Can Silver Be Alloyed with Bismuth on Nanoscale? An Optical and Structural Approach
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- 作者：Víctor-Fabián Ruiz-Ruiz ; Inti Zumeta-Dubé ; David DíazM. Josefina Arellano-Jiménez ; Miguel José-Yacamán
- 刊名：Journal of Physical Chemistry C
- 出版年：2017
- 出版时间：January 12, 2017
- 年：2017
- 卷：121
- 期：1
- 页码：940-949
- 全文大小：605K
- ISSN：1932-7455
文摘
The bulk AgBi alloy system comprises a wide forbidden range of Ag solubility limited to a negligible molar fraction. In this contribution it is unambiguously demonstrated that Ag and Bi, elements with various in-common potential applications, can be alloyed on nanoscale, which is hugely different from the bulk form. These nanostructured Ag–Bi alloys are prepared by a mechano-chemistry pathway under normal conditions and without large amounts of solvents. The characterization of the nanoparticles by combination of UV–visible absorption and Raman spectroscopies as well as SEM, HAADF-STEM, XRD, and DSC lead to the finding of these sui generis nanoalloys and the unprecedented proposal of a predominantly atomic mixed alloyed structure for the AgxBi1–x (0.1 ≤ x ≤ 0.5) clusters. This arrangement allows the coexistence of bulk-like lattices of zerovalent Bi and Ag. These resulting nanoparticles can effectively degrade NO; however, they are rapidly oxidized.