AI Article Synopsis
- A new wet-chemistry method enables the creation of Au-Cu-X trimetallic nanorods (X = Pt, Pd, Ag) through galvanic replacement using Au-Cu nanorods as templates.
- The process involves mild conditions, promoting a slow reaction that preserves the rod structure and ensures even distribution of metals.
- The resulting alloyed nanorods exhibit significantly improved catalytic activity for reducing p-nitrophenol, especially Au-Cu-Pd and Au-Cu-Pt, which show over ten times higher mass activities than their Au-Cu counterparts.
Article Abstract
This work reports 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 keep the rod structure intact. The distribution of Au, Cu and the doping metals was even in the rods as confirmed by elemental mapping. The alloyed trimetallic nanorods showed enhanced catalytic activity for p-nitrophenol reduction after incorporating the third metal. Remarkably, the Au-Cu-Pd and Au-Cu-Pt nanorods show more than an order of magnitude improvement in the mass activities compared to the Au-Cu nanorods. This facile and general synthetic method can be applied to fabricate other multimetallic nanoparticles with varying shapes and compositions.
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| http://dx.doi.org/10.1039/c8cc08083f | DOI Listing |
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