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.
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)
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
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)。
关键词
钴纳米粒子
石墨烯
氧还原反应
复合催化剂
Co nanoparticles
Graphene
Oxygen reduction reaction
Composite catalyst
