文献类型：期刊文献

英文题名：Atomically dispersed Fe-N-P-C complex electrocatalysts for superior oxygen reduction

作者：Li, Yahao[1];Chen, Bingxu[1,2];Duan, Xuezhi[2];Chen, Shuangming[3];Liu, Daobin[3];Zang, Ketao[4,5];Si, Rui[6];Lou, Fengliu[1];Wang, Xuehang[1];Ronning, Magnus[1];Song, Li[3];Luo, Jun[4,5];Chen, De[1]

机构：[1]Norwegian Univ Sci & Technol, Dept Chem Engn, N-7491 Trondheim, Norway;[2]East China Univ Sci & Technol, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Univ Sci & Technol China, CAS Ctr Excellence Nanosci, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China;[4]Tianjin Univ Technol, Ctr Electron Microscopy, Tianjin 300384, Peoples R China;[5]Tianjin Univ Technol, Tianjin Key Lab Adv Funct Porous Mat, Inst New Energy Mat, Sch Mat, Tianjin 300384, Peoples R China;[6]Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China

年份：2019

卷号：249

起止页码：306

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENTAL

收录：;EI(收录号：20191006612742);WOS:【SCI-EXPANDED(收录号:WOS:000464487500030)】；

基金：The financial supports from Department of Chemical Engineering, NTNU and Norwegian research council are highly acknowledged. Dr. Yahao Li acknowledges the support from China Scholarship Council (CSC) for his study at NTNU.

语种：英文

外文关键词：Atomically dispersed iron electrocatalyst; N,P co-doped carbon; Biomass; Oxygen reduction reaction; DFT calculations

摘要：Development of cost-effective electrocatalysts as an alternative to platinum for oxygen reduction reaction (ORR) is of great significance for boosting the applications of green energy devices such as fuel cells and metal-air batteries. Here we report a nitrogen and phosphorus tri-doped hierarchically porous carbon supported highly cost-effective, efficient and durable Fe single-site electrocatalyst derived from biomass. Combined aberration-corrected HAADF-STEM, XPS and XAFS measurements and theoretical calculations reveal the atomically dispersed Fe-N-P-C-O complex as the dominant active sites for ORR. This work also shows the design principle for enhancing the ORR activity of single Fe site catalysts with higher Fe charge, which can be manipulated by the coordinated structure in the active centre. Theoretical calculations reveal that the main effective sites are singleN-P-O-Fe-O centers, where the associated P-O-Fe bond can significantly lower the stability of strongly adsorbed O-star and OH star on the catalytically active sites and thus give rise to enhanced ORR performance. The insights reported here open a new avenue for constructing highly efficient molecule-like heterogeneous catalysts in electrochemical energy technologies.