zhong-cheng GUO,Huan-rong LIU,Yong-chun ZHANG,Hui HUANG,Rui-dong XU,Ren-chun FU（1. Faculty of Metallurgical and Energy Engineering, Ktmming University of Science and Technology, Kunming 650093, China; 2. Kunming Hendera Science and Technology Co., Ltd., Kunming 650022, China; 3. Faculty of Land Resource Engineering, Kunming University of Science and Technology, Ktmming 650093, China; 4. State Key Laboratory Breeding Base of Complex Nonferrous Metal Resources Cleaning Utilization, Kunming University of Science and Technology, Kunming 650093, China; 5. Faculty of Science, Kunming University of Science and Technology, Kunming 650093, China）
composite electrode material;A1 substrate;β-PbO2-MnO2-WC-ZrO2;electrochemical co-deposition;current density
Al/conductive coating/α-Pb O2-Ce O2-Ti O2/β-PbO 2-MnO 2-WC-Zr O2 composite electrode material was prepared on Al/conductive coating/α-PbO 2-Ce O2-Ti O2 substrate by electrochemical oxidation co-deposition technique. The effects of current density on the chemical composition, electrocatalytic activity, and stability of the composite anode material were investigated by energy dispersive X-ray spectroscopy（EDXS）, anode polarization curves, quasi-stationary polarization（Tafel） curves, electrochemical impedance spectroscopy（EIS）, scanning electron microscopy（SEM）, and X-ray diffraction（XRD）. Results reveal that the composite electrode obtained at 1 A/dm2 possesses the lowest overpotential（0.610 V at 500 A/m2） for oxygen evolution, the best electrocatalytic activity, the longest service life（360 h at 40 °C in 150 g/L H2SO4 solution under 2 A/cm2）, and the lowest cell voltage（2.75 V at 500 A/m2）. Furthermore, with increasing current density, the coating exhibits grain growth and the decrease of content of Mn O2. Only a slight effect on crystalline structure is observed.
43-1239/TG
ISSN:1003-6326