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research article

Investigation of a Pt containing washcoat on SiC foam for hydrogen combustion applications

Fernandez, A.
•
Arzac, G. M.
•
Vogt, U. F.
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2016
Applied Catalysis B-Environmental

A commercial Pt based washcoat, used for catalytic methane combustion, was studied supported on a commercial SIC foam as catalytic material (Pt/SiC) for catalytic hydrogen combustion (CHC). Structural and chemical characterization was performed using Electron Microscopy, X-Ray Diffraction (XRD) and X-Ray Photoelectron Spectroscopy (XPS). The reaction was monitored following water concentration by Fourier Transform Infrared spectra (FTIR). The FTIR method was compared with Hy detection by Gas Cromatography (GC) and has shown to be adequate to study the kinetics of the CHC reaction in steady state under our experimental conditions (very lean 1% (v/v) H-2/air mixtures). The catalyst is composed of 5-20 nm disperse Pt nanoparticles decorating a mixture of high surface area Al2O3 and small amounts of ceria supported on the SiC foam which also contains alumina as binder. The Pt/SiC catalytic material has demonstrated to be active enough to start up the reaction in a few seconds at room temperature. The material has been able to convert at least 18.5 L-hydrogen min(-1) gpt (-1) at room temperature in conditions of excess of catalyst. The Pt/SiC material was studied after use using XPS and no significant changes on Pt oxidation states were found. The material was characterized from a kinetic point of view. From the conversion-temperature plot a T-50 (temperature for 50% conversion) of 34 degrees C was obtained. Activation energy measured in our conditions was 35 +/- 1 kl mol(-1). (C) 2015 Elsevier B.V. All rights reserved.

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Type
research article
DOI
10.1016/j.apcatb.2015.06.040
Web of Science ID

WOS:000362379800038

Author(s)
Fernandez, A.
Arzac, G. M.
Vogt, U. F.
Hosoglu, F.
Borgschulte, A.
Jimenez De Haro, M. C.
Montes, O.
Zuettel, A.  
Date Issued

2016

Publisher

Elsevier Science Bv

Published in
Applied Catalysis B-Environmental
Volume

180

Start page

336

End page

343

Subjects

Hydrogen

•

Catalytic combustion

•

FTIR

•

Pt-washcoat

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SiC ceramic foam

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LMER  
Available on Infoscience
February 16, 2016
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/123860
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