fig12
![Direct Z-scheme photocatalytic systems based on vdW heterostructures for water splitting and CO<sub>2</sub> reduction: fundamentals and recent advances](https://image.oaes.cc/ba04a360-c1e8-4c19-8989-bf9420411ccd/microstructures3076.fig.12.jpg)
Figure 12. (A) CO2RR and (B) OER photocatalytic pathways within C2N/aza-CMP heterostructure. Red balls stand for O atoms, while the white balls indicate H atoms. (Reproduced with permission[66]. Copyright 2020, Elsevier); (C) The diagrams regarding free energy for the 8e- pathways of CO2RR within C2N/aza-CMP heterostructure at diverse voltages. (Reproduced with permission[66]. Copyright 2020, Elsevier); (D) The diagrams regarding free energy for the 4e- pathways of OER within C2N/aza-CMP heterostructure at diverse voltages. The photogenerated holes and electrons provide the potentials of Uh = 2.24 V and Ue = 0.53 V, separately. (Reproduced with permission[66]. Copyright 2020, Elsevier).