CPC B22F 1/17 (2022.01) [B01J 23/892 (2013.01); B01J 35/006 (2013.01); B01J 35/026 (2013.01); B01J 37/0201 (2013.01); B01J 37/0215 (2013.01); B01J 37/031 (2013.01); B01J 37/14 (2013.01); B22F 1/054 (2022.01); B22F 9/04 (2013.01); B22F 1/0553 (2022.01); B22F 2301/15 (2013.01); B22F 2301/25 (2013.01); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01)] | 20 Claims |
1. A method of synthesizing Pt shell PtNi core particle comprising the steps of:
forming a reaction mixture comprising a nickel precursor, a reducing agent, and a surfactant comprising oleic acid, a platinum precursor, and a polar solvent;
reacting the reaction mixture at between 200° C. and 300° C. for at least 10 minutes, forming a PtNi nanocage solution;
isolating PtNi nanocages from the PtNi nanoparticle solution;
exposing the PtNi nanocages to oxygen;
forming nickel oxide by reaction of nickel of the PtNi nanocages with the oxygen;
exposing the nickel oxide PtNi nanocages to hydrogen and argon at a temperature of at least 400° C.; and
removing the nickel oxide from at least a portion of the PtNi nanocages.
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