Trimetallic nanoaprticles have been reported to be efficient catalysts for many reactions. We developed a general wet-chemistry method to produce Au-Cu-X (X=Pt, Pd, and Ag) trimetallic nanorods using galvanic replacement reaction with Au-Cu nanorods as the templates. The mild conditions, such as low temperature and slow injection of metal precursors, contributed to the slow galvanic replacement reaction and helped maintain the rod structure intact. The alloyed trimetallic nanorods showed enhanced catalytic activity for p-nitrophenol reduction after incorporating the third metal. In another study, Pt-Ni-Co trimetallic nanoframes were synthesized through acid etching of Pt-Ni-Co polyhedral nanoparticles at room temperature. The as-synthesized PtNiCo nanocatalysts showed a four-fold enhancement on specific ORR activity and a two-fold enhancement on mass activity compared with commercial carbon supported Pt nanoparticles.

Synthesis of trimetallic nanorods and nanoframes as electrocatalyts

2019 Spring National Meeting

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