fig13

Figure 13. (A) (a) Working principle of CMT@MXene bifunctional electrocatalyst with an electron hopping mechanism; (b) SEM image of CMT@MXene; (c) Charge-discharge profiles of samples^[206]. Copyright 2023, Wiley-VCH. (B) (a) Molecular structures of Ni-TAPP-Co; (b) Top view of Ni-TAPP-Co; (c) SEM image of Ni-TAPP-Co; (d) Galvanostatic profiles for samples^[207]. Copyright 2023, the American Association for the Advancement of Science.