Application of a deep eutectic solvent to prepare nanocrystalline Ni and Ni/TiO2 coatings as electrocatalysts for the hydrogen evolution reaction
By Protsenko, V. S.; Bogdanov, D. A.; Korniy, S. A.; Kityk, A. A.; Baskevich, A. S.; Danilov, F. I.
Published in International Journal of Hydrogen Energy
2019
Abstract
The paper reports the electrochemical deposition of nanocrystalline nickel and composite nickel-titania films as effective electrocatalysts for the hydrogen evolution reaction. To produce the composite Ni/TiO2 electrodeposits, a plating bath based on a deep eutectic solvent, a novel kind of ionic liquids, was used for the first time. The electrolyte contained ethaline (a eutectic mixture of choline chloride and ethylene glycol), 1 M NiCl2?6H2O and the addition of extra water (3, 6, 9 mol dm?3). Titania dispersed phase was introduced into the electrolyte as nanopowder Degussa P 25 (0
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