Affiliation:
1. Department of Materials Science School of Chemistry and Chemical Engineering Nantong University Nantong Jiangsu 226019 P. R. China
2. Coating Research Institute School of Engineering Eastern Michigan University Ypsilanti MI 48197 USA
Abstract
AbstractMetal–nitrogen–carbon (M–C/N) electrocatalysts have been shown to have satisfactory catalytic activity and long‐term durability for the oxygen reduction reaction (ORR). Here, a strategy to prepare a new electrocatalyst (Fe&Pd–C/N) using a unique metal‐containing ionic liquid (IL) is exploited, in which Fe & Pd ions are positively charged species atomically dispersed by coordination to the N of the N‐doped C substrate, C/N. X‐ray absorption fine structure, XPS and aberration‐corrected transmission electron microscopy results verified a well‐defined dual‐atom configuration comprising Fe+2.x–N4 coupled Pd2+–N4 sites and well‐defined spatial distribution. Electronic control of a coupled Fe–Pd structure produces an electrocatalyst that exhibits superior performance with enhanced activity and durability for the ORR compared to that of commercial Pt/C (20%, Johnson Matthey) in both alkaline and acid media. Density functional theory calculations indicate that Pd atom can enhance the catalytic activity of the Fe active sites adjacent to Pd sites by changing the electronic orbital structure and Bader charge of the Fe centers. The excellent catalytic performance of the Fe&Pd–C/N electrocatalyst is demonstrated in zinc–air batteries and hydrogen–air fuel cells.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Jiangsu Province
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献