Table 8 Adsorption energies (\({E}_{{\rm{ads}}}\)) of CO2 and CH4, charge transfers (Q) upon CO2 adsorption, and maximum Gibbs free energy spans (\({G}_{\max }\)) of CO2 reduction to CH4 on the Nb2NO2 MXene surface doped with one atom of V, Cr, Mn, Fe, Co or Ni, according to the results of the calculations taken from ref.202

From: First-principles and machine-learning approaches for interpreting and predicting the properties of MXenes

Surface

\({E}_{{\rm{ads}}}\)(CO2)/eV

\(Q\)/e

\({G}_{\max }\)/eV

\({E}_{{\rm{ads}}}\)(CH4)/eV

Nb2NO2-V

−0.77

−0.60

1.00

−0.35

Nb2NO2-Cr

−0.51

−0.53

0.90

−0.47

Nb2NO2-Mn

−0.34

−0.58

0.95

−0.23

Nb2NO2-Fe

−0.46

−0.25

1.15

−0.41

Nb2NO2-Co

−0.30

−0.26

0.60

−0.38

Nb2NO2-Ni

−0.54

−0.31

0.80

−0.36