Unravelling the Structure of Electrocatalytically Active Fe-N Complexes in Carbon for the Oxygen Reduction Reaction

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	Unravelling the Structure of Electrocatalytically Active Fe-N Complexes in Carbon for the Oxygen Reduction Reaction
	Y. S. Zhu; B. S. Zhang; X. Liu; D. W. Wang; D. S. Su
	2014
发表期刊	Angewandte Chemie-International Edition
ISSN	1433-7851
卷号	53 期号:40 页码:10673-10677
摘要	Non-precious Fe/N co-modified carbon electrocatalysts have attracted great attention due to their high activity and stability in oxygen reduction reaction (ORR). Compared to iron-free N-doped carbon electrocatalysts, Fe/N-modified electrocatalysts show four-electron selectivity with better activity in acid electrolytes. This is believed relevant to the unique Fe-N complexes, however, the Fe-N structure remains unknown. We used o,m,p-phenylenediamine as nitrogen precursors to tailor the Fe-N structures in heterogeneous electrocatalysts which contain FeS and Fe3C phases. The electrocatalysts have been operated for 5000 cycles with a small 39 mV shift in half-wave potential. By combining advanced electron microscopy and Mossbauer spectroscopy, we have identified the electrocatalytically active Fe-N-6 complexes (FeN6, [FeIII(porphyrin)(pyridine)(2)]). We expect the understanding of the FeN6 structure will pave the way towards new advanced Fe-N based electrocatalysts.
部门归属	[zhu, yansong ; zhang, bingsen ; su, dang sheng] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, liaoning, peoples r china. [zhu, yansong] anshan normal univ, sch chem & life sci, anshan 114005, liaoning, peoples r china. [liu, xin] chinese acad sci, dalian inst chem phys, dalian 116023, liaoning, peoples r china. [wang, da-wei] unsw australia, sch chem engn, unsw sydney, nsw 2052, australia. ; su, ds (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, liaoning, peoples r china. ; dssu@imr.ac.cn
关键词	Active Sites Electrocatalysts Iron Mossbauer Spectroscopy Oxygen Reduction Reaction Pem Fuel-cells Nonprecious-metal-catalysts Electrochemical Reduction Cathode Catalysts Black Supports Iron Performance Kinetics Cobalt Orr
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语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73524
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. S. Zhu,B. S. Zhang,X. Liu,et al. Unravelling the Structure of Electrocatalytically Active Fe-N Complexes in Carbon for the Oxygen Reduction Reaction[J]. Angewandte Chemie-International Edition,2014,53(40):10673-10677.
APA	Y. S. Zhu,B. S. Zhang,X. Liu,D. W. Wang,&D. S. Su.(2014).Unravelling the Structure of Electrocatalytically Active Fe-N Complexes in Carbon for the Oxygen Reduction Reaction.Angewandte Chemie-International Edition,53(40),10673-10677.
MLA	Y. S. Zhu,et al."Unravelling the Structure of Electrocatalytically Active Fe-N Complexes in Carbon for the Oxygen Reduction Reaction".Angewandte Chemie-International Edition 53.40(2014):10673-10677.