4,4-Biphenyldinitrile covalent triazine framework CFT-2 loaded bimetallic oxides as effective electrocatalysts

Abstract

Covalent triazine frameworks (C0054Fs) are promising electrode materials due to their rigid bonds, high surface area, and porosity, addressing the challenges of poor stability and slow electron diffusion in traditional materials, therefore, this experiment proposes that CTF-2 prepared by 4,4-biphenyl dicarbonitrile is used for rechargeable zinc-air battery electrocatalytic materials. Notably, the electrochemical properties were improved by incorporating bimetallic oxides into the CTF-2 precursor, where each triazine ring and bimetallic oxide provided empty orbitals that could deliver electrons, which enhanced the electron transfer between the triazine ring and the metal ions, with the number of electrons transferred found to be close to 4 electrons by testing, and the half-wave potential of ORR in the electrolyte for the catalysts prepared in the present experiments (CoFe₂O₄@CN/CTF-2) is The half-wave potential of ORR in the electrolyte was 0.84 V similar to that of Pt/C, whereas the overpotential of OER was 330 mV, superior to that of Pt/C by 10 mA at a current density of 10 mA cm⁻², thus demonstrating that the bifunctional electrocatalytic activity of the ORR/OER of CoFe₂O₄@CN/CTF-2 was obviously enhanced.