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Preparation and Characterization of Metal Sulfide Electro-catalysts for PEM Fuel Cells

Published online by Cambridge University Press:  11 February 2011

Hua Zhang ,
Ysmael Verde-Gómez ,
Allan J. Jacobson ,
Alejandra Ramirez  and
Russell R. Chianelli
Hua Zhang
Affiliation:
Department of Chemistry, University of Houston Houston, TX 77204
Ysmael Verde-Gómez
Affiliation:
Centro de Investigacion en Materiales Avanzados, Chihuahua, Chihuahua, 31109, Mexico.
Allan J. Jacobson
Affiliation:
Department of Chemistry, University of Houston Houston, TX 77204
Alejandra Ramirez
Affiliation:
Materials Research and Technology Institute, University of Texas at El Paso, El Paso, TX 79968
Russell R. Chianelli
Affiliation:
Materials Research and Technology Institute, University of Texas at El Paso, El Paso, TX 79968
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Abstract

Ruthenium sulfide samples were prepared by flowing pure hydrogen sulfide into an aqueous solution of ruthenium chloride followed by further sulfidation in hydrogen sulfide. The final products were characterized by X-ray diffraction and crystallite-sizes were estimated from line broadening. The specific surface areas of catalysts were measured using the multipoint BET method and compositions were determined by thermogravimetric analysis. Ruthenium sulfide loaded gas diffusion electrodes were fabricated by a spraying technique and their electrochemical behavior studied. The electrochemical oxidation of hydrogen was investigated in a three -electrode cell using a ruthenium sulfide loaded gas diffusion electrode as the working electrode with humidified hydrogen containing small amounts of carbon monoxide. Results on the activity and the effects of carbon monoxide with reference to a standard platinum electrode measured at the same conditions show that ruthenium sulfide has a lower activity for hydrogen oxidation but is not susceptible to CO poisoning.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 756: Symposia EE/FF – Solid-State Ionics – Materials for Fuel Cells and Fuel Processors , 2002 , FF5.7
Copyright
Copyright © Materials Research Society 2003

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References

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