Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/330206
Type: Artigo
Title: Pretreatment Impact On The Morphology And The Catalytic Performance Of Hybrid Heterodimers Nanoparticles Applied To Co Oxidation
Pretreatment impact on the morphology and the catalytic performance of hybrid heterodimers nanoparticles applied to CO oxidation
Author: Costa, Luelc Souza da
Zanchet, Daniela
Abstract: In this work, we applied seeded growth colloidal method to produce Au-FexOy dumbbells nanoparticles (DBNPs). The colloidal DBNPs were characterized and deposited on SiO2 to evaluate the effect of Au-FexOy interface on the catalytic activity in CO oxidation (CO+1/2O(2) -> CO2). In particular, we addressed the impact of redox pretreatments in the catalytic activity. Catalytic data showed that the catalyst was not very active after the first oxygen activation but after a reduction step there was a substantial increase in the catalyst activity. A detail characterization showed that DBNPs suffered great morphological and structural changes with the formation of core/shell Au-FexOy structures, in which the FexOy shells were irregular and presented lower crystallinity. The results suggest that the increase in catalytic activity was related to the formation of a more extended Au-FexOy interface after the pretreatments, thereby increasing the amount of active sites. (C) 2016 Elsevier B.V. All rights reserved.
In this work, we applied seeded growth colloidal method to produce Au-FexOydumbbells nanoparticles (DBNPs). The colloidal DBNPs were characterized and deposited on SiO2to evaluate the effect of Au-FexOyinterface on the catalytic activity in CO oxidation (
Subject: Au-fexoy Heterostructures
Dumbbell-like Nanoparticles
Colloidal Synthesis
Heterogeneous Catalysis
Co Oxidation Reaction
Heteroestruturas
Nanoalteres
Catálise heterogênea
Country: Países Baixos
Editor: Elsevier
Citation: Catalysis Today. Elsevier Science Bv, v. 282, p. 151 - 158, 2017.
Rights: fechado
Identifier DOI: 10.1016/j.cattod.2016.06.056
Address: https://www.sciencedirect.com/science/article/pii/S092058611630462X
Date Issue: 2017
Appears in Collections:IQ - Artigos e Outros Documentos

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