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Electrocatalytically active Co–W and Co–W–C alloys electrodeposited in a magnetic field

The main aim of the studies was to establish the parameters of electrolysis corresponding to the lowest value of overpotential of HER (hydrogen evolution reaction). The influence of sodium tungstate concentration, arginine concentration and orientation of applied magnetic field (MF) on composition,...

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Published in:	Electrochimica acta 2013-08, Vol.104, p.542-548
Main Authors:	Żabiński, P., Mech, K., Kowalik, R.
Format:	Article
Language:	English
Subjects:	Alloys Carbon Catalytic activity Cobalt base alloys Concentration (composition) Co–W alloys Co–W–C alloys Deposition Electrocatalysis Electrodeposition Hydrogen evolution Magnetic fields
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container_title	Electrochimica acta
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creator	Żabiński, P. Mech, K. Kowalik, R.
description	The main aim of the studies was to establish the parameters of electrolysis corresponding to the lowest value of overpotential of HER (hydrogen evolution reaction). The influence of sodium tungstate concentration, arginine concentration and orientation of applied magnetic field (MF) on composition, morphology, structure, cathodic current efficiency of deposition process and electrocatalytic activity of deposited alloys was examined. Carbon addition to electrodeposited Co–W alloys was made to enhance the electrolytic activity of hydrogen evolution process in 8moldm−3 NaOH at 90°C. The alloys were deposited at pH=4. The concentration of Na2WO4·2H2O corresponding to the best catalytic activity of the obtained Co–W and Co–W–C alloys was 25g/l. The positive effect of carbon addition on catalytic activity of hydrogen evolution was observed. The influence of electrodeposition parameters on size of microcracks formed during deposition processes was also investigated.
doi_str_mv	10.1016/j.electacta.2012.11.047
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subjects	Alloys Carbon Catalytic activity Cobalt base alloys Concentration (composition) Co–W alloys Co–W–C alloys Deposition Electrocatalysis Electrodeposition Hydrogen evolution Magnetic fields
title	Electrocatalytically active Co–W and Co–W–C alloys electrodeposited in a magnetic field
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