Tracking the Mn diffusion in the carbon-supported nanoparticles through the collaborative analysis of atom probe and evaporation simulation

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 nanop...

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Bibliographic Details
Published in:arXiv.org 2022-02
Main Authors: Jung, Chanwon, Jun, Hosun, Jang, Kyuseon, Se-Ho, Kim, Choi, Pyuck-Pa
Format: Article
Language:English
Subjects:
Carbon
Catalysts
Evaporation
Heat treatment
Intermetallic compounds
Nanoparticles
Tomography
Online Access:Get full text
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.2202.08501