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Vapour Phase Formic Acid Decomposition over PdAu/γ-Al2O3 Catalysts: Effect of Composition of Metallic Particles Full article

Journal Journal of Catalysis
ISSN: 0021-9517 , E-ISSN: 1090-2694
Output data Year: 2013, Volume: 299, Pages: 171-180 Pages count : 10 DOI: 10.1016/j.jcat.2012.12.009
Tags Alloys, Core-shell structure, Formic acid, Fuel cells, Hydrogen, Inhibition by CO
Authors Bulushev Dmitri A. 1,2 , Beloshapkin Sergey 2 , Plyusnin Pavel E. 3 , Shubin Yurii V. 3 , Bukhtiyarov Valerii I. 4 , Korenev Sergey V. 3 , Ross Julian R.H. 1
Affiliations
1 Chemical & Environmental Sciences Department, University of Limerick, Limerick, Ireland
2 Materials & Surface Science Institute, University of Limerick, Limerick, Ireland
3 Nikolaev Institute of Inorganic Chemistry, SB RAS, Novosibirsk 630090, Russia
4 Boreskov Institute of Catalysis, SB RAS, Novosibirsk 630090, Russia

Funding (5)

1 Russian Foundation for Basic Research 11-03-00668
2 Siberian Branch of the Russian Academy of Sciences 112
3 The Ministry of Education and Science of the Russian Federation П960
4 Science Foundation Ireland 06/CP/E007
5 Government of Ireland

Abstract: A series of 1.8 wt.% PdAu/γ-Al2O3 catalysts with a mean metal particle size of more than 10 nm and different Pd/Au ratios were prepared by impregnation followed by hydrazine reduction and tested in the decomposition of vapour phase formic acid (2.2 vol.%, 1 bar) with and without added CO to the gas mixture. The catalytic activity was correlated with the bulk (AAS, XRD, EDS/TEM) and surface (XPS) composition of PdAu particles. A novel result was obtained that the surface composition of the particles did not change despite a considerable variation of the Au atomic fraction and it was found to be close to that of the Pd2Au alloy. The activity of the Au/Al2O3 catalyst was negligible compared with that of the Pd/Al2O3 catalyst being a factor of 65 lower per gram of metal at 403 K. The surface electronic properties (XPS) and the catalytic activity of the Pd2Au layer calculated per one surface Pd atom (TOF) did not depend on the bulk composition of the metal particles. A lower activity of the Pd2Au layer as compared with the pure Pd layer (2–3 times) was observed, but the activation energies for the Pd and PdAu catalysts were similar (40 kJ mol−1) and were lower than that for the Au/Al2O3 catalyst (62 kJ mol−1). Addition of CO led to a considerable inhibition of the reaction for all PdAu catalysts, this being accompanied by an increase in the activation energy to 69 kJ mol−1.
Cite: Bulushev D.A. , Beloshapkin S. , Plyusnin P.E. , Shubin Y.V. , Bukhtiyarov V.I. , Korenev S.V. , Ross J.R.H.
Vapour Phase Formic Acid Decomposition over PdAu/γ-Al2O3 Catalysts: Effect of Composition of Metallic Particles
Journal of Catalysis. 2013. V.299. P.171-180. DOI: 10.1016/j.jcat.2012.12.009 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
Submitted: Sep 7, 2012
Accepted: Dec 9, 2012
Published online: Jan 18, 2013
Published print: Mar 1, 2013
Identifiers:
Web of science: WOS:000316774900018
Scopus: 2-s2.0-84873656135
Elibrary: 20433264
Chemical Abstracts: 2013:259976
Chemical Abstracts (print): 158:313549
OpenAlex: W2065879689
Citing:
DB Citing
Web of science 45
Scopus 46
Elibrary 45
OpenAlex 45
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