Structural conversion using core-shell silver (Ag)-platinum (Pt) nanoparticles as starting materials is a promising way to produce nanocomposites consisting of silver sulfide (Ag₂S) and hollow Pt nanostructures (Ag₂S-hPtNCs). However, the mechanism behind the structural conversion process is yet to be understood. In this study, we use transmission electron microscope (TEM) as a typical tool to characterize the products formed in different structural conversion processes, and interpret the experimental observations by proposing mechanisms behind the reactions between core-shell Ag-Pt nanoparticles and sulfur precursors from different sources. We then design additional experiments to rationalize the formation mechanism we proposed. The mechanistic understanding of the structural conversion from bimetallic core-shell nanostructures to heterogeneous nanocomposites may extend the fabrication of heterogeneous nanocomposites for a given technological application.

以核-壳型银（Ag）-铂（Pt）纳米颗粒为起始原料进行结构转化是生产由硫化银（Ag ₂ S）和中空Pt纳米结构（Ag ₂ ）组成的纳米复合材料的一种有前途的方法S-hPtNC）。但是，结构转换过程背后的机制尚待了解。在这项研究中，我们使用透射电子显微镜（TEM）作为表征在不同结构转化过程中形成的产物的典型工具，并通过提出核-壳型Ag-Pt纳米粒子与硫磺前驱体之间的反应背后的机理，来解释实验观察结果。不同的来源。然后，我们设计其他实验以合理化我们提出的形成机制。从双金属核-壳纳米结构到异质纳米复合材料的结构转变的机械理解可以扩展给定技术应用的异质纳米复合材料的制造。