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采用硼氢化钠还原法,制备了炭黑负载的Pd及Pd Co双金属催化剂,研究了葡萄糖在不同催化剂上的氧化行为.通过X射线粉末衍射、透射电镜及X射线光电子能谱及电化学活性面积测定对催化剂进行了表征;利用循环伏安、及计时电流等电化学测试方法研究了Pd负载量及Pd/Co质量比对Pd-Co/C催化剂的葡萄糖电催化氧化活性与稳定性的影响.结果表明,当Pd的负载量为5%、Pd/Co质量比为3时,所得Pd_3Co_1/C催化剂对葡萄糖的电催化氧化活性与稳定性明显优于Pd/C催化剂,且单金属Co/C催化剂没有催化活性.钴助剂的引入提高了Pd的分散度,增大了电化学活性面积,从而提高了Pd的利用效率与催化性能.
The Pd-Pd and Pd-Co bimetallic catalysts supported on carbon black were prepared by sodium borohydride reduction method, and the oxidation behavior of glucose on different catalysts was investigated. XRD, TEM and XPS were used to characterize the electrochemical activity of glucose The effect of Pd loading and Pd / Co mass ratio on the catalytic activity of Pd-Co / C catalyst for glucose electrocatalytic oxidation was investigated by cyclic voltammetry and electrochemical measurements such as chronoamperometry. The results showed that the electrocatalytic oxidation activity and stability of glucose on Pd 3 Co 1 / C catalyst were better than that of Pd / C catalyst when Pd loading was 5% and Pd / Co mass ratio was 3, C catalyst has no catalytic activity.The introduction of cobalt promoter improves the dispersion of Pd and increases the electrochemical active area, thus improving the utilization efficiency and catalytic performance of Pd.