In situ reactor to image catalysts at work in three-dimensions by Bragg coherent X-ray diffraction

Author(s)

Rochet, Amelie ; Suzana, Ana Flavia ; Passos, Aline R. ; Kalile, Tiago ; Berenguer, Felisa ; Santilli, Celso V. ; Pulcinelli, Sandra H. ; Meneau, Florian

• Document type: Journal article
• Source: CATALYSIS TODAY; v. 336, p. 5-pg., 2019-10-01.

Abstract

A new reactor dedicated to high temperature Bragg coherent X-ray diffraction imaging (Bragg CDI) of heterogeneous catalysts at atmospheric pressure has been developed. It allows direct visualisation of the shape, surface texture and inner structures of single nanoparticles with a resolution of a few tens of nanometers. Moreover, in situ Bragg CDI provides information of the displacement field evolution during the reaction. Our setup has been used to observe restructuring in three-dimensions of a model gold catalyst under controlled temperatures and gas atmospheres, He and CO/O-2/He. The catalytic performances obtained inside this reactor during the catalytic oxidation of carbon monoxide can be directly correlated with the structural changes of the nanoparticles. (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 Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 17/01283-7 - Bragg coherent diffraction imaging for characterisation of gold nano-catalysts
• Grantee: Ana Flávia Suzana
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• FAPESP's process: 14/27127-3 - Genesis of gold nanoparticles: nucleation, growth and stabilization
• Grantee: Ana Flávia Suzana
• Support Opportunities: Scholarships in Brazil - Doctorate