氮掺杂石墨烯纳米带的制备及其氧还原反应催化性能研究  

Preparation and ORR electrocatalytic performance of nitrogen-doped graphene nanoribbon

作　　者：张育萌 涂焕碌 张子宽 李帅 侯莹[1] 张华[1] 闫晓丽[1] 章海霞[1] ZHANG Yu-meng;TU Huan-lu;ZHANG Zi-kuan;LI Shuai;HOU Ying;ZHANG Hua;YAN Xiao-li;ZHANG Hai-xia(Key Laboratory of Interface Science and Engineering in Advanced Materials of Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学新材料界面科学与工程教育部重点实验室,山西太原030024

出　　处：《应用化工》2022年第3期674-677,684,共5页Applied Chemical Industry

基　　金：国家自然科学基金(51701137,51703150);山西省面上自然基金(201701D121043,201901D211086);山西省高等学校科技创新项目(2019L0253)。

摘　　要：采用水热法和热解法制备了具有多孔结构的N掺杂石墨烯纳米带(N-GNRs-900),通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)和X射线粉末衍射仪(XRD)等对形貌和结构等进行表征,使用CHI 760E电化学工作站进行氧还原电催化(ORR)性能测试。结果表明,边缘不规则的石墨烯纳米带暴露出大量的边缘缺陷,为杂原子提供掺杂位点,与未掺杂的氧化石墨烯纳米带(GONRs)相比,N-GNRs-900的氧还原反应催化性能明显提高,在0.1 mol/L KOH电解液中,半波电位可达到0.81 V(vs.RHE),起始电位0.92 V(vs.RHE),催化过程接近四电子转移,且循环5000圈半波电位几乎没有负移。Nitrogen-doped graphene nanoribbons(N-GNRs-900)composites were prepared by hydrothermal method and subsequent pyrolysis.The morphology and structure of the samples were characterized by SEM,TEM and XRD.The electrochemical workstation of CHI 760E was used to test the electrocatalytic oxygen evolution(ORR)performance of the samples.The result showed that the graphene nanoribbons with irregular edges exposed a large number of edge defects,providing doping sites for heteroatoms.Compared with the undoped graphene oxide nanoribbon(GONRs),the ORR electrochemical performance of N-GNRs-900 was significantly improved.In the electrolyte of 0.1 mol/L KOH,the half-wave potential could reach 0.81 V(vs.RHE),the onset potential was 0.92 V(vs.RHE).The catalytic process is close to four electron transfer,and there was almost no negative shift in the half-wave potential after 5000 cycles.

关 键 词：氮掺杂 石墨烯纳米带 氧还原反应 电催化 

分 类 号：TQ152[化学工程—电化学工业]