Response to comments on: The phase-shift method for determining Langmuir adsorption isotherms of over-potentially deposited hydrogen for the cathodic H2 evolution reaction at poly-Re/aqueous electrolyte interfaces: [Hydrogen Energy 30 (2005) 485–499]

The phase-shift method, i.e., a linear relationship between the behavior ( - ϕ vs. E) of the phase shift ( 0 ∘ ⩽ - ϕ ⩽ 90 ∘ ) for the optimum intermediate frequency and that ( θ vs. E) of the fractional surface coverage ( 1 ⩾ θ ⩾ 0 ) of under-potentially deposited hydrogen and over-potentially deposited hydrogen for the cathodic H 2 evolution reaction at noble and transition-metal/aqueous electrolyte interfaces, has been suggested and confirmed using cyclic voltammetric, linear sweep voltammetric or differential pulse voltammetric, and electrochemical impedance spectroscopic techniques. The comment on the phase-shift method by Lasia is discussed. The lack of a single equation for ϕ vs. θ as a function of potential (E) and frequency ( f ) and the unsuitable values of the electrode kinetic parameters ( k , θ , β , η ) and the equivalent circuit elements given in the comment result in a confused conclusion on the phase-shift method. The conclusion in the comment on the phase-shift method is unacceptable.