International Journal of Hydrogen Energy, Vol.30, No.8, 913-917, 2005
Comments on: The phase-shift method for determining Langmuir adsorption isotherms of over-potentially deposited hydrogen for the cathodic H-2 evolution reaction at poly-Re/aqueous electrolyte interfaces [Hydrogen Energy 30 (2005) 485-499]
Simulations of the impedance data for the hydrogen evolution reaction have been carried out. They indicate that there is no relation between the phase-shift and the surface coverage by adsorbed hydrogen. The surface coverage may only be obtained form the rate constants of the hydrogen adsorption and desorption steps. © 2005 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
Keywords:hydrogen evolution reaction;electrochemical impedance spectroscopy;phase-shift method;surface coverage;adsorption isotherms