Method to control the Sizes of the Core-Shell Nanoparticles

摘要

The present invention relates to a method for controlling the size of core-shell nanoparticles, and more particularly, preparing a slurry by irradiating ultrasonic waves to a dispersion containing a reducing solvent, a carbon support, a transition metal precursor and a noble metal precursor, After filtering the slurry, washing and drying to prepare a solid, and heat-treating the dried solid at a pressure of 1 to 80 bar, a temperature of 450 to 600 ° C, and 30 minutes to 10 hours under an N 2 atmosphere to obtain nanoparticles Core-shell to provide excellent stability (durability), small average diameter, and excellent dispersion and uniformity while not performing a complicated post-treatment process for removing the protective layer used during conventional heat treatment, including the manufacturing step It relates to a method for controlling the size of nanoparticles.