fig8
![Recent advances in 2D structured materials with defect-exploiting design strategies for electrocatalysis of nitrate to ammonia](https://image.oaes.cc/096a98db-afdc-4401-97e5-aad0c5e86713/em4067.fig.8.jpg)
Figure 8. (A) A schematic representation of MAX structures from n = 1 to n = 4 and their etched MXene structures. Reprinted with permission from Ref.[103]. Copyright 2021 Wiley-VCH)[103]. (B) A schematic of different surface functional groups depending on the etching route. Reprinted with permission from Ref.[104]. Copyright 2018 Wiley-VCH[104]. (C) Schematic depicting different MXene stoichiometries. Reprinted with permission from Ref.[105]. Copyright 2023 Wiley-VCH[105].