直接热分解法制备单相Pd-Fe合金催化剂及电催化氧还原活性  

Carbon Supported Pd-Fe Catalyst with Uniform Alloy Structure Prepared with Direct Thermo-decomposition Method for Oxygen Reduction Reaction

作　　者：王彦恩[1] 武小杰[1] 何城磊 赵佳宁[1] 唐亚文[2] 陆天虹[2] 

机构地区：[1]河北农业大学理学院,现代科技学院,保定071000 [2]南京师范大学化学与材料科学学院,南京210097

出　　处：《无机材料学报》2015年第12期1315-1320,共6页Journal of Inorganic Materials

基　　金：国家自然科学基金(21073094,21273116,61171015);江苏高校优势学科建设工程(10KJB150007)~~

摘　　要：以醋酸钯和醋酸亚铁为前驱体,采用直接热分解法制备了碳载Pd_3-Fe_1(Pd_3-Fe_1/C)催化剂。用X射线衍射(XRD)、透射电镜(TEM)和X射线光电子能谱(XPS)等技术对催化剂进行了表征,用循环伏安法和线性扫描伏安法研究了催化剂对氧的电催化还原性能。结果表明,制备的Pd_3-Fe_1/C复合催化剂具有单相均一的合金结构,Fe进入Pd晶格改变了Pd电子结构和结构常数。电化学数据表明,Pd_3-Fe_1/C对氧还原比Pd/C催化剂有更高的电催化性能。The Pd3-Fe1/C catalyst was synthesized with the direct thermo-decomposition method using Pd（CH3COO）2 and Fe（CH3COO）2 as precursors. The Pda-Fe1/C catalyst was characterized with X-ray diffraction（XRD）, transmission electron microscope（TEM） and X-photoelectron spectroscope（XPS）. The electrocatalytic performance of the Pd3-Fe1/C catalyst was investigated with the cyclic voltammetry and Linear scan voltammograms. The results show that Fe atom has entered into the Pd crystal lattice and formed a single-phase fcc disordered alloyed structure （solid solution）. Electrochemical data indicate that the eletrocatalytic activity of the Pda-Fel/C electrocatalyst for oxygen reduction reaction （ORR） is much higher than that of Pd/C electrocatalyst.

关 键 词：直接热分解 碳载Pd-Fe催化剂 单相合金 氧还原 

分 类 号：O646[理学—物理化学]