Ni and Ni/NiO core-shell nanoparticles
AssigneesGM Global Technology Operations LLC, Dalian Institute of Chemical Physics, Chinese Academy of Sciences
InventorsWenjie Shen, Yong Li, Mei Cai, Jerry Rogers
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Abstract
Glycerol is used as a solvent medium for the precipitation of a complex of nickel and glycerol material. The precipitate is separated from the liquid solvent and dried and calcined in air to produce small (nanometer size) particles characterized by a nickel core encased in a nickel oxide shell. The proportions of nickel core and nickel oxide shell can be controlled by management of the time and temperature of heating in air. Prolonged heating in air can produce nickel oxide particles, or calcining of the precipitate in nitrogen produces nickel particles.
Claims10
A method of making particles of nickel or nickel oxide, or particles having a core of nickel enclosed in a shell of nickel oxide, the method comprising;
- dissolving a nickel salt in a glycerol containing solvent;
- precipitating a complex of nickel and glycerol from the solution;
- heating the precipitate in an atmosphere and at a temperature and for a time selected to decompose the nickel-glycerol complex and to produce particles of nickel, or nickel oxide, or particles having a core of nickel enclosed in a shell of nickel oxide.
Dependencies are inferred from the claim text.