Advanced

In situ structure-activity correlation experiments of the ruthenium catalyzed CO oxidation reaction

Over, H.; Balmes, O. and Lundgren, Edvin LU (2009) Workshop of the European-Synchrotron-Radiation-Facility, 2009 In Catalysis Today 145(3-4). p.236-242
Abstract
The complex structure-activity correlation of the CO oxidation on ruthenium has been studied in a batch reactor by using in situ surface X-ray diffraction (SXRD) and on-line mass spectrometry. Two distinct active phases are identified at higher pressures in the mbar range depending on the reaction conditions: a non-oxidic phase and a RuO2(1 1 0) layer of variable thickness ranging from 1.5 nm to 10 nm. For reaction temperatures lower than 520 K the experimental turnover frequency (TOF) numbers are shown to be almost identical for the two types of active phases. Above 520 K the RuO2(1 1 0) layer turned out to be much more active than the non-oxidic phase. Kinetic reaction experiments on the RuO2(1 1 0) phase reveal an activation energy of... (More)
The complex structure-activity correlation of the CO oxidation on ruthenium has been studied in a batch reactor by using in situ surface X-ray diffraction (SXRD) and on-line mass spectrometry. Two distinct active phases are identified at higher pressures in the mbar range depending on the reaction conditions: a non-oxidic phase and a RuO2(1 1 0) layer of variable thickness ranging from 1.5 nm to 10 nm. For reaction temperatures lower than 520 K the experimental turnover frequency (TOF) numbers are shown to be almost identical for the two types of active phases. Above 520 K the RuO2(1 1 0) layer turned out to be much more active than the non-oxidic phase. Kinetic reaction experiments on the RuO2(1 1 0) phase reveal an activation energy of 78 +/- 10 kJ/mol which is in perfect agreement with corresponding reactivity experiments on supported and powder RuO2 catalyst. Under oxidizing reaction conditions and high concentration of CO2 in the gas mixture, the RuO2(1 1 0) model catalyst shows reversible product-poisoning. (C) 2008 Elsevier B.V. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Structure-activity correlation, Kinetic data, Ru-oxide, CO oxidation
in
Catalysis Today
volume
145
issue
3-4
pages
236 - 242
publisher
Elsevier
conference name
Workshop of the European-Synchrotron-Radiation-Facility, 2009
external identifiers
  • wos:000269006900008
  • scopus:67651036429
ISSN
0920-5861
DOI
10.1016/j.cattod.2008.10.048
language
English
LU publication?
yes
id
903f6941-f22b-46b8-bf98-09b12c71804f (old id 1477381)
date added to LUP
2009-09-22 15:38:04
date last changed
2017-11-12 03:45:17
@inproceedings{903f6941-f22b-46b8-bf98-09b12c71804f,
  abstract     = {The complex structure-activity correlation of the CO oxidation on ruthenium has been studied in a batch reactor by using in situ surface X-ray diffraction (SXRD) and on-line mass spectrometry. Two distinct active phases are identified at higher pressures in the mbar range depending on the reaction conditions: a non-oxidic phase and a RuO2(1 1 0) layer of variable thickness ranging from 1.5 nm to 10 nm. For reaction temperatures lower than 520 K the experimental turnover frequency (TOF) numbers are shown to be almost identical for the two types of active phases. Above 520 K the RuO2(1 1 0) layer turned out to be much more active than the non-oxidic phase. Kinetic reaction experiments on the RuO2(1 1 0) phase reveal an activation energy of 78 +/- 10 kJ/mol which is in perfect agreement with corresponding reactivity experiments on supported and powder RuO2 catalyst. Under oxidizing reaction conditions and high concentration of CO2 in the gas mixture, the RuO2(1 1 0) model catalyst shows reversible product-poisoning. (C) 2008 Elsevier B.V. All rights reserved.},
  author       = {Over, H. and Balmes, O. and Lundgren, Edvin},
  booktitle    = {Catalysis Today},
  issn         = {0920-5861},
  keyword      = {Structure-activity correlation,Kinetic data,Ru-oxide,CO oxidation},
  language     = {eng},
  number       = {3-4},
  pages        = {236--242},
  publisher    = {Elsevier},
  title        = {In situ structure-activity correlation experiments of the ruthenium catalyzed CO oxidation reaction},
  url          = {http://dx.doi.org/10.1016/j.cattod.2008.10.048},
  volume       = {145},
  year         = {2009},
}