Ceria and Ce0.95M0.05O2 − δ mixed oxides (M = La, Pr, Zr): Vacancies and reducibility study

When increasing calcination temperature, it was observed an improved specific surface and crystallite diameter conservation for La and Zr-doped samples. Oxygen vacancy generated by doping, observed both by Raman and OSC-OSCC, decreased with higher calcination temperatures for every solid. Ce0.95Pr0.05O2 − δ showed a maximum oxygen storage capacity for 750 °C calcination temperature consistent with Raman spectroscopy and hydrogen reduction profiles.