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Stability of WC Nanoparticles for NOx Reduction

Published online by Cambridge University Press:  01 February 2011

A.K. Rumaiz ,
S.I. Shah ,
H.Y. Lin ,
I. Baldytchev  and
J.G. Chen
A.K. Rumaiz
Affiliation:
Department of Physics and Astronomy University of Delaware, Newark DE 19716
S.I. Shah
Affiliation:
Department of Physics and Astronomy University of Delaware, Newark DE 19716 Department of Materials Science and Engineering University of Delaware, Newark DE 19716
H.Y. Lin
Affiliation:
Department of Civil and Environmental Engineering University of Delaware, Newark DE 19716
I. Baldytchev
Affiliation:
Department of Materials Science and Engineering University of Delaware, Newark DE 19716
J.G. Chen
Affiliation:
Department of Chemical Engineering University of Delaware, Newark DE 19716
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Abstract

WC nanoparticles where synthesized using various Physical Vapor Deposition (PVD) methods such as reactive sputtering and Pulsed Laser Deposition (PLD). In both the methods the metal flux obtained is condensed in the presence of He gas. The structural properties of the samples where investigated using X-ray Diffraction (XRD) and X-ray Photoelectron Spectroscopy (XPS). The feasibility of using nano-WC as an alternative catalyst for Pt is determined. A comparative study on two sample of WC, as-prepared and carburized W, was done. The samples were used to check for the reduction of NOx in a simple reactor. The carburized W shows activity at temperatures around 400°C whereas the as-prepared WC shows activity towards NOx reduction at a slightly higher temperature. The stability of both the sample was studied by performing the same experiment at a fixed temperature for an extended period of time. XPS and XRD confirm the formation of oxide phase after de-NOx experiments.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 854: Symposium U – Stability of Thin Films and Nanostructures , 2004 , U8.7
Copyright
Copyright © Materials Research Society 2005

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References

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