Crystal structure, vibrational and thermal behavior of Ba(NH4)[Co(CN)6]·4H2O: A new precursor for the synthesis of hexagonal BaCoO3

An Active and Robust Air Electrode for Reversible Protonic Ceramic Electrochemical Cells

“…39 Figure S3 shows the XRD patterns of the air electrodes before and after the 500 h durability tests in 40% H 2 O at 700 °C. A new phase, identified as hexagonal BaCoO 3−δ , 44 appeared in the PBCC electrode, but no secondary phase was observed in both the PBSCF and the NBSCF electrodes after the test. This is also confirmed by the Raman spectra (Figure 2d), where a peak corresponding to the BCO phase 45 appeared at 614 cm −1 after exposure to 40% H 2 O at 700 °C for 500 h. Exsolved BCO nanoparticles on the surface of PBCC were further confirmed by microanalysis via SEM, TEM, and EDX, as shown in Figure 2e.…”