Research on the synergistic doped effects and the catalysis properties of Cu2+ and Zn2+ co-doped CeO2 solid solutions

The corresponding HRTEM image as is shown in the figure reveals the well defined fringes with interplanar spacing of 0.31 nm corresponding to the (111) planes of CeO2. The SEAD pattern presents several concentric diffraction circles, which suggests the existence of polycrystalline species. These diffraction rings can be indexed to the (111), (200), (220), (311), (400), (422) and (311) of CeO2 nanoparicles.196