在甲磺酸镀液中电沉积Pb-Zn镀层,然后用体积分数为10%的H2SO4腐蚀镀层,使镀层中的Zn脱溶,成功得到多孔Pb-Zn电极,该镀层由铅(Fm3m)和锌(Pb3/mmc)的混合物组成.采用循环伏安、阴极极化、计时电量及电化学阻抗等方法,研究了马来酸在多孔Pb-Zn电极和Pb电极上的电化学还原特性.结果表明,马来酸在电极上先发生吸附,然后进行不可逆电子传递反应;马来酸在Pb电极和多孔Pb-Zn电极上还原的扩散系数分别为1.2×10(-7)和1.7×10(-7)cm2/s;随着温度升高,马来酸在Pb电极上表观交换电流密度稳定性不如多孔Pb-Zn电极,多孔Pb-Zn电极上马来酸在低温处i(0)与温度呈线性关系,从50℃开始,i(0)急剧增加,至65℃,i(0)迅速下降,其在多孔Pb-Zn电极上电还原在50～60℃最好.马来酸在多孔Pb-Zn电极比相应的Pb电极上具有更高的电催化活性.
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