Publications by authors named "C Atlan"
Understanding the strain dynamic behavior of catalysts is crucial for the development of cost-effective, efficient, stable, and long-lasting catalysts. Using time-resolved Bragg coherent diffraction imaging at the fourth generation Extremely Brilliant Source of the European Synchrotron (ESRF-EBS), we achieved subsecond time resolution during chemical reactions. Upon investigation of Pt nanoparticles during CO oxidation, the three-dimensional strain profile highlights significant changes in the surface and subsurface regions, where localized strain is probed along the [111] direction.
View Article and Find Full Text PDFSolid-state reactions play a key role in materials science. The evolution of the structure of a single 350 nm NiFe nanoparticle, , its morphology (facets) as well as its deformation field, has been followed by applying multireflection Bragg coherent diffraction imaging. Through this approach, we unveiled a demixing process that occurs at high temperatures (600 °C) under an Ar atmosphere.
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- Controlling how effectively electrocatalysts convert carbon dioxide into useful chemicals is difficult due to factors like bulk and surface lattice strain.
- This study uses advanced imaging techniques to analyze the dynamic behavior of Cu-Ag tandem catalysts, creating three-dimensional strain maps based on varying electrical conditions and product outputs.
- Results show that adding moderate amounts of silver improves the stability of the catalyst and reduces unwanted hydrogen production, highlighting the significance of using advanced spectroscopy methods for better understanding these catalysts.
Article Synopsis
- Surface strain is a key factor in gas phase catalysis and electrocatalysis, affecting how adsorbates bind to catalysts.
- Researchers used advanced techniques at the European Synchrotron Radiation Facility to study strain in individual platinum nanoparticles while controlling their electrochemical environment.
- Findings revealed a complex strain distribution in the nanoparticles that varies with their structure, which can help in designing better nanocatalysts for energy applications.
Bragg coherent X-ray diffraction is a nondestructive method for probing material structure in three dimensions at the nanoscale, with unprecedented resolution in displacement and strain fields. This work presents , a user-friendly and open-source tool to process and analyze Bragg coherent X-ray diffraction data. It integrates the functionalities of the existing packages and in the same toolbox, creating a natural workflow and promoting data reproducibility.
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