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Type: Artigo de periódico
Title: Designing Pt nanoparticles supported on CeO2-Al2O3 Synthesis, characterization and catalytic properties in the steam reforming and partial oxidation of methane
Author: Prieto, PJS
Ferreira, AP
Haddad, PS
Zanchet, D
Bueno, JMC
Abstract: Platinum nanoparticles (Pt-NPs) of about 3 nm were synthesized by colloidal methods and encapsulated in mesoporous Al2O3 and CeO2-Al2O3 prepared by sol-gel method A new strategy to synthesize Pt clusters of uniform size supported on mixed oxides was achieved and the catalysts were characterized by Fourier transform Infrared spectroscopy of adsorbed CO transmission electron microscopy and X-ray absorption fine structure spectroscopy and tested in steam reforming of methane (SRM) and partial oxidation of methane (POM) Pt-NPs were well dispersed on the supports and there was no significant modification of their size during calcination and under POM conditions In the SRM the CH4 turnover rate on the Pt-NPs/CeO2-Al2O3 catalyst was twice higher than the one on the Pt-NPs/Al2O3 catalyst despite their similar Pt-NP sizes The use of colloidal Pt-NPs to produce nanocatalysts with similar particle size clearly pointed out the important role of the CeO2 in promoting the catalytic activity (C) 2010 Elsevier Inc All rights reserved
Subject: Pt catalysts
CeO2-Al2O3 carriers
Pt nanoparticles
Methane oxyforming reactions
Steam reforming of methane
Partial oxidation of methane
Country: EUA
Editor: Academic Press Inc Elsevier Science
Rights: fechado
Identifier DOI: 10.1016/j.jcat.2010.09.025
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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