Co/rGO复合材料的制备及其氧还原性能  

Synthesis and Properties of Co/rGO Composites for Oxygen Reduction Reaction

作　　者：董冰 石碧清 赵洁妤 裴培 金泥沙 董亚荣 DONG Bing;SHI Biqing;ZHAO Jieyu;PEI Pei;JIN Nisha;DONG Yarong(Department of Environmental Engineering,Hebei Institute of Environmental Engineering,Qinhuangdao 066102,China;Environmental Technology Research and Experiment Center,Hebei Institute of Environmental Engineering,Qinhuangdao 066102,China)

机构地区：[1]河北环境工程学院环境工程系,河北秦皇岛066102 [2]河北环境工程学院环境技术研究与实验中心,河北秦皇岛066102

出　　处：《材料科学与工程学报》2023年第3期373-378,共6页Journal of Materials Science and Engineering

基　　金：河北省自然科学基金资助项目(B2021415002);河北省高等学校科学技术研究资助项目(QN2020142);秦皇岛市科学技术研究与发展计划资助项目(201902A037);河北省重点研发计划资助项目(20373902D);国家自然科学基金资助项目(52201249)。

摘　　要：为解决燃料电池中氧还原反应(ORR)动力学迟缓,减少贵金属Pt的使用,本研究提出了一种原位制备还原氧化石墨烯负载Co纳米粒子(Co/rGO)复合催化剂的方法。采用X射线衍射(XRD)、拉曼光谱(Raman)、透射电子显微镜(TEM)、选区电子衍射、N_(2)-吸脱附等技术手段对所制备的催化剂进行了表征。结果表明,Co/rGO-700复合催化剂保持了石墨烯的大尺寸二维结构,具有高比表面积和丰富缺陷,且Co纳米粒子尺寸均一、分布均匀。这些结构特点使得复合催化剂在ORR中展示出良好的催化性能,Co/rGO-700起始电位接近商用Pt/C催化剂,极限电流密度高于商用Pt/C催化剂,具有良好的稳定性。In order to solve the slow kinetics of oxygen reduction reaction(ORR)in fuel cells and reduce the use of precious metal Pt,a method for in-situ preparation of reduced graphene oxide supported Co nanoparticles(Co/rGO)composite catalysts was proposed,and the prepared catalysts were characterized by XRD,Raman,TEM,SAED and BET.The results show that the Co/rGO-700 composite catalyst maintains the large-size two-dimensional structure,has a high specific surface area and rich defect sites,and the size and distribution of Co nanoparticles are uniform.These characteristics make the composite catalyst shows a good catalytic activity in ORR.The onset potential of Co/rGO-700 is close to commercial Pt/C and the limiting current density is higher than that of commercial Pt/C.Moreover,it exhibits an outstanding durability.

关 键 词：钴纳米粒子 石墨烯 氧还原反应 复合催化剂 

分 类 号：TQ152[化学工程—电化学工业] TB333[一般工业技术—材料科学与工程]