Detalhes do Documento

Descrição

Made available in DSpace on 2019-10-06T16:58:09Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-10-01

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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/O2/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.

Center for Research in Energy and Materials (CNPEM) Brazilian Synchrotron Light Laboratory (LNLS)

Instituto de Química UNESP - Univ Estadual Paulista, Rua Professor Francisco Degni, 55

Synchrotron SOLEIL L'Orme des Merisiers Saint-Aubin BP 48

Instituto de Química UNESP - Univ Estadual Paulista, Rua Professor Francisco Degni, 55

FAPESP: 2014/25964-5

FAPESP: 2014/27127-3

FAPESP: 2017/01283-7

CNPq: 453943/2017-9

CAPES: 88887.149400/2017-00