Abstract
Pt–Ag alloy triangular nanoframes were prepared by a galvanic replacement (GR) reaction of Ag nanoprisms with H2PtCl6 in an aqueous solution. Their growth mechanisms were studied by observing transmission electron microscopic (TEM) and TEM-energy dispersed X-ray spectroscopy (EDS) images and surface plasmon resonance (SPR) bands. Results show that triangular Pt–Ag alloy prisms are slowly formed 12–48h after the addition of H2PtCl6. We found that after treatment using saturated NaCl solution is effective for the transformation of Ag-rich Pt–Ag alloy nanoprisms to Pt-rich Pt–Ag nanoframes.
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