Preparation, characterization and application of alkaline leached CuNiZn ternary coatings for long-term electrolysis in alkaline solution
Abstract
The NiCuZn ternary coating was electrochemically deposited on a copper electrode. Then, it was etched in a concentrated alkaline solution (30% NaOH) to produce a porous and electrocatalytic surface suitable for use in the hydrogen evolution reaction (HER). The surface composition of coating before and after alkaline leaching was determined by energy dispersive X-ray (EDX) analysis. The surface morphologies were investigated by scanning electron microscopy (SEM). The long-term stability of electrode prepared for alkaline water electrolysis was investigated in 1 M KOH solution with the help of cathodic current-potential curves and electrochemical impedance spectroscopy (EIS) techniques. It was found that, the NiCuZn coating has a compact and porous structure with good physical stability. Alkaline leaching process further improved the activity of NiCuZn coating in comparison with binary NiCu deposit for the HER. The long-term operation at -100 mA cm-2 showed good electrochemical stability over 120 h. © 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
URI
https://www.scopus.com/inward/record.uri?eid=2-s2.0-77957262515&doi=10.1016%2fj.ijhydene.2010.07.145&partnerID=40&md5=c310568af3bc709e33728b2a3a5b61f5http://acikerisim.bingol.edu.tr/handle/20.500.12898/5077
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