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Title: The relation between surface state and reactivity in the DeNO{sub x} mechanism on platinum-based catalysts

Abstract

The selective reduction of nitrogen oxides by hydrocarbon on Pt supported on La{sub 2}O{sub 3}, ZrO{sub 2}, and a mixture of both has been studied. The supports were prepared by a sol-gel technique. Following a standard pretreatment with oxygen and water, it was found that the platinum was existing in a mixture of both oxidized and reduced forms, yet during the course of the reduction reaction, all of the metal became oxidized. A systematic study of the parameters influencing the reaction demonstrated NO{sub 2} is not a reaction intermediate. The metal remains fully oxidized during the course of the reaction and the hydrocarbon is unable to reduce it; therefore the SCR proceeds without NO dissociation.

Authors:
;  [1]
  1. CNRS-ECPM, Strasbourg (France). Lab. d`Etudes de la Reactivite Catalytique
Publication Date:
OSTI Identifier:
687727
Resource Type:
Journal Article
Journal Name:
Journal of Catalysis
Additional Journal Information:
Journal Volume: 186; Journal Issue: 1; Other Information: PBD: 15 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 01 COAL, LIGNITE, AND PEAT; 02 PETROLEUM; NITROGEN OXIDES; SELECTIVE CATALYTIC REDUCTION; PLATINUM; CATALYTIC EFFECTS; LANTHANUM OXIDES; ZIRCONIUM OXIDES; AIR POLLUTION CONTROL

Citation Formats

Pitchon, V., and Fritz, A. The relation between surface state and reactivity in the DeNO{sub x} mechanism on platinum-based catalysts. United States: N. p., 1999. Web. doi:10.1006/jcat.1999.2543.
Pitchon, V., & Fritz, A. The relation between surface state and reactivity in the DeNO{sub x} mechanism on platinum-based catalysts. United States. doi:10.1006/jcat.1999.2543.
Pitchon, V., and Fritz, A. Sun . "The relation between surface state and reactivity in the DeNO{sub x} mechanism on platinum-based catalysts". United States. doi:10.1006/jcat.1999.2543.
@article{osti_687727,
title = {The relation between surface state and reactivity in the DeNO{sub x} mechanism on platinum-based catalysts},
author = {Pitchon, V. and Fritz, A.},
abstractNote = {The selective reduction of nitrogen oxides by hydrocarbon on Pt supported on La{sub 2}O{sub 3}, ZrO{sub 2}, and a mixture of both has been studied. The supports were prepared by a sol-gel technique. Following a standard pretreatment with oxygen and water, it was found that the platinum was existing in a mixture of both oxidized and reduced forms, yet during the course of the reduction reaction, all of the metal became oxidized. A systematic study of the parameters influencing the reaction demonstrated NO{sub 2} is not a reaction intermediate. The metal remains fully oxidized during the course of the reaction and the hydrocarbon is unable to reduce it; therefore the SCR proceeds without NO dissociation.},
doi = {10.1006/jcat.1999.2543},
journal = {Journal of Catalysis},
number = 1,
volume = 186,
place = {United States},
year = {1999},
month = {8}
}