Figure also addresses criteria (iii), facile acUvaUon of N2 as the two x-axes. The surface nitride (in parUcular, the N vacancy site) must bind N strongly enough to rapidly dissociate N2, ideally under ambient condiUons. To address this, we assume a BEP scaling found in transiUon metals to map the calculated Δ𝐸 , values to acUvaUon barriers for N2 dissociaUon. Here, we find 𝐸 -, , ! 01&&2+. ≈ 1.56Δ𝐸 , + 1.38, in units of eV. To determine the upper x-axis of Figure , we solve the following non-linear rate equaUon for T,