Features of the electrochemical reaction of hydrogen oxidation on the composite SrFeO ₃ ‐based anode for a protonic ceramic fuel cell

Abstract

BaCeO 3 -based proton-conducting electrolytes was studied for the first time. Despite the high electronic and oxygen-ionic conductivity in the SFM-SDC, its electrochemical performance was not satisfactory, while the presence of the proton-conducting phase and exsolved nickel particles on the SFNM-BCGC electrode increased the electrochemical activity about 3 to 5 times. In series SFM-SDC, SFM-BCGC, SFNM-BCGC the polarization resistance was about 1.06, 0.54, 0.37 Ohm cm 2 at 800 C and 10.02, 3.55, 2.12 Ohm cm 2 at 600 C in wet hydrogen. The presence of sufficient proton conductivity in the electrode is supposed to be crucial for the efficient performance of the anodes in contact with proton-conducting oxides.

Sintering Aid Strategy for Promoting Oxygen Reduction Reaction on High-Performance Double-Layer LaNi0.6Fe0.4O3–δ Composite Electrode for Devices Based on Solid-State Membranes

“…The BaCe 0.89 Gd 0.1 Cu 0.01 O 3–δ proton-conducting electrolyte (hereafter BCGC) with a final synthesis temperature of 1400 °C for 5 h was obtained by the solid phase method according to the procedure described in [ 36 ]. According to the XRD data, the BCGC was single-phase ( Figure 1 a) with a relative density of about 96%.…”