采用化学镀制备了Pd/Sn石墨电极, 用扫描电子显微镜观察了改性后石墨电极试样的微观组织, 用能谱仪确定石墨电极的表面成分, 用循环伏安法及电化学阻抗研究了石墨电极的甲醇氧化电催化性能。结果表明, Pd/Sn以球状颗粒存在于石墨电极表面, 没有出现明显的团聚。峰电流密度与电势扫描速率平方根呈线性关系, 电极上甲醇氧化和中间产物氧化反应速率都随着测试电位的升高而加快。
Pd/Sn graphite electrode had been synthesized by chemical cobalt-plating. The microstructure and composition of modified graphite electrode were analyzed using scanning electron microscope (SEM) and energy dispersive spectrometer (EDS). Cyclic voltammetry and AC impedance were employed to study the electrocatalytic activity of the catalysts. Results show that Pd/Sn were deposited on graphite matrix as spherical particles and has no agglomerate in it. The relationships between peak current density and the square root of scan rate are linear, and the reaction rates of methanol and COads oxidation increase as the potentials increase.
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | XIAO Gang, Fuel Cell Technology (Beijing, Publishing House of Electronics Industry, 2009)(肖 刚, |
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