Patent ID: 8652232

Claim:
A process for preparing cubic metallic nanoparticles, comprising at least the following steps: a) preparing at least one aqueous solution containing at least one source of at least one metal selected from metals from group VIII of the periodic table of the elements, at least one reducing agent R1 and at least one stabilizer; b) preparing at least one aqueous solution containing at least one source of at least one metal selected from metals from group VIII of the periodic table of the elements and at least one stabilizer at a temperature strictly higher than 70° C. and less than or equal to 80° C.; and c) mixing at least a portion of the aqueous solution obtained in step a) with the aqueous solution obtained in step b) to obtain, in the presence of at least one reducing agent R2 to form a suspension of, metallic nanoparticles in the cubic or truncated cubic form representing at least 70% by number of the entire quantity of metallic nanoparticles which are formed.