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Title: A transient kinetic study of the mechanism of the NO + H{sub 2} reaction over Pt/SiO{sub 2} catalysts. 2: Characteristic features of SSITKA profiles

Abstract

SSITKA profiles obtained for the NO + H{sub 2} reaction on a 5% Pt/SiO{sub 2} catalyst at low temperatures are analyzed in an attempt to gain insight into the reaction mechanism at the molecular level, specifically for the formation of N{sub 2}, N{sub 2}O, and NH{sub 3} Three different analyses are introduced which give information about the nature of the reaction network and the final intermediates on the Pt surface under reaction conditions. These are (a) the initial distribution of isotopic molecules of product (IDIMP), (b) the temporal redistribution of isotopic product (TRIMP), and (c) the semilogarithmic plot of ({bar {alpha}}) versus time. The first two analyses (IDIMP and TRIMP) are discussed in terms of types of production of two atom labelled product molecules. The authors also introduce the integral characteristics of a reaction mechanism, i.e., the coefficient of percolation (C{sub PE}) and the coefficient of production (C{sub PR}). The conclusions, along with the experimental data, are used to develop a reaction mechanism for the formation of N{sub 2}, N{sub 2}O, and NH{sub 3} from Pt catalysts in the NO + H{sub 2} reaction.

Authors:
; ;  [1]
  1. Univ. of Reading, Whiteknights (United Kingdom). Chemistry Dept.
Publication Date:
OSTI Identifier:
687745
Resource Type:
Journal Article
Journal Name:
Journal of Catalysis
Additional Journal Information:
Journal Volume: 186; Journal Issue: 2; Other Information: PBD: 10 Sep 1999
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; NITRIC OXIDE; HYDROGENATION; PLATINUM; SILICON OXIDES; CATALYTIC EFFECTS; CHEMICAL REACTION KINETICS

Citation Formats

Shestov, A.A., Burch, R., and Sullivan, J.A. A transient kinetic study of the mechanism of the NO + H{sub 2} reaction over Pt/SiO{sub 2} catalysts. 2: Characteristic features of SSITKA profiles. United States: N. p., 1999. Web. doi:10.1006/jcat.1999.2567.
Shestov, A.A., Burch, R., & Sullivan, J.A. A transient kinetic study of the mechanism of the NO + H{sub 2} reaction over Pt/SiO{sub 2} catalysts. 2: Characteristic features of SSITKA profiles. United States. doi:10.1006/jcat.1999.2567.
Shestov, A.A., Burch, R., and Sullivan, J.A. Fri . "A transient kinetic study of the mechanism of the NO + H{sub 2} reaction over Pt/SiO{sub 2} catalysts. 2: Characteristic features of SSITKA profiles". United States. doi:10.1006/jcat.1999.2567.
@article{osti_687745,
title = {A transient kinetic study of the mechanism of the NO + H{sub 2} reaction over Pt/SiO{sub 2} catalysts. 2: Characteristic features of SSITKA profiles},
author = {Shestov, A.A. and Burch, R. and Sullivan, J.A.},
abstractNote = {SSITKA profiles obtained for the NO + H{sub 2} reaction on a 5% Pt/SiO{sub 2} catalyst at low temperatures are analyzed in an attempt to gain insight into the reaction mechanism at the molecular level, specifically for the formation of N{sub 2}, N{sub 2}O, and NH{sub 3} Three different analyses are introduced which give information about the nature of the reaction network and the final intermediates on the Pt surface under reaction conditions. These are (a) the initial distribution of isotopic molecules of product (IDIMP), (b) the temporal redistribution of isotopic product (TRIMP), and (c) the semilogarithmic plot of ({bar {alpha}}) versus time. The first two analyses (IDIMP and TRIMP) are discussed in terms of types of production of two atom labelled product molecules. The authors also introduce the integral characteristics of a reaction mechanism, i.e., the coefficient of percolation (C{sub PE}) and the coefficient of production (C{sub PR}). The conclusions, along with the experimental data, are used to develop a reaction mechanism for the formation of N{sub 2}, N{sub 2}O, and NH{sub 3} from Pt catalysts in the NO + H{sub 2} reaction.},
doi = {10.1006/jcat.1999.2567},
journal = {Journal of Catalysis},
number = 2,
volume = 186,
place = {United States},
year = {1999},
month = {9}
}