“…9b), the normalized CO production rate has the same trend as the second order reaction model (F2) at first, and subsequently, when 0.5> α > 0.2, the reaction mechanism model begins to transform to the D1 model, and then when α > 0.5, the CO 2 splitting reaction is more inclined to the two-dimensional diffusion model (D2), showing that the oxidation reaction may occur in crystal lattices, in which molecular motion depends on lattice defects. 64,65 Compared to undoped SrMnO 3 , the kinetic reaction mechanism of SCMA20 has mainly changed from F1 to F2, indicating that the kinetic reaction rate can be enhanced by the increase of the reaction order n . Therefore, the ultrahigh CO yield and fast kinetics of SCMA20 can be mainly attributed to the transition from the first-order reaction (F1) to the second-order reaction (F2).…”