热处理碳载Fe-三聚氰胺及Fe-g-C_3N_4催化剂的氧还原催化性能  

Catalytic Performance of Heat-Treated Fe-Melamine/C and Fe-g-C_3N_4/C Electrocatalysts for Oxygen Reduction Reaction

作　　者：李赏[1] 王家堂[1] 陈锐鑫[1] 赵伟[1] 钱柳[1] 潘牧[1] 

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室,武汉430070

出　　处：《物理化学学报》2013年第4期792-798,共7页Acta Physico-Chimica Sinica

基　　金：湖北省自然科学基金项目(2012FFB05106);国家重点基础研究发展计划项目(973)(2012CB215504)资助~~

摘　　要：分别以三聚氰胺和三聚氰胺的聚合物为配体,采用浸渍法合成了两种氧还原反应(ORR)催化剂Fe-N/C(1)和Fe-N/C(2).通过X射线衍射光谱(XRD)、X射线光电子能谱(XPS)、透射电子显微镜(TEM)和电化学测试对催化剂的成分、形貌和电催化性能进行了表征.结果表明,以三聚氰胺聚合物为配体制备的Fe-N/C具有更高的ORR催化活性.在高温热处理过程中,催化剂表面能形成更多的石墨N活性点,是其ORR性能提高的重要原因.Melamine and its polymer（g-C3N4） were used as ligands to prepare Fe-N/C electrocatalysts for the oxygen reduction reaction（ORR） by an impregnation method.The composition,morphology and electrocatalytic activity of the catalysts were characterized by X-ray diffraction（XRD）,X-ray photoelectron spectroscopy（XPS）,transmission electron microscopy（TEM）,and electrochemical measurements.The Fe-N/C catalyst using g-C3N4 as a complex ligand showed higher activity in the ORR than that with melamine.The formation of quaternary N active sites on the surface of the catalyst during heat treatment helps to improve their performance in the ORR.

关 键 词：三聚氰胺 非贵金属催化剂 氧还原反应 石墨N 质子交换膜燃料电池 

分 类 号：O643.36[理学—物理化学]