Seemingly monophasic Zn-doped ceria nanocrystals contain substantial amounts of X-ray amorphous ZnO not detectable by standard XRD. This ZnO can be incorporated upon annealing at temperatures up to 1300 °C.

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An excellent correlation between the structural properties and OSCs of dual-phase Zn-modified ceria nanocrystals is established. The detrimental effect of the secondary X-ray amorphous ZnO phase on soot oxidation is elucidated.

Sustained production of methane directly from water and carbon dioxide by solar-driven thermochemical cycles is achieved for the first time with rhodium on ceria.

No abstract