Q1: when evaluating the stability in a CO₂ environment, should the possible products of BaZrO₃ in this CO₂ environment, such as BaCO₃, have their energies calculated? Or is it sufficient to only calculate the energy of BaZrO₃ and the chemical potential of CO₂, and then proceed with the calculation of Energy above hull.
Q2: How to determine the threshold for Eabove_hull(anode/cathode/CO2) to screening potential material for proton conductor (such as 40 meV/atom).