γ-Al₂O₃ supported Pd@CeO₂ core@shell nanospheres: salting-out assisted growth and self-assembly, and their catalytic performance in CO oxidation.

ABSTRACT: In this paper, we have successfully demonstrated the clean synthesis of high-quality Pd@CeO₂ core@shell nanospheres with tunable Pd core sizes in water, and furthermore loaded the as-obtained Pd@CeO₂ products on commercial γ-Al₂O₃via electrostatic interaction. KBr here plays two key roles in inducing the growth and self-assembly of Pd@CeO₂ core@shell nanospheres. First, Br^- ions can retard the reduction of Pd²⁺ ions via the formation of the more stable complex of [PdBr₄]^2- so as to tune the size of Pd cores. Second, it greatly decreases the colloidal stability, and hence the surface polarity-weakened Pd and CeO₂ NPs have to spontaneously self-assemble into more stable

SUBMITTER: Wang X 

PROVIDER: S-EPMC5729413 | biostudies-literature | 2015 May

REPOSITORIES: biostudies-literature