By calculating the electrochemical limiting potentials (UL) and activation energies (Ga,i) of N-N coupling processes, they concluded that Pt is the most active metal followed by Ir, which is in agreement with the previous experiments . Recently, Elnabawy et al. performed a similar analysis on more open (100) facet of 8 FCC transition metals to understand the effect of facets on AOR . The activation energy of N-N bond formation through the coupling of two NH2* (NH2* + NH2* → N2H4*) on Pt (111) was 1.07 eV, which is lowest among the GM and NN mechanisms. On Pt (100), however, the lowest activation energy of N-N bond formation (N* + N* → N2*) was 0.53 eV via NN mechanism, indicating higher AOR activity on Pt (100) compared to Pt (111). It was highlighted that higher catalytic activity of Pt (100) was originated from weaker N* adsorption energy than Pt (111), which destabilizes reactants, thus facilitates the dimerization of two N*. We note that only N-N coupling processes via two adsorbates have been considered in AOR in literature and microkinetic modeling that quantitatively predicts results of complex electrochemical AOR has not been reported to date.