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Transformation of β-Ni(OH)2to NiO nano-sheets via surface nanocrystalline zirconia coating: Shape and size retention

Ming-Yao Cheng1 and Bing-Joe Hwang12*

Author Affiliations

1 Nano-electrochemistry Laboratory Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, 106, Taiwan, ROC

2 National Synchrotron Radiation Research Center, Hsinchu, 300, Taiwan, ROC

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Nanoscale Research Letters 2006, 2:28-33  doi:10.1007/s11671-006-9025-5

Published: 11 November 2006


Shape and size of the synthesized NiO nano-sheets were retained during transformation of sheet-like β-Ni(OH)2to NiO at elevated temperatures via nano-sized zirconia coating on the surface of β-Ni(OH)2. The average grain size was 6.42 nm after 600 °C treatment and slightly increased to 10 nm after 1000 °C treatment, showing effective sintering retardation between NiO nano-sheets. The excellent thermal stability revealed potential application at elevated temperatures, especially for high temperature catalysts and solid-state electrochemical devices.

Thermal stability; Nickel oxide; Solid oxide fuel cell; Surface coating; Anode