论文标题
通过原子探针和蒸发模拟的协作分析，跟踪碳支持的纳米颗粒中的Mn扩散
Tracking the Mn diffusion in the carbon-supported nanoparticles through the collaborative analysis of atom probe and evaporation simulation
论文作者
论文摘要
碳支持的纳米颗粒由于其表面体积比增强而被广泛用作有效的催化剂。为了调查其结构 - 特性关系，高度必需获得3D元素分布。在这里，合成了碳支持的PT，PTMN合金和有序的PT3MN纳米颗粒，并用原子探针断层扫描作为模型系统合成并分析。发现热处理后MN分布的显着差异。最后，讨论了碳支持的现场蒸发行为，并将每个获得的重建与蒸发模拟的计算结果进行了比较。本文为使用原子探针层析成像进行研究提供了一项指南，该指南在异质性碳纳米颗粒系统上提供了洞察力，从而实现了对碳支持的纳米催化剂的广泛应用的见解。
Carbon-supported nanoparticles have been used widely as efficient catalysts due to their enhanced surface-to-volume ratio. To investigate their structure-property relationships, acquiring 3D elemental distribution is highly required. Here, the carbon-supported Pt, PtMn alloy, and ordered Pt3Mn nanoparticles are synthesized and analyzed with atom probe tomography as model systems. The significant difference of Mn distribution after the heat-treatment was found. Finally, the field evaporation behavior of the carbon support was discussed and each acquired reconstruction was compared with computational results from the evaporation simulation. This paper provides a guideline for studies using atom probe tomography on the heterogeneous carbon-nanoparticle system that leads to insights toward to a wide application in carbon-supported nano-catalysts.
