Preparation of ultrafine nickel powder and its catalytic dehydrogenation activity

来自掌桥科研

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179

作者：

J Gao，G Fei，Y Zhao，Y Wu，Y Ma，X Lu，J Hou，J Kang

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摘要：

Nanocrystalline nickel powders were prepared from aqueous solution by reducing their corresponding metal salts under suitable conditions. The experimental conditions including the types and concentration of protective agents, feeding order and the pH of the solution that influence the average particle size were studied in detail. X-ray powder diffraction patterns show that the nickel powder is cubic crystallite. The average particle size of the ultrafine nickel powder is 50 nm. In addition, we also studied the effect of particle size in liquid phase dehydrogenation of 2-butanol. The results show that the smaller particle size is favored of increasing catalytic activity.

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关键词：

Experimental/ catalysts crystallites nanostructured materials nickel particle size pH powder metallurgy reduction (chemical) X-ray diffraction/ preparation ultrafine nickel powder catalytic dehydrogenation activity nanocrystalline nickel powders aqueous solution metal salts reduction protective agents feeding order pH average particle size X-ray powder diffraction patterns nickel powder cubic crystallites liquid phase dehydrogenation 2-butanol catalytic activity 50 nm Ni/ A8120G Preparation of metals and alloys (compacts, pseudoalloys) A8265J Heterogeneous catalysis at surfaces and other surface reactions A8120E Powder techniques, compaction and sintering A6146 Structure of solid clusters, nanoparticles, and nanostructured materials A6480G Microstructure/ size 5.0E-08 m/ Ni/el