US Patent:
20110250122, Oct 13, 2011
Inventors:
Sang Hoon Joo - Ulsan, KR
Jeong Young Park - Albany CA, US
Peidong Yang - Kensington CA, US
Gabor A. Somorjai - Berkeley CA, US
Assignee:
The Regents of the University of California - Oakland CA
International Classification:
C01B 31/20
B01J 23/42
B01J 23/44
B01J 23/46
B01J 23/52
B01J 23/50
B01J 23/72
B01J 23/755
B01J 23/75
B01J 23/745
B01J 21/08
B01J 21/04
B01J 21/06
B01J 23/20
B01J 35/08
B01J 35/06
B01J 37/025
B01J 37/08
B01J 37/14
C07C 5/03
B01J 35/10
B82Y 30/00
US Classification:
4234372, 502300, 502339, 502325, 502344, 502347, 502345, 502337, 502338, 502240, 502355, 502350, 502349, 502353, 585275, 977773, 977774, 977762
Abstract:
The present invention provides a core-shell nanoparticle that includes a metal-oxide shell and a nanoparticle. Pores extend from an outer surface to an inner surface of the shell. The inner surface of the shell forms a void, which is filled by the nanoparticle. The pores allow gas to transfer from outside the shell to a surface of the nanoparticle. The present invention also provides a method of making a core-shell nanoparticle includes forming a metal-oxide shell on a colloidal nanoparticle, which forms a precursor core-shell nanoparticle. A capping agent is removed from the precursor core-shell nanoparticle, which produces the core-shell nanoparticle. The present invention also provides a method of using a nanocatalyst of the present invention includes providing the nanocatalyst, which is the core-shell nanoparticle. Reactants are introduced in a vicinity of the nanocatalyst, which produces a reaction that is facilitated or enhanced by the nanocatalyst.