Core-shell CoFe2O4@Co-Fe-Bi nanoarray: a surface-amorphization water oxidation catalyst operating at near-neutral pH

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	Core-shell CoFe2O4@Co-Fe-Bi nanoarray: a surface-amorphization water oxidation catalyst operating at near-neutral pH
	Ji, Xuqiang; Hao, Shuai; Qu, Fengli; Liu, Jingquan; Du, Gu; Chen, Liang; Asiri, Abdullah M.; Sun, Xuping
刊名	NANOSCALE
	2017
卷号	9 期号:23 页码:7714-7718
ISSN号	2040-3364
英文摘要	The exploration of high-performance and earth-abundant water oxidation catalysts operating under mild conditions is highly attractive and challenging. In this communication, core-shell CoFe2O4@Co-Fe-Bi nanoarray on carbon cloth (CoFe2O4@CoFe-Bi/CC) was successfully fabricated by in situ surface amorphization of CoFe2O4 nanoarray on CC (CoFe2O4/CC). As a 3D water oxidation electrode, CoFe2O4@Co-Fe-Bi/CC shows outstanding activity with an overpotential of 460 mV to drive a geometrical catalytic current density of 10 mA cm(-2) in 0.1 M potassium borate ( pH 9.2). Notably, it also demonstrates superior long-term durability for at least 20 h with 96% Faradic efficiency. Density functional theory calculations indicate that the conversion from OOH* to O-2 is the rate-limiting step and the high water oxidation activity of CoFe2O4@Co-Fe-Bi/CC is associated with the lower free energy of 1.84 eV on a Co-Fe-Bi shell.
公开日期	2017-12-25
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/13768]
专题	2017专题
推荐引用方式 GB/T 7714	Ji, Xuqiang,Hao, Shuai,Qu, Fengli,et al. Core-shell CoFe2O4@Co-Fe-Bi nanoarray: a surface-amorphization water oxidation catalyst operating at near-neutral pH[J]. NANOSCALE,2017,9(23):7714-7718.
APA	Ji, Xuqiang.,Hao, Shuai.,Qu, Fengli.,Liu, Jingquan.,Du, Gu.,...&Sun, Xuping.(2017).Core-shell CoFe2O4@Co-Fe-Bi nanoarray: a surface-amorphization water oxidation catalyst operating at near-neutral pH.NANOSCALE,9(23),7714-7718.
MLA	Ji, Xuqiang,et al."Core-shell CoFe2O4@Co-Fe-Bi nanoarray: a surface-amorphization water oxidation catalyst operating at near-neutral pH".NANOSCALE 9.23(2017):7714-7718.