CO induced surface segregation as a means of improving surface composition and enhancing performance of CuPd bimetallic catalysts
Publication type: Journal Article
Publication date: 2015-09-01
scimago Q1
wos Q1
SJR: 1.558
CiteScore: 10.9
Impact factor: 6.5
ISSN: 00219517, 10902694
Catalysis
Physical and Theoretical Chemistry
Abstract
A series of copper rich CuPd/Al2O3 catalysts were prepared and characterised by FTIR spectroscopy using CO as a probe molecule. After reduction, the surface composition was largely composed of Cu with evidence of a small concentration of isolated Pd atoms. It was found that CO induced surface segregation could be used to increase the surface Pd concentration and depending on the Cu:Pd ratio, the formation of Pd–Pd dimers was possible. Changes in surface composition were quantified and correlated with catalyst activity and selectivity for selective acetylene hydrogenation. For the catalyst with optimum Cu:Pd ratio (50:1), it was possible to use CO induced segregation to increase activity considerably (20 K temperature reduction to achieve 100% conversion) whilst only marginally affecting ethylene selectivity (≈5% decrease in ethylene selectivity). An estimate of the detection limit by FTIR of the minimum surface coverage of isolated Pd and Pd–Pd dimers is given.
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Mccue A. J., Anderson J. A. CO induced surface segregation as a means of improving surface composition and enhancing performance of CuPd bimetallic catalysts // Journal of Catalysis. 2015. Vol. 329. pp. 538-546.
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Mccue A. J., Anderson J. A. CO induced surface segregation as a means of improving surface composition and enhancing performance of CuPd bimetallic catalysts // Journal of Catalysis. 2015. Vol. 329. pp. 538-546.
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TY - JOUR
DO - 10.1016/j.jcat.2015.06.002
UR - https://doi.org/10.1016/j.jcat.2015.06.002
TI - CO induced surface segregation as a means of improving surface composition and enhancing performance of CuPd bimetallic catalysts
T2 - Journal of Catalysis
AU - Mccue, Alan J
AU - Anderson, J. A.
PY - 2015
DA - 2015/09/01
PB - Elsevier
SP - 538-546
VL - 329
SN - 0021-9517
SN - 1090-2694
ER -
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@article{2015_Mccue,
author = {Alan J Mccue and J. A. Anderson},
title = {CO induced surface segregation as a means of improving surface composition and enhancing performance of CuPd bimetallic catalysts},
journal = {Journal of Catalysis},
year = {2015},
volume = {329},
publisher = {Elsevier},
month = {sep},
url = {https://doi.org/10.1016/j.jcat.2015.06.002},
pages = {538--546},
doi = {10.1016/j.jcat.2015.06.002}
}