刘晓丹,吴凯,廖卫平,吕宏缨,索掌怀.炭黑负载Pd-Co双金属催化剂对葡萄糖氧化的电催化性能[J].分子催化,2016,30(5):462-469 |
炭黑负载Pd-Co双金属催化剂对葡萄糖氧化的电催化性能 |
Electrocatalytic Performance of Carbon Black-supported Pd-Co Bimetallic Catalysts in Glucose Oxidation |
投稿时间:2016-05-24 修订日期:2016-09-01 |
DOI: |
中文关键词: 炭黑 钯 钴助剂 葡萄糖 电催化氧化 |
英文关键词:palladium cobalt carbon black glucose oxidation electrocatalysis |
基金项目:国家自然科学基金(21273193) |
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中文摘要: |
采用硼氢化钠还原法,制备了炭黑负载的Pd及PdCo双金属催化剂,比较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、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 Pd3Co1/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。 |
英文摘要: |
A class of alloyed Pd-Co catalysts supported on carbon black are prepared by a sodium borohydride reduction method. The electrooxidation of glucose on Pd/C and PdCo/C electrodes has been studied and compared. The catalysts were characterized by X-ray diffraction (XRD) ,transmission electron microscopy (TEM),X-ray photoelectron spectroscopy (XPS) and electrochemical surface area (ECSA) ; The activity and stability for glucose electrocatalytic oxidation reaction were evaluated by cyclic voltammetry and chronoamperogram method at room temperature. Effects of Pd load and quality of Pd/Co ratio during the preparation on the activities and stabilities were studied.It is found that Pd-Co/C catalyst with the load of 5% of Pd and quality of Pd/Co ratio of 3:1 showed the better catalytic activity and stability than Pd/C catalyst. This result clearly shows that Pd-Co/C catalyst has a good activity and stability for glucose electrocatalytic oxidation reaction in comparison to Pd/C. Single metal Co/C has no electrocatalytic activity for glucose. The results indicate that adding Co to Pd/C catalyst can improve obviously the dispersion of Pd particles and its electrochemical surface area, resulting the rich-palladium surface structure. |
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