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Electrocatalytic activity of ZnCoMo based ionic activators for alkaline hydrogen evolution—Part II

Paper ID Volume ID Publish Year Pages File Format Full-Text
40571 45858 2013 7 PDF Available
Title
Electrocatalytic activity of ZnCoMo based ionic activators for alkaline hydrogen evolution—Part II
Abstract

Nickel electrodes are widely used in industrial water electrolysis cells for electrochemical production of hydrogen. To avoid extensive deactivation problems and enhance the efficiency of the electrolyser cathode, in this work in situ activation is proposed using ionic activator (i.a.) based on combination of three d-metals: Zn, Co and Mo. Polarization curves, obtained at different temperatures (303–343 K), reveal that the addition of ZnCoMo based i.a. did not change reaction mechanism when compared to the HER mechanism on nickel cathode in standard electrolyte. The electrochemical impedance spectroscopy measurements were employed to further investigate the origin of obtained electrocatalytic effect on the HER. The morphology of obtained coatings was examined by scanning electron microscopy.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (82 K)Download as PowerPoint slideHighlights► In situ activation is proposed using ionic activators based on of Zn, Co and Mo. ► Polarization curves revel no change reaction mechanism of the HER. ► The roughness factor values for the ZnCoMo based i.a. are very high. ► SEM images show that the obtained deposits are mostly based on cobalt.

Keywords
Electrolysis; Hydrogen evolution reaction; Ionic activators; EIS; Tafel analysis
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Electrocatalytic activity of ZnCoMo based ionic activators for alkaline hydrogen evolution—Part II
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 451, 31 January 2013, Pages 220–226
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us