. The adsorbent nature in the NA model, eq. (6-7), is given directly only by parameters ε a and V 2 , 5 S is indirectly related to the matrix element. In case of the ions, as the data show (Supplementary Material of ref. ) for O 2 and intermediates of oxygen reduction OH and OOH, the matrix element increases significantly due to the contribution of the electron-nuclear interaction. That is why we will evaluate the influence of, first of all, V 2 and then ε a on E ads .