NiGa modified carbon-felt cathode for hydrogen production

KOCA M. B. , CELIK G. G. , KARDAŞ G. , Yazici B.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, cilt.44, ss.14157-14163, 2019 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 44 Konu: 27
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1016/j.ijhydene.2018.09.031
  • Sayfa Sayıları: ss.14157-14163


In this study, known electrocatalytic active metal nickel and low amount of gallium were electrodeposited on carbon felt electrode for hydrogen evolution reaction in alkali medium. Morphological and structural analyses of prepared electrodes were determined by scanning electron microscopy and energy dispersive X-ray spectroscopy. The electrocatalytic activity of obtained electrodes for hydrogen evolution reaction was determined with cathodic polarization curves, electrochemical impedance spectroscopy, discharge potential measurements, hydrogen volume measurements at constant potential and durability tests. It was found that the electrodeposition of low amount of gallium over the nickel coated carbon felt electrode increases the hydrogen evolution reaction activity and decreases the overpotential for hydrogen region. The electrocatalytic activity of nickel and gallium deposited on carbon felt electrode was explained with active sites of surface and synergistic effect of nickel and gallium created by high surface area of carbon felt. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.