【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.更多还原

【Abstract】 Three complexants,sodium citrate,trans-1,2-diaminocyclohexane-N,N,N’,N’-tetraacetic acid hydrate(C 14 H 22 N 2 O 8 ·H 2 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 measurements indicate that the Pd-Sn / C-CyDTA catalyst has the best electrocatalytic performance for ethanol oxidation in alkaline solution.更多还原