Atomically Dispersed Fe-N-x/C Electrocatalyst Boosts Oxygen Catalysis via a New Metal-Organic Polymer Supramolecule Strategy

doi:10.1002/aenm.201801226

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	Atomically Dispersed Fe-N-x/C Electrocatalyst Boosts Oxygen Catalysis via a New Metal-Organic Polymer Supramolecule Strategy
	Miao, Zhengpei 1; Wang, Xiaoming 2; Tsai, Meng-Che 2; Jin, Qianqian 3; Liang, Jiashun 1; Ma, Feng 1; Wang, Tanyuan 1; Zheng, Shijian 3; Hwang, Bing-Joe 2; Huang, Yunhui 1
刊名	ADVANCED ENERGY MATERIALS
	2018-08-27
卷号	8 期号:24 页码:8
关键词	electrocatalysis energy conversion fuel cells oxygen reduction reaction single atom catalyst
ISSN号	1614-6832
DOI	10.1002/aenm.201801226
通讯作者	Guo, Shaojun(guosj@pku.edu.cn) ; Li, Qing(qing_li@hust.edu.cn)
英文摘要	The development of high-performance oxygen reduction reaction (ORR) catalysts derived from non-Pt group metals (non-PGMs) is urgent for the wide applications of proton exchange membrane fuel cells (PEMFCs). In this work, a facile and cost-efficient supramolecular route is developed for making non-PGM ORR catalyst with atomically dispersed Fe-N-x/C sites through pyrolyzing the metal-organic polymer coordinative hydrogel formed between Fe3+ and -L-guluronate blocks of sodium alginate (SA). High-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) and X-ray absorption spectroscopy (XAS) verify that Fe atoms achieve atomic-level dispersion on the obtained SA-Fe-N nanosheets and a possible fourfold coordination with N atoms. The best-performing SA-Fe-N catalyst exhibits excellent ORR activity with half-wave potential (E-1/2) of 0.812 and 0.910 V versus the reversible hydrogen electrode (RHE) in 0.5 (M) H2SO4 and 0.1 m KOH, respectively, along with respectable durability. Such performance surpasses that of most reported non-PGM ORR catalysts. Density functional theory calculations suggest that the relieved passivation effect of OH* on Fe-N-4/C structure leads to its superior ORR activity to Pt/C in alkaline solution. The work demonstrates a novel strategy for developing high-performance non-PGM ORR electrocatalysts with atomically dispersed and stable M-N-x coordination sites in both acidic and alkaline media.
资助项目	National 1000 Young Talents Program of China ; National Nature Science Foundation of China[21603078] ; National Materials Genome Project[2016YFB0700600]
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science ; Physics
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000442731100020
资助机构	National 1000 Young Talents Program of China ; National Nature Science Foundation of China ; National Materials Genome Project
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/129129]
专题	金属研究所_中国科学院金属研究所
通讯作者	Guo, Shaojun; Li, Qing
作者单位	1.Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, Wuhan 430074, Hubei, Peoples R China 2.Natl Taiwan Univ Sci & Technol, Dept Chem Engn, Taipei 10607, Taiwan 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China 4.Peking Univ, Dept Mat Sci & Engn, Beijing 100871, Peoples R China 5.Peking Univ, BIC ESAT Coll Engn, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Miao, Zhengpei,Wang, Xiaoming,Tsai, Meng-Che,et al. Atomically Dispersed Fe-N-x/C Electrocatalyst Boosts Oxygen Catalysis via a New Metal-Organic Polymer Supramolecule Strategy[J]. ADVANCED ENERGY MATERIALS,2018,8(24):8.
APA	Miao, Zhengpei.,Wang, Xiaoming.,Tsai, Meng-Che.,Jin, Qianqian.,Liang, Jiashun.,...&Li, Qing.(2018).Atomically Dispersed Fe-N-x/C Electrocatalyst Boosts Oxygen Catalysis via a New Metal-Organic Polymer Supramolecule Strategy.ADVANCED ENERGY MATERIALS,8(24),8.
MLA	Miao, Zhengpei,et al."Atomically Dispersed Fe-N-x/C Electrocatalyst Boosts Oxygen Catalysis via a New Metal-Organic Polymer Supramolecule Strategy".ADVANCED ENERGY MATERIALS 8.24(2018):8.