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Topics in Catalysis

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01-05-2013 | Original Paper

Promising Stability of Gold-Based Catalysts Prepared by Direct Anionic Exchange for DeNO_x Applications in Lean Burn Conditions

Authors: D.-L. Nguyen, S. Umbarkar, M. K. Dongare, C. Lancelot, J.-S. Girardon, C. Dujardin, P. Granger

Published in: Topics in Catalysis | Issue 1-8/2013

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Abstract

Supported gold catalysts on γ-Al₂O₃ have been investigated in the catalytic reduction of NO_x in simulated Diesel exhaust gas conditions. Different parameters have been examined essentially the mode of gold incorporation via classical deposition–precipitation and anionic exchange methods and the nature of the pre-activation thermal treatment. The resistance to thermal ageing under reactive conditions at 500 °C was found completely different with a significant rate enhancement on anionic-exchange samples. Further comparisons also show that the nature of the pre-activation thermal treatment influences the extent of surface reconstructions during thermal ageing with a detrimental effect of reductive pre-treatment on the catalytic performances.

previous article Reaction Pathways for Ammonia Formation on Lean NOx Trap/Reduction System: A Spectroscopic Infrared Investigation

next article Insight into the Role of Electropositive Promoters in Emission Control Catalysis: An In Situ DRIFTS Study of NO Reduction by C3H6 Over Na-Promoted Pt/Al2O3 Catalysts

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Title: Promising Stability of Gold-Based Catalysts Prepared by Direct Anionic Exchange for DeNO x Applications in Lean Burn Conditions
Authors: D.-L. Nguyen
S. Umbarkar
M. K. Dongare
C. Lancelot
J.-S. Girardon
C. Dujardin
P. Granger
Publication date: 01-05-2013
Publisher: Springer US
Published in: Topics in Catalysis / Issue 1-8/2013
Print ISSN: 1022-5528
Electronic ISSN: 1572-9028
DOI: https://doi.org/10.1007/s11244-013-9946-z

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