Effect of Cerium on Gas Evolution Behavior of Pb-Ca-Sn Alloy

被引：0
|
作者：
林冠发 [1 ,2 ]
周根树 [2 ]
李党国 [2 ]
郑茂盛 [2 ]
机构：
[1] Research Institute of Goods Tubular, China National Petroleum Corporation, Xi′an 710065, China
[2] School of Material Science and Engineering, Xi′an Jiaotong University, Xi′an 710049, China
来源：
Journal of Rare Earths | 2006年 / 02期
关键词：
cyclic voltammetry; AC impedance; Pb-Ca-Sn-Ce alloy; rare earths;
D O I：
暂无
中图分类号：
TM910.4 [];
学科分类号：
摘要：
The effect of Ce on the behavior of gas evolution on Pb-Ca-Sn alloy in 4.5 mol·L -1 H2SO4 was investigated using cyclic voltammetry （CV）, cathodic polarization curves and AC impedance （EIS）. Cyclic voltammetry experiments show that the current of oxygen evolution on Pb-Ca-Sn-Ce electrode is lower than that of Pb-Ca-Sn electrode in the same anodic voltage. Moreover, the oxygen evolution potential on the former electrode is greater than that on the latter, and this means that Ce can increase the potential of oxygen evolution on Pb-Ca-Sn alloy. The AC impedance experiments show that Ce can also enhance the resistance of hydrogen evolution on Pb-Ca-Sn electrode, i.e., Ce can inhibit the hydrogen evolution on Pb-Ca-Sn electrode. The reason why Ce decreases the volume of hydrogen evolution on Pb-Ca-Sn alloy is that Ce increases the resistance of absorbing step of hydrogen evolution reaction. All the experimental results indicate that Pb-Ca-Sn-Ce alloy can rapidly decrease the oxygen and hydrogen evolution on Pb-Ca-Sn-Ce alloy. It is concluded that Pb-Ca-Sn-Ce alloy can promote the maintenance-free property of lead acid battery, and can serve as the candidate of the grid material for maintenance-free lead acid battery.
引用
收藏
页码：232 / 237
页数：6
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