One-pot hydrothermal synthesis of a novel Pt@CeO2 nanocomposite for water-gas shift reaction.

A Pt-doped ceria nanocomposite with controlled morphology was prepared by one-pot hydrothermal synthesis method. The crystalline structure, texture and metal dispersion of the novel Pt@CeO 2 sample were studied by powder XRD, TEM, XPS, H 2 -TPR, N 2 -adsorption and CO chemisorption. The catalyst preparation procedure under hydrothermal conditions had significant impact on the Pt nanoparticles growth rate. Highly dispersed Pt species can be sufficiently anchored on the surface of nanopolyhedral CeO 2. The nanopolyhedral Pt@CeO 2 catalyst exhibits excellent catalytic activity for the water-gas shift reaction, suggesting an intimate interaction between Pt nanoparticles and nanopolyhedral CeO 2 that promotes the generation of additional active sites. Unlabelled Image • The Pt@CeO 2 nanocomposite was prepared by one-pot hydrothermal synthesis method. • Pt species was highly dispersed on the nanopolyhedral CeO 2 with intimate interaction. • The nanopolyhedral Pt@CeO 2 catalyst possess more active sites for WGS reaction. [ABSTRACT FROM AUTHOR]