Surface Protonic Conduction in Porous Alkaline Earth Zirconate Perovskites CaZrO3, SrZrO3, and BaZrO3

Conduction of protons in chemisorbed and physisorbed water layers on the surface of AZrO 3 (A = Ca, Sr, Ba) perovskite oxides, depending on compositions (A-site cations and deficiency) and microstructures (controlled by sintering conditions).