Preparation of the SrCe0.95Yb0.05O3?? proton conductor and study of the electrokinetics at the SrCe0.95Yb0.05O3??/Pd interface

Electrode polarization measurements in the Fe|SrCe0.95Yb0.05O2.975|Au proton conducting solid electrolyte cell

“…The calculate activation energies for the present system (Fe/SCY) were close to Pd and Au electrodes but lower to the corresponding activation energies reported for the Pt, Ni and Ag/SCY interfaces [10][11][12][13][14][15][16][17][18][19][20]. It should be pointed out, however, that even when obtained under the same experimental conditions, the literature values are not in good quantitative agreement.…”

“…However, in the case of hydrogen oxidation reaction, n equals either to unity or to two depending on the type of hydrogen, either atomic or molecular, that participates in the rate determining step. Nevertheless, as reported in literature, hydrogen is dissociatively adsorbed on the electrode's surface and participates as hydrogen ad-atom in the charge transfer reaction [11][12][13][14][15][16][17][18][19][20]. Consequently, in the following analysis, n is considered equal to unity.…”

“…Specifically, electrode kinetics has been examined over Au, Ni, Pt, Pd and Ag electrodes [11][12][13][14][15][16][17][18][19][20]. However, comparison of all studies is difficult due to existing differences in experimental conditions, electrode preparation methods and different techniques employed to calculate the ohmic-free overpotentials.…”

Electrode polarization at the Pd/proton conductor interface

“…1. More details can be found in previous communications [12,13]. SEM images of the freshly prepared Pd electrodes on SCY and SZY surfaces are presented in Fig.…”