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	Core-ring structured NiCo/sub 2/O/sub 4/ nanoplatelets: synthesis, characterization, and electrocatalytic applications
	Bai Cui ; Hong Lin ; Jian-Bao Li ; Xin Li ; Jun Yang ; Jie Tao
	2010-10-12 ; 2010-10-12
关键词	Experimental/ catalysts current density electrochemical electrodes electrolysis nanofabrication nanostructured materials nickel compounds precipitation (physical chemistry) transmission electron microscopy/ core-ring structured nanoplatelets electrocatalyst coprecipitation decomposition method sodium hydroxide precipitant hexagonal phase high-resolution transmission electron microscopy energy dispersive spectroscopy oxygen evolution reaction alkaline water electrolysis electrodes current density temperature 200 C NiCo/sub 2/O/sub 4// A6146 Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials A8116 Methods of nanofabrication and processing A6475 Solubility, segregation, and mixing A8245 Electrochemistry and electrophoresis A8265J Heterogeneous catalysis at surfaces and other surface reactions/ temperature 4.7315E+02 K/ NiCo2O4/ss Co2/ss O4/ss Co/ss Ni/ss O/ss
中文摘要	An innovative nanostructure, namely the core-ring structure, is reported in this paper. It occurs in NiCo/sub 2/O/sub 4/ nanoplatelets, synthesized by the coprecipitation decomposition method using sodium hydroxide as the precipitant. The yield of core-ring hexagonal NiCo/sub 2/O/sub 4/ nanoplatelets is greater than 80% at 200 degrees C. A high-resolution transmission electron microscopy and energy dispersive spectroscopy investigation reveals the typical core-ring nanostructure, which shows a strong enrichment of Co in the core with a Co content higher than 80%. A mechanism for the core-ring structure formation is proposed. The core-ring NiCo/sub 2/O/sub 4/ can be used as an electrocatalyst for an oxygen evolution reaction (OER) in alkaline water electrolysis. Compared with the electrodes of ordinary NiCo/sub 2/O/sub 4/ and Co/sub 3/O/sub 4/, or other NiCo/sub 2/O/sub 4/ electrodes prepared by alternate methods, the electrode coated by core-ring NiCo/sub 2/O/sub 4/ nanoplatelets exhibits the greatest electrocatalytic properties, with an over-potential of 0.315 V at a current density of 100 mA cm/sup -2/.
语种	英语
出版者	Wiley-VCH Verlag GmbH ; Germany
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/78534]
专题	清华大学
推荐引用方式 GB/T 7714	Bai Cui,Hong Lin,Jian-Bao Li,et al. Core-ring structured NiCo/sub 2/O/sub 4/ nanoplatelets: synthesis, characterization, and electrocatalytic applications[J],2010, 2010.
APA	Bai Cui,Hong Lin,Jian-Bao Li,Xin Li,Jun Yang,&Jie Tao.(2010).Core-ring structured NiCo/sub 2/O/sub 4/ nanoplatelets: synthesis, characterization, and electrocatalytic applications..
MLA	Bai Cui,et al."Core-ring structured NiCo/sub 2/O/sub 4/ nanoplatelets: synthesis, characterization, and electrocatalytic applications".(2010).

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