Abstract
The investigation of N2H4 decomposition catalysts is a highly popular subject because of the demand for clean and renewable energy sources. Herein, 𝑁2𝐻4 adsorption energy and decomposition kinetics are analyzed to find a better 2D single-atom catalyst (SAC) using modified graphene by embedding light 3dtransition metals. Hydrogen selection of hydrazine decomposition over Sc,Ti and V atoms catalysts are studied on two pathways: the N-N bond scission ( 𝑁2𝐻4 → 𝑁𝐻2 + 𝑁𝐻2 ) and N-H bond split (𝑁2𝐻4 → 𝑁2𝐻3 + 𝐻). On graphene embedded by Sc and Ti metal produces easily 2𝑁𝐻2 because their activation energy is almost close to 0 eV. The activation of energy of N-H cleavage on graphene embedded by vanadium atom is lower (0.99 eV) than that of N-N cleavage (1.36 eV). Therefore, H production from hydrazine on V metal surface is more favorable than 2𝑁𝐻2 production.