where Epolymer, EB-monomer and EN-monomer are the total energy of 2D binary polymers, the B-and N-centered HTs monomers, respectively, and E H 2 is the energy of the released hydrogen molecule. As presented in Table , the formation energies of 2D CTPAB, OTPAB, MTPAB are found to be 1.56, 1.59 and 1.38 eV, respectively. For all three cases, these values are also more stable compared to the unary counterparts (e.g.