Fe-leaching induced surface reconstruction of Ni-Fe alloy on N-doped carbon to boost oxygen evolution reaction

doi:10.1016/j.cej.2020.124977

SIC OpenIR

	Fe-leaching induced surface reconstruction of Ni-Fe alloy on N-doped carbon to boost oxygen evolution reaction
	Zhou, YJ; Li, YH; Zhang, LX; Zhang, LL; Li, L; Tian, JJ; Wang, M; Xu, JY; Dai, B; Li, YS
	2020-08-15
Source Publication	CHEMICAL ENGINEERING JOURNAL
ISSN	1385-8947
Subtype	Article
Abstract	Understanding the dynamic transformation process of the oxygen evolution reaction (OER) catalysts is of importance for their rational design. Here we first report that Fe-leaching could induce the electrochemical activation of strongly coupled Ni-Fe alloy on N-doped carbon composites to boost the OER performance. It is demonstrated that the leaching of unstable FeOOH mixed layer from the surface of FeNi3 alloy is responsible for the surface reconstruction and exposure of more active sites. Furthermore, the N-doped carbon, FeNi3 alloy, together with the accompanying generation of Fe-doped Ni(OH)(2), synergistically promote the OER activity after fully activation. It is also verified that the high valent Ni species, pyridinic N and the metal-N species are the exact active centers and the fully activated catalyst Fe0.2Ni0.8/NC-600-a is among the best non-noble OER catalysts to date, which exhibits superior OER performance with a low overpotential (eta(20) = 290 mV) and small Tafel slope (76 mV dec(-1)). This study is helpful to understand the fundamentals of the Ni-Fe alloy catalysts and provides guidance to design advanced catalysts for water oxidation through in-situ electrochemical activation.
DOI	10.1016/j.cej.2020.124977
WOS Keyword	EFFICIENT ; ELECTROCATALYSTS ; OXIDE ; METAL ; NANOPARTICLES ; NANOSHEETS ; GRAPHENE ; GENERATION ; OXIDATION ; ARRAY
Language	英语
WOS Research Area	Engineering
Publisher	ELSEVIER SCIENCE SA
Citation statistics	Cited Times:3[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.sic.ac.cn/handle/331005/27828
Collection	中国科学院上海硅酸盐研究所
Recommended Citation GB/T 7714	Zhou, YJ,Li, YH,Zhang, LX,et al. Fe-leaching induced surface reconstruction of Ni-Fe alloy on N-doped carbon to boost oxygen evolution reaction[J]. CHEMICAL ENGINEERING JOURNAL,2020.
APA	Zhou, YJ.,Li, YH.,Zhang, LX.,Zhang, LL.,Li, L.,...&Li, YS.(2020).Fe-leaching induced surface reconstruction of Ni-Fe alloy on N-doped carbon to boost oxygen evolution reaction.CHEMICAL ENGINEERING JOURNAL.
MLA	Zhou, YJ,et al."Fe-leaching induced surface reconstruction of Ni-Fe alloy on N-doped carbon to boost oxygen evolution reaction".CHEMICAL ENGINEERING JOURNAL (2020).

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