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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.)

Control of diesel particulate emission based on Ag/CeOx/FeOy catalysts supported on cordierite

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Author(s):
Nascimento, L. F. [1] ; Lima, J. F. [2] ; de Sousa Filho, P. C. [1, 3] ; Serra, O. A. [1]
Total Authors: 4
Affiliation:
[1] Univ Sao Paulo, Dept Chem, Fac Filosofia Ciencias & Letras Ribeirao Preto, BR-14040901 Ribeirao Preto - Brazil
[2] Univ Estado Rio De Janeiro, Inst Chem, BR-20550900 Rio De Janeiro - Brazil
[3] Univ Paris Saclay, Ecole Polytech, Lab Phys Matiere Condensee, Solid State Chem Grp, Route Saclay, F-91128 Palaiseau - France
Total Affiliations: 3
Document type: Journal article
Source: CHEMICAL ENGINEERING JOURNAL; v. 290, p. 454-464, APR 15 2016.
Web of Science Citations: 12
Abstract

In this study, we propose that ceria-based catalysts are capable to diminish the temperature at which the soot combustion occurs to values within the operation range of diesel engines exhaust gases. We investigated how the addition of 5 wt.% silver nanoparticles (Ag NPs) loading the CeOx/FeOy (1.5 <= x <= 2 and 1 <= y <= 1.5) catalyst affects the combustion temperature of the soot. The sol-gel methodology was used to synthesize catalysts based on ceria-iron oxide (CeOx/FeOy) modified with Ag NPs, which were obtained by reverse microemulsion synthesis, and then deposited on cordierite support. Morphological and structural properties of the nanostructured Ag-modified CeOx/FeOy catalysts were evaluated by BET, XRD, OSC, SEM, TEM, and Raman spectroscopy. Catalytic tests show that addition of Ag NPs to the CeOx/FeOy catalysts leads to a significant reduction of about 300 degrees C in the soot oxidation temperature. This is due to the synergistic effect between the oxide and metal phases, which leads to a higher surface oxygen mobility. As a result, we obtained catalysts with improved redox ability that exhibit high performances in diesel soot oxidation at lower temperatures, which is a highly interesting prospect for the improvement of currently used particulate filters. (C) 2016 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 14/22930-2 - Rare Earth-based colloidal luminescent nanoparticles: fundamental studies at the single particle scale and applications as biolabels
Grantee:Paulo Cesar de Sousa Filho
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor