期刊
CHEMISTRY OF MATERIALS
卷 28, 期 22, 页码 8289-8295出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.6b03381
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资金
- U.S. Department of Energy, Office of Basic Energy Science, Division of Chemical Sciences [FG-02-05ER15686]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1362120] Funding Source: National Science Foundation
- Directorate For Engineering [1437601] Funding Source: National Science Foundation
- Div Of Chem, Bioeng, Env, & Transp Sys [1437601] Funding Source: National Science Foundation
Alloying of two metals is commonly used to create nanomaterials with unique physical and chemical properties. The ability to synthesize well-mixed bimetallic alloy nanoparticles, however, is often limited by the intrinsic immiscibility of metals. To overcome this issue, extreme synthesis conditions, using high energy gamma radiation or very high temperatures, have been employed to trap metal atoms of immiscible metals in well-mixed alloy nanostructures. Herein, we demonstrate a more benign synthesis strategy for creating well-mixed bimetallic nanoparticles of immiscible metals. We demonstrate a formation of Ag-Pt bimetallic nanoparticles through the visible-light mediated reduction of a hollow bimetallic oxide precursor containing Ag and Pt oxide. We exploit the optical properties of Ag by using visible light to excite surface plasmon resonance to drive the reduction of the Pt oxide thereby destabilizing the bimetallic precursor. Under the influence of resonant light the hollow bimetallic precursor restructures forming well-mixed Ag-Pt alloy nanoparticles.
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