Pt/CeO_2/CNTs催化剂对甲醇电催化氧化的研究  

Electrocatalytic Oxidation of Methanol over Pt/CeO_2/CNTs Catalysts

作　　者：刘春涛[1,2] 孙雍荣[1,3] 谷宇[1] 王阔[1] 杜春雨[3] 

机构地区：[1]黑龙江大学化学化工与材料学院,黑龙江哈尔滨150080 [2]黑龙江省普通高等学校高效转化的化工过程与技术重点实验室,黑龙江哈尔滨150080 [3]哈尔滨工业大学化工学院,黑龙江哈尔滨150001

出　　处：《中国稀土学报》2011年第5期533-537,共5页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金(20706010;20876029)资助

摘　　要：通过微波乙二醇法制备了Pt/CeO2/CNTs催化剂用于碱性体系中的甲醇电催化氧化,考察了不同的CeO2含量对其电催化活性的影响。X射线衍射(XRD)和透射电镜(TEM)结果表明,Pt/CeO2/CNTs催化剂中Pt颗粒较小,在载体上分散性较好。循环伏安曲线和计时电流测试结果表明,Pt/CeO2/CNTs催化剂表现出良好的甲醇电催化氧化性能,当Pt与CeO2质量比为1∶0.5时,催化剂电化学活性面积为76.3 m2.g-1,甲醇氧化峰电流密度值为12.95 mA.cm-2。Pt和CeO2之间的协同作用促进了Pt/CeO2/CNTs催化剂的甲醇电催化氧化性能。Pt/CeO2/CNTs catalysts were prepared by a microwave-assisted polyol approach in order to investigate the effect of the addition of CeO2 with different weight ratios to Pt/CNTs catalysts on electrochemical oxidation of methanol in alkaline solution. The X-ray diffraction （XRD） and transmission electron microsco- py （TEM） results showed dispersed uniformly on the that the Pt particles were CeO2/CNTs supports and Pt particles were smaller. The cyclic voltammetry and chronoamperometry results indicated that the catalytic activity of Pt/CeO2/CNTs catalysts were superior to the Pt/CNTs ones for methanol oxidation in alkaline solution. It was found that the clectroehemical active surfaee area and the peak current density of Pt/CeO2/ CNTs catalyst with Pt to CeO2 weight ratio equals 1：0.5 were76.3 m2.g-1 and 12.95 mA·cm-2, respectively. It exhibited the highest catalytic activity for methanol oxidation. The enhaneed eleetro-ehemieal activity was attributed to the synergistie effect of Pt and CeO2.

关 键 词：电催化氧化 甲醇 CEO2 稀土 

分 类 号：O614.13[理学—无机化学]