Figure 3.

(a) Short-range neutron diffraction data for the transition-metal-substituted CeO₂ samples. The peaks corresponding to the O–H, M–O, Ce–O, and O–O correlations are noted for comparison. Insets showing the structure model of the fluorite structure of CeO₂ and illustrative model of the surface-substituted CeO₂ nanocrystals are provided at the top and bottom, respectively. Short-range PDF analysis of CuCoFeNiMn-CeO₂ (b) excluding and (c) including the Ce₇O₁₂ phase. The contribution from the rock salt HEO domains, which is less than 5 Å as shown in Figure S21, is highlighted using an asterisk.