三维石墨烯基B-N-Fe/Co-G材料的制备及其氧还原催化性能研究  

Preparation of 3D Graphene B-N-Fe/Co-G and Research on Its Catalytic Performance of Oxygen Reduction

作　　者：伍小波 姜利民 谢志勇 梁美辰 吴金波 左祺 黄佳帝 彭海波 WU Xiaobo;JIANG Limin;XIE Zhiyong;LIANG Meichen;WU Jinbo;ZUO Qi;HUANG Jiadi;PENG Haibo(College of Metallurgy and Materials Engineering,Hunan University of Technology,Zhuzhou Hunan 412007,China;State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China)

机构地区：[1]湖南工业大学冶金与材料工程学院,湖南株洲412007 [2]中南大学,粉末冶金研究院,粉末冶金国家重点实验室,湖南长沙410083

出　　处：《包装学报》2020年第1期1-8,共8页Packaging Journal

基　　金：湖南省教育厅科学研究基金资助项目(19C0581);湖南创新型省份建设专项基金资助项目(2019RS2067);国家重点研发计划基金资助项目(2018YFB1502500)。

摘　　要：采用脲、硼酸、硝酸铁、硝酸钴分别作为N、B、Fe、Co源,与GO(氧化石墨烯)通过快速冷冻干燥与热解法,制得了三维石墨烯基B-N-Fe/Co-G催化材料,并对其结构和性能进行了测试和表征,研究其氧还原的活性物质与活性点。透射电子显微镜(TEM)、扫描电子显微镜(SEM)、拉曼光谱(Raman)、X射线衍射(XRD)及X射线光电子能谱(XPS)结果显示,所制得掺杂石墨烯表面褶皱呈三维孔洞结构,掺杂原子N、B、Fe、Co均匀掺杂于石墨烯中。通过循环伏安法(CV)、线性扫描伏安法(LSV)等手段对三维石墨烯基B-N-Fe/Co-G催化材料进行电化学性能测试,结果表明:B-N-Fe/Co-G在0.1 mol/L的 KOH碱性电解质中有较高的氧还原(ORR)催化活性,起始电位在1.0 V左右,为4电子转移,相比质量分数20%的商用Pt/C催化剂有更好的电化学稳定性。The fabrication of three dimensional (3D) graphene doped by Nitrogen,Boron,Ferrum and Cobalt atomics (B-N-Fe/Co-G) was demonstrated by using quick-frozen-drying and pyrolysis methods through the reactions between rGO and low cost industrial raw materials (urea,boric acid,iron nitrate,and cobalt acetate) to study the active substances of the oxygen reduction.The structure and morphology of the B-N-Fe/Co-G were investigated by scanning electron microscopy (SEM),transmission electron microscopy (TEM),X-ray diffraction (XRD),X-ray photoelectron spectroscopy (XPS),and Raman spectroscopy.The results showed the 3D porous graphene structure of B-N-Fe/Co-G with fold surface overlapping and these atoms (N、B、Fe and Co) were equably doped in graphene.The electrocatalytic activity of the hybrid material for oxygen reduction was demonstrated by cyclic voltammetry (CV) and linear sweep voltammetry (LSV).The electrochemical measurements indicated that the B-N-Fe/Co-G showed an initial potential around 1.0 V with four-electron reductions way and superior stability compared with 20% of the commercial Pt/C catalyst in acidic solutions.

关 键 词：三维石墨烯 多原子掺杂 电催化 氧还原反应 

分 类 号：O646[理学—物理化学]