fig11
![Energy-efficient anodic reactions for sustainable hydrogen production via water electrolysis](https://image.oaes.cc/28d3d9ed-cc45-4385-be56-bc8a423770a6/cs3028.fig.11.jpg)
Figure 11. Schematic diagram of calculated state density of (A) fcc-Ni; (B) hcp-Ni-N; and (C) hcp-CoNi-N; Charge density difference analysis model of (D) hcp-Ni-N; and (E) hcp-CoNi-N, where yellow represents electron gain and cyan represents electron loss[124].