Determination of the Real Surface Area of Palladium Electrode
Determination of the Real Surface Area of Palladium Electrode
复制标题
钯电极真实表面积的测定
DOI：
10.1088/1674-0068/23/05/543-548
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发表时间：
2010-10-01
影响因子：
1
通讯作者：
Chen, Yan-xia
中科院分区：
文献类型：
--
作者：
Fang, Lan-lan;Tao, Qian;Chen, Yan-xia
采用伏安法双电层电容测量、表面氧化物还原、铜的欠电位沉积和一氧化碳（CO）溶出等四种方法对多晶Pd（pc-Pd）电极的真实的比表面积进行了测定。结果表明，第二种方法和第三种方法得到的结果一致，偏差小于5%。由测定的双电层电容和CO剥离电荷推导出双电层电容单位面积为23.1±0.4 μF/cm 2，饱和CO吸附层应为约。0.66 ML，以确保测定的真实的表面积与其他两种技术一致。讨论了这些技术在测定pc-Pd电极真实的表面积时的适用性和注意事项。
Four methods, including voltammetric measurement of double layer capacitance, surface oxides reduction, under potential deposition of Cu and carbon monoxide (CO) stripping have been applied to evaluate the real surface area of a polycrystalline Pd (pc-Pd) electrode. The results reveal that the second and third methods lead to consistent results with deviations below 5%. And from the determined double layer capacitance and CO stripping charge, it is deduced that the double layer capacity unit area is 23.1±0.4 μF/cm2 and the saturated CO adlayer should be ca. 0.66 ML in order to ensure that the real surface area as determined is consistent with the other two techniques. The applicability as well as the attentions when applying these techniques for the determination of the real surface area of pc-Pd electrodes have been discussed.