fig8

Figure 8. (A) The activation process of proton conduction in oxides; (B) Schematic workflow to screen the unconventional proton-conducting oxides; (C) and (D) Proton conductivities and H-D isotope effects of predicted Bi_10.8Pb_1.2SiO_20-δ and Bi_3.6Sr_0.4Ge₃O_12-δ oxides. Reproduced with permission from Fujii et al.^[63] Copyright 2023 John Wiley & Sons.