石墨烯负载Pt-Co纳米粒子及其在氧化还原反应中的应用(英文)  

Preparation of graphene-supported Pt-Co nanoparticles and their use in oxygen reduction reactions

作　　者：马延文[1,2] 刘忠儒[3] 王博琳[3] 朱磊[2] 杨建平[1] 李兴鳌[1] 

机构地区：[1]南京邮电大学信息材料与纳米技术研究院,江苏南京210046 [2]南京大学化学化工学院,江苏南京210093 [3]南京邮电大学光电工程学院,江苏南京210046

出　　处：《新型炭材料》2012年第4期250-257,共8页New Carbon Materials

基　　金：National Natural Science Foundation of China(20833002,20903057,51172110);Research Fund for the Doctoral Program of Higher Education of China(20093223120002);Natural Science Foundation of Jiangsu Province(BK2010525,BK2011750);Foundation of Jiangsu Educational Committee(09KJB150007,08KJB150011);Scientific Research Foundation of Nanjing University of Posts and Telecommunications(NY208046,NY208025,NY208026)~~

摘　　要：采用微波-乙二醇方法还原氧化石墨烯和Pt(IV)、Co(II)粒子混合物,再经300℃H2还原,制备了石墨烯负载Pt-Co合金催化剂(Pt-Co/G)。利用透射电镜、X-射线能谱、X-射线衍射和光电子能谱对所制催化剂进行表征。Pt-Co合金的粒径为3 nm～8 nm,均匀地分散在石墨烯片上。与单金属的Pt/G和商品化的Pt/C催化剂相比,所制合金化的Pt-Co/G催化剂对氧还原反应展现出高的催化活性和可比拟的稳定性,显示了其在燃料电池中的应用潜力。Electrocatalysts of graphene-supported Pt-Co alloy nanoparticles（Pt-Co/G） were prepared by a simultaneous reduction of mixtures of graphene oxide and Pt（IV）,Co（II） ions with ethylene glycol assisted by a microwave and further H2 treatment at 300 ℃.As-prepared Pt-Co/G catalysts were characterized by transmission electron microscopy,energy-dispersive X-ray spectrometry,X-ray diffraction,and X-ray photoelectron spectroscopy.The Pt-Co binary alloy nanoparticles with a size of 3-8 nm were homogeneously dispersed on the graphene.Compared with the monometallic Pt/G and commercial Pt/C catalysts,the Pt-Co/G catalysts have a high stability and increased electrocatalytic activity that is conducive for the oxygen reduction reaction,suggesting their potential application in fuel cells.

关 键 词：石墨烯 Pt-Co合金纳米粒子 氧化还原反应 燃料电池 电催化剂 

分 类 号：TB383.1[一般工业技术—材料科学与工程] O643.3[理学—物理化学]