文献类型：期刊文献

英文题名：Coexisting Single-Atomic Fe and Ni Sites on Hierarchically Ordered Porous Carbon as a Highly Efficient ORR Electrocatalyst

作者：Zhu, Zhengju[1,2];Yin, Huajie[1];Wang, Yun[1];Chuang, Cheng-Hao[3];Xing, Lei[4];Dong, Mengyang[1];Lu, Ying-Rui[5];Casillas-Garcia, Gilberto[6];Zheng, Yonglong[7];Chen, Shan[1];Dou, Yuhai[1];Liu, Porun[1];Cheng, Qilin[2];Zhao, Huijun[1]

机构：[1]Griffith Univ, Ctr Clean Environm & Energy, Gold Coast, Qld 4222, Australia;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China;[3]Tamkang Univ, Dept Phys, Tamsui 251, New Taipei 251301, Taiwan;[4]Univ Oxford, Dept Engn Sci, Oxford OX1 3PJ, England;[5]Natl Synchrotron Radiat Res Ctr, Hsinchu 300, Taiwan;[6]Univ Wollongong, Electron Microscopy Ctr, Wollongong, NSW 2500, Australia;[7]Nanjing Tech Univ, Inst Adv Synth, Sch Chem & Mol Engn, Jiangsu Natl Synerget Innovat Ctr Adv Mat, 30 Puzhu South Rd, Nanjing 211816, Peoples R China

年份：2020

卷号：32

期号：42

外文期刊名：ADVANCED MATERIALS

收录：;EI(收录号：20203809202256);WOS:【SCI-EXPANDED(收录号:WOS:000569825900001)】；

基金：Z.Z. and H.Y. contributed equally to this work. This work was financially supported by the Australian Research Council (ARC) Discovery Project (Grant No. DP170104834) and the Griffith University Postdoctoral Fellowships (2016 and 2017).

语种：英文

外文关键词：electrocatalysis; fuel cell; hierarchically porous structure; oxygen reduction reaction; single atom catalyst

摘要：The development of oxygen reduction reaction (ORR) electrocatalysts based on earth-abundant nonprecious materials is critically important for sustainable large-scale applications of fuel cells and metal-air batteries. Herein, a hetero-single-atom (h-SA) ORR electrocatalyst is presented, which has atomically dispersed Fe and Ni coanchored to a microsized nitrogen-doped graphitic carbon support with unique trimodal-porous structure configured by highly ordered macropores interconnected through mesopores. Extended X-ray absorption fine structure spectra confirm that Fe- and Ni-SAs are affixed to the carbon support via Fe-N(4)and Ni-N(4)coordination bonds. The resultant Fe/Ni h-SA electrocatalyst exhibits an outstanding ORR activity, outperforming SA electrocatalysts with only Fe- or Ni-SAs, and the benchmark Pt/C. The obtained experimental results indicate that the achieved outstanding ORR performance results from the synergetic enhancement induced by the coexisting Fe-N(4)and Ni-N(4)sites, and the superior mass-transfer capability promoted by the trimodal-porous-structured carbon support.