Core-ring structured NiCo2O4 nanoplatelets:: Synthesis, characterization, and electrocatalytic applications

被引:430
作者
Cui, Bai [1 ]
Lin, Hong [1 ]
Li, Jian-Bao [1 ]
Li, Xin [1 ]
Yang, Jun [1 ]
Tao, Jie [1 ]
机构
[1] Tsinghua Univ, State Key Lab New Ceram & Fine Proc, Dept Mat Sci & Engn, Beijing 100084, Peoples R China
关键词
D O I
10.1002/adfm.200700982
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
An innovative nanostructure, namely the core-ring structure, is reported in this paper. It occurs in NiCo2O4 nanoplatelets., synthesized by the coprecipitation decomposition method using sodium hydroxide as the precipitant. The yield of core-ring hexagonal NiCo2O4 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 NiCo2O4 can be used as an electrocatalyst for an oxygen evolution reaction (OER) in alkaline water electrolysis. Compared with the electrodes of ordinary NiCo2O4 and Co(3)O4, or other NiCo2O4 electrodes prepared by alternate methods, the electrode coated by core-ring NiCo2O4 nanoplatelets exhibits the greatest electrocatalytic properties, with an over-potential of 0.315 V at a current density of 1.00 mA cm(-2).
引用
收藏
页码:1440 / 1447
页数:8
相关论文
共 34 条
[1]   NiCo2O4 spinel:: First report on a transition metal oxide for the negative electrode of sodium-ion batteries [J].
Alcántara, R ;
Jaraba, M ;
Lavela, P ;
Tirado, JL .
CHEMISTRY OF MATERIALS, 2002, 14 (07) :2847-+
[2]  
BAYDI ME, 1995, J SOLID STATE CHEM, V116, P157, DOI DOI 10.1006/JSSC.1995.1197
[3]   Effect of precipitant on preparation of Ni-Co spinel oxide by coprecipitation method [J].
Bo, C ;
Li, JB ;
Han, YS ;
Dai, JH .
MATERIALS LETTERS, 2004, 58 (09) :1415-1418
[4]   Nickel-cobalt oxide-coated electrodes: influence of the preparation technique on oxygen evolution reaction (OER) in an alkaline solution [J].
Bocca, C ;
Barbucci, A ;
Delucchi, M ;
Cerisola, G .
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 1999, 24 (01) :21-26
[5]   MECHANISTIC STUDY OF CL2 EVOLUTION AT TI-SUPPORTED CO3O4 ANODES [J].
BOGGIO, R ;
CARUGATI, A ;
LODI, G ;
TRASATTI, S .
JOURNAL OF APPLIED ELECTROCHEMISTRY, 1985, 15 (03) :335-349
[6]   NANOSCALE IMAGING OF MOLECULAR ADSORPTION [J].
CAI, H ;
HILLIER, AC ;
FRANKLIN, KR ;
NUNN, CC ;
WARD, MD .
SCIENCE, 1994, 266 (5190) :1551-1555
[7]  
CHARDVICK AV, 2007, J PHYS CHEM C, V111, P4636
[8]   Electrophoretic deposition of ZnCo2O4 spinel and its electrocatalytic properties for oxygen evolution reaction [J].
Chi, B ;
Li, JB ;
Yang, XZ ;
Lin, H ;
Wang, N .
ELECTROCHIMICA ACTA, 2005, 50 (10) :2059-2064
[9]   Effect of temperature on the preparation and electrocatalytic properties of a spinel NiCo2O4/Ni electrode [J].
Chi, B ;
Li, JB ;
Han, YS ;
Chen, YJ .
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2004, 29 (06) :605-610
[10]   Comparison of three preparation methods of NiCo2O4 electrodes [J].
Chi, Bo ;
Lin, Hong ;
Li, Jianbao ;
Wang, Ning ;
Yang, Jun .
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2006, 31 (09) :1210-1214