Method for synthesis of ruthenium nanoparticles with face-centered cubic and hexagonal close-packed structures
AssigneeHonda Motor Co., Ltd.
InventorsAvetik Harutyunyan, Nam Hawn Chou
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Abstract
The present disclosure provides for methods for preparing ruthenium nanoparticles characterized by face centered cubic crystallographic structure characterized by small particle size, substantially homogeneous particle size distribution, substantially uniform spherical shape, and substantial high temperature stability. The present disclosure further provides for methods for preparing ruthenium nanoparticles characterized by face hexagonal close packed crystallographic structure characterized by small particle size, substantially homogeneous particle size distribution, substantially uniform spherical shape, and substantial high temperature stability.
Claims21
A method of synthesizing ruthenium nanoparticles, the method comprising:
- preparing a precursor solution comprising a ruthenium precursor compound and glycol;
- heating the precursor solution to a temperature of from about 90° C. to about 225° C.;
- adding an acid salt compound reducing agent to the precursor solution to form a reaction mixture comprising nucleated ruthenium;
- incubating the reaction mixture in a growth phase at a temperature of from about 150° C. to about 225° C. to form ruthenium nanoparticles in the reaction mixture;
- and
- separating ruthenium nanoparticles from the reaction mixture.
A method of synthesizing ruthenium nanoparticles with face centered cubic (FCC) crystallographic structure, the method comprising:
- preparing a precursor solution comprising a ruthenium precursor compound and glycol;
- heating the precursor solution to a temperature of from about 170° C. to about 225° C.;
- adding an acid salt compound reducing agent to the precursor solution to form a reaction mixture comprising nucleated ruthenium;
- incubating the reaction mixture in a growth phase at a temperature of from about 170° C. to about 225° C. to form ruthenium nanoparticles in the reaction mixture, the nanoparticles having FCC crystallographic structure;
- and
- separating the ruthenium nanoparticles from the reaction mixture.
A method of synthesizing ruthenium nanoparticles with hexagonal close packed (HCP) crystallographic structure, the method comprising:
- preparing a precursor solution comprising a ruthenium precursor compound and a glycol;
- heating the precursor solution to a temperature of from about 50° C. to about 120° C.;
- adding an acid salt compound reducing agent to the precursor solution to form a reaction mixture comprising nucleated ruthenium;
- incubating the reaction mixture in a growth phase at a temperature of from about 125° C. to about 225° C. to form ruthenium nanoparticles in the reaction mixture, the nanoparticles having HCP crystallographic structure;
- and
- separating the ruthenium nanoparticles from the reaction mixture.
Dependencies are inferred from the claim text.