Boosting electrocatalytic oxygen evolution using ultrathin carbon protected iron-cobalt carbonate hydroxide nanoneedle arrays

doi:10.1016/j.jpowsour.2019.227639

SIC OpenIR

	Boosting electrocatalytic oxygen evolution using ultrathin carbon protected iron-cobalt carbonate hydroxide nanoneedle arrays
	Dai, MM; Fan, HY; Xu, GG; Wang, M; Zhang, S; Lu, LH; Zhang, YG
	2020-02-29
Source Publication	JOURNAL OF POWER SOURCES
ISSN	0378-7753
Subtype	Article
Abstract	Nonprecious metal hydroxides are promising candidates for oxygen evolution reaction (OER) catalysts, Enhancing charge transfer efficiency and optimizing their surface states are crucial to further improve their OER activity for practical applications. Herein, using a facile hydrothermal reaction and low-temperature calcination process, we synthesize ultrathin carbon coated, nitrogen and iron modified cobalt carbonate hydroxide needle arrays on carbon cloth (C@NFeCoCH/CC). The synergistic effect of Fe and N modification induces high OER activity of C@NFeCoCH/CC and a conversion of rate determining step for OER, which mainly benefits from highly active Co/Fe-N-C species in situ formed on the interface of carbon layer and needles. Thin carbon layer, N and Fe modification, along with continuous conductive carbon cloth guarantee fast and stable charge transfer from bulk of free-standing porous catalyst film to its interface. It is found that the optimized C@NFe1Co1CH/CC exhibits a low overpotential of 235 mV at 10 mA cm(-2), a mass activity of 681.4 A g(-1) and a superior stability over 30 hat 10 mA cm(-2). Moreover, experiments demonstrate that the Co/Fe sites possess higher OER activity than the N-C sites, while the Co/Fe-N (-C) sites can obviously outperform the Co/Fe-O sites.
DOI	10.1016/j.jpowsour.2019.227639
WOS Keyword	EFFICIENT WATER OXIDATION ; NITROGEN-DOPED GRAPHENE ; HIGHLY EFFICIENT ; BIFUNCTIONAL ELECTROCATALYSTS ; REDUCTION ; STABILITY ; LAYER ; (OXY)HYDROXIDE ; ALKALINE ; CATALYST
Language	英语
WOS Research Area	Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science
Publisher	ELSEVIER
Citation statistics
Document Type	期刊论文
Identifier	http://ir.sic.ac.cn/handle/331005/28279
Collection	中国科学院上海硅酸盐研究所
Recommended Citation GB/T 7714	Dai, MM,Fan, HY,Xu, GG,et al. Boosting electrocatalytic oxygen evolution using ultrathin carbon protected iron-cobalt carbonate hydroxide nanoneedle arrays[J]. JOURNAL OF POWER SOURCES,2020.
APA	Dai, MM.,Fan, HY.,Xu, GG.,Wang, M.,Zhang, S.,...&Zhang, YG.(2020).Boosting electrocatalytic oxygen evolution using ultrathin carbon protected iron-cobalt carbonate hydroxide nanoneedle arrays.JOURNAL OF POWER SOURCES.
MLA	Dai, MM,et al."Boosting electrocatalytic oxygen evolution using ultrathin carbon protected iron-cobalt carbonate hydroxide nanoneedle arrays".JOURNAL OF POWER SOURCES (2020).

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