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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Operando 3D imaging of defects dynamics of twinned-nanocrystal during catalysis

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Author(s):
Meneau, Florian [1] ; Rochet, Amelie [1] ; Harder, Ross [2] ; Cha, Wonsuk [2] ; Ribeiro Passos, Aline [1]
Total Authors: 5
Affiliation:
[1] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Synchrotron Light Lab LNLS, BR-13083970 Campinas, SP - Brazil
[2] Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 - USA
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF PHYSICS-CONDENSED MATTER; v. 33, n. 27 JUL 7 2021.
Web of Science Citations: 0
Abstract

Using operando Bragg coherent x-ray diffraction imaging, we visualised three-dimensionally a single twinned-gold nanocrystal during the CO oxidation reaction. We describe the defect dynamics process occurring under operating conditions and indicate the correlation between the nucleation of highly strained regions at the surface of the nanocrystal and its catalytic activity. Understanding the twinning deformation mechanism sheds light on the creation of active sites, and could well contribute to the understanding of the catalytic behaviour of other catalysts. With the start-up of 4th generation synchrotron sources, we anticipate that coherent hard x-ray diffraction imaging techniques will play a major role in imaging in situ chemical processes. (AU)

FAPESP's process: 14/25964-5 - From the monomers to the nanoparticles: in situ real time investigation of gold nanoparticles formation by synchrotron and microscopy techniques
Grantee:Florian Edouard Pierre Meneau
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 18/08816-3 - Operando coherent X-ray diffraction: imaging in 3D dimensions nanoparticle catalysts
Grantee:Aline Ribeiro Passos
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 17/23050-4 - Multi-modal approach probing noble-metal catalysts at work
Grantee:Amélie Claire Rochet
Support type: Research Grants - Young Investigators Grants