fig4

Figure 4. (A) Schematic illustration of the preparation process of PdW₁/Al₂O₃; (B) Adsorption energies of the adsorbates on the surface of PdO and Pd-O-W₁; (C) Charge density difference of the Pd-O-W₁ structure. Yellow and cyan colors represent the accumulation and loss of electron density, respectively; (D) Total density of states for Pd-O-W₁; (E) Charge density difference of the Pd-O-W₁ catalyst under the adsorption of H₂O and O₂^[23]. This figure is quoted with permission^[23]. Copyright 2022, John Wiley and Sons. DOS: Density of states.