It is interesting to note that the sum of all TOFs of T-path was negligible compared to Epath (Figure ). In addition, TOF of T-path reached a plateau at potential close to UL of Pt (111), while that of E-path increased until the potential increases up to 1.0 VRHE. This could be attributed to potential-dependent deprotonation barriers, where increasing potential keeps decreasing those barriers, thus increasing the TOFs. These results suggest that E-path contributes more significantly to AOR compared to T-path and highlight that the electrochemical N-N bond formation steps should be included in the microkinetic modeling. Notably, we observed that the total TOF are highly correlated with the minimum value of UL among all E-path, suggesting that this can be used as a descriptor for predicting the overall AOR activity (Figure ). Since there is an uncertainty on electrochemical coupling barriers, we also tested 0.6 eV of Ga,i for N-N bond formation steps , but similar trends were observed (Figure ). Although this is beyond the scope of this work, these electrochemical bond formation barriers should be calculated in the future considering explicit water molecules and a constant potential scheme . Since various reaction pathways are involved in AOR, developing simple descriptors would be beneficial for efficiently predicting catalytic activities and providing a design strategy . To reduce a dimensionality of reaction networks of AOR, we expressed binding free energies of reaction intermediates in the following linear functions,