In situ formation of Ni nanoparticles supported on NiFe<sub>2</sub>O<sub>4</sub> by calcination期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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In situ formation of Ni nanoparticles supported on NiFe₂O₄ by calcination

Authors:	Fengxi Chen Ziyi Zhong Yuxiang Chen

Institution:	^a Department of Appalied Catalysis, Institute of Chemical and Engineering Sciences, 1 Pesek Road, Jurong Island 627833, Singapore ^b Department of Materials Science and Engineering, University of Pennsylvania, 3231 Walnut, Street, Philadelphia, PA 19104, USA ^c Southwest Petroleum Institute, No.8 Xindu Road, Xindu District, Chengdu 610500, China

Abstract:	Ni/NiFe₂O₄ composites have been successfully prepared by calcination at 400°C in air of the mixture K₃Fe(ox)₃]·2.5H₂O and NiCl₂·6H₂O with a molar ratio of 0.7-2. The products are featured by the Ni crystallite size of 15-34 nm, BET surface area of 23-41 m²/g and variable Ni loadings. TGA and FTIR results indicate in situ generation of CO molecules from decomposition of K₃Fe(ox)₃]·2.5H₂O. These in situ generated CO molecules account for the formation of Ni nanoparticles by reduction of Ni(II) ions.

Keywords:	Supported Ni catalysts Ferrites Precursor TG-FTIR Thermal decomposition
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