fig7
![High hydrogen evolution activities of dual-metal atoms incorporated N-doped graphenes achieved by coordination regulation](https://image.oaes.cc/647b99ba-c13d-4529-9b84-58a369a9f683/jmi3034.fig.7.jpg)
Figure 7. (A) Linear relationship between ICOHP and free energy of H adsorption for MN4-gra/MMN6-gra/M1M2N6-gra; (B) Linear relationship between the d-band centers of the metals and free energy of H adsorption. ICOHP: M-H crystal orbital Hamiltonian population integral.