4th INTERNATIONAL WORKSHOP ON ELECTRODEPOSITED NANOSTRUCTURES 16-18 March 2006, Dresden, Germany	ABSTRACTS

MAGNETIC FIELD MODIFICATION OF Co-W ALLOYS FOR HYDROGEN EVOLUTION IN 8 M HOT NaOH P. R. Zabinski, G. Fryc, R. Kowalik AGH University of Science and Technology, Faculty of Non-Ferrous Metals Al. Mickiewicza 30, 30-059 Cracow, Poland Enhancement of cathodic activity of nickel for electrolytic hydrogen evolution has been carried out by the formation of nickel alloys. The activity of cobalt for hydrogen evolution is comparable to that of nickel, and hence there would be a possibility for cobalt to be active electrodes for hydrogen evolution by proper alloying. Tailoring of active cobalt alloy cathodes for hydrogen evolution in a hot concentrated sodium hydroxide solution was attempted by electrodeposition. Enhancement of cathodic activity of cobalt for electrolytic hydrogen evolution has been carried out by the formation of cobalt alloys containing different content of tungsten. The present work aims to obtain amorphous Co-W alloys with high cathodic activity for hydrogen evolution by electrodeposition. We try to clarify the effect of the tungsten addition in enhancing the activity for hydrogen evolution and in changing the morphology of electrodeposits. External magnetic field generated by permanent magnet was used in order to modify composition and morphology of alloy. The changes in morphology and composition of alloys was searched in order to determine influence of magnetic field on electrodeposition of alloys.

 
 
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