4.7 Article

Effect of carbon content on Ni-Fe-C electrodes for hydrogen evolution reaction in seawater

Journal

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 35, Issue 19, Pages 10060-10066

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2010.08.003

Keywords

Electrodeposition; Ni-Fe-C coating; Hydrogen evolution reaction; Catalytic activity

Funding

  1. National High-Tech Program (863) of China [2007AA05Z103]

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Hydrogen evolution reaction (HER) on the Ni-Fe-C electrodes electrodeposited at current density ranging from 100 to 300 A/m(2), as well as their electrochemical properties in 3.5% NaCl solution at 90 degrees C and pH = 12, had been investigated by polarization measurements, EIS technique. It was shown that the carbon content and grain size of Ni-Fe-C coatings are affected by current density. In addition, the hydrogen evolution overpotential of Ni-Fe-C electrodes was related with carbon content and grain size. The Ni-Fe-C electrodes with optimum catalytic activity for the HER were found to contain the maximum carbon content 1.59% and the minimum grain size 3.4 nm. The results of a comparative analysis between carbon content and intrinsic activity are that carbon content plays an important role in intrinsic activity of Ni-Fe-C electrodes. Crown Copyright (C) 2010 Published by Elsevier Ltd on behalf of Professor T. Nejat Veziroglu. All rights reserved.

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