用不同络合剂制备的Pd-Sn／C催化剂在碱性溶液中对乙醇氧化的电催化性能  

Electrocatalytic Performance of Pd-Sn/C Catalyst Prepared with Different Complexants for Ethanol Oxidation in Alkaline Solution

作　　者：李巧霞[1] 毛宏敏[1] 朱萍萍[1] 曹晓璐[1] 陆天虹[2] 徐群杰[1] 

机构地区：[1]上海电力学院环境与化学工程学院,上海200090 [2]江苏省新型动力电池重点实验室 南京师范大学化学与材料科学学院,南京210097

出　　处：《高等学校化学学报》2014年第3期602-607,共6页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21103107)资助~~

摘　　要：采用3种不同的络合剂[柠檬酸三钠、反式-1,2-环己二胺四乙酸·一水(C14H22N2O8·H2O,CyDTA)和氨水]制备了3种Pd-Sn/C催化剂.用X射线能量色散谱(EDS)、X射线衍射谱(XRD)和透射电子显微镜(TEM)表征了3种催化剂的平均粒径、形貌和组成.X射线光电子能谱(XPS)的测试结果表明,3种催化剂表面存在Sn和SnO x2种状态.电化学测试结果表明,3种催化剂在碱性电解液中对乙醇氧化的电催化性能均优于商业化的Pd/C催化剂,其中用CyDTA制备的Pd-Sn/C催化剂在碱性溶液中对乙醇氧化的电催化性能最好.Three complexants, sodium citrate, trans-1,2-diaminocyclohexane-N,N,N＇,N＇ -tetraacetic acid hydrate（ C14 H22 N2 O8 ·H2 O, CyDTA） and ammonia, were used to prepare Pd-Sn/C catalysts. It is found that the electrocatalytic performances of these three catalysts for ethanol oxidation in alkaline solution are better than commercialized Pd/C catalyst. The average particle diameter, morphology and composition of the Pd-Sn/C catalysts prepared were characterized by energy dispersive X-ray spectroscopy （ EDS ） , X-ray diffraction （XRD） and transmission electron microscopy（TEM）. X-ray photoclectron spectroscopy（XPS） measurement reveales that tin oxide and tin exist on the surface of the catalysts. The results of the electrochemical measure-ments indicate that the Pd-Sn/C-CyDTA catalyst has the best electrocatalytic performance for ethanol oxidation in alkaline solution.

关 键 词：乙醇氧化 钯-锡催化剂 络合剂 电催化性能 

分 类 号：O646[理学—物理化学]