高等学校化学学报Issue(9)：1737-1742,6.DOI:10.7503/cjcu20150232
石墨烯负载Fe-N/C复合型氧还原催化剂
Graphene-supported Fe-N/C Composite Catalyst for Oxygen Reduction
摘要
Abstract
NG/Fe-N/C composite catalysts with sandwich nanostructure were synthesized by an impregnation method using polypyrrole as ligand. Nitrogen-doped graphene was doped into the Fe-N/C catalyst during the process of synthesis. By the synergistic reaction between graphene and Fe-N/C, the catalytic activity and stability of catalyst were improved. XRD, SEM, TEM and XPS were used to character the physical structure, morphology and chemical composite of catalysts. The results show that the catalyst has the optimal oxyen reductive reaction( ORR) activity when the mass ratio of grapheme to BP2000 is 1:4 and the heat treatment temperature is 800 ℃. The accelerated aging test( AAT) test shows that catalyst NG/Fe-N/C-25 is more sta-ble than commercial 20% Pt/C catalyst in acidic medium. The total N content of NG/Fe-N/C-25 catalyst is about 5. 17%, and the content of graphite nitrogen and pyridine nitrogen are about 44. 35% and 32. 66%, respectively. These high content of graphitic nitrogen and pyridine nitrogen may result in the high ORR activity and stability.关键词
质子交换膜燃料电池/聚吡咯/掺氮石墨烯/氧还原反应/稳定性/三明治结构NG/Fe-N/C催化剂Key words
Proton exchange membrane fuel cell/Polypyrrole/Nitrogen-doped graphene/Oxygen reductive reaction/Stability/Sandwich nanostructural NG/Fe-N/C composite catalyst分类
化学化工引用本文复制引用
李赏,李沛,赵伟,康欢,潘牧..石墨烯负载Fe-N/C复合型氧还原催化剂[J].高等学校化学学报,2015,(9):1737-1742,6.基金项目
国家自然科学基金(批准号:21406173)和武汉理工大学自主创新研究基金(批准号:2014-Ⅳ-133)资助 （批准号:21406173）
