新型炭材料（中英文）2023，Vol.38Issue(5)：976-988,13.DOI:10.1016/S1872-5805(23)60735-8
具有中空和分级多孔结构的高效Co―N―C氧还原反应催化剂
Highly efficient Co―N―C electrocatalysts with a porous structure for the oxygen reduction reaction
摘要
Abstract
Developing low-cost,highly-efficient and stable catalysts for the oxygen reduction reaction(ORR)of fuel cells is highly desirable yet challenging.We have developed a Co―N―C ORR catalyst with an intact hollow spherical structure and a large surface area which has been systematically characterized.It was produced by the uniform growth of zeolitic imidazolate frameworks(ZIF s)on the surface of nano-polystyrene(PS)spheres followed by their decomposition.Notably,the as-prepared catalyst Co-NHCP-2(2 represents a mass ratio of 0.6 between Zn(NO3)2·6H2O and 2-methylimidazole has a porous structure,a super large spe-cific surface area(1817.24 m2 g-1),high contents of pyridinic-N,pyrrolic-N,and graphitic-N,and a uniform Co distribution.As an efficient electrocatalyst,it shows promise in terms of a high onset potential(Eonset)of 0.96 V,a high half-wave potential(E1/2)of 0.84 V,and a limited current density of 5.50 mA cm-2.The catalyst has a nearly 4e pathway for the ORR in an alkaline solution as well as stronger methanol tolerance and higher long-term durability than commercially available Pt/C catalysts.These results show that the obtained material may be a promising electrocatalyst for the ORR.关键词
氧还原反应/分级多孔结构/Co―N―C催化剂/ZIFs/聚苯乙烯球Key words
Oxygen reduction reaction/Hierarchical porous structure/Co―N―C catalyst/ZIFs/Polystyrene sphere引用本文复制引用
贺新福,常廖博,韩鹏飞,李可可,吴红菊,唐勇,王鹏,张亚婷,周安宁..具有中空和分级多孔结构的高效Co―N―C氧还原反应催化剂[J].新型炭材料（中英文）,2023,38(5):976-988,13.基金项目
This work was financially supported by the Na-tional Natural Science Foundation of China(U1703251,U1810113).We thank Dr.Fumin Guo from University of Toronto for his linguistic assist-ance during the preparation of this manuscript. 国家自然科学基金的资助(U1703251,U1810113). （U1703251,U1810113）
