We have demonstrated a method for embedding platinum (Pt) nanoparticles in the inner surfaces of ceria (CeO2) hollow fibers with open ends to generate a new catalytic system that could resist thermal sintering up to 700 oC. CeO2 hollow fibers with Pt nanoparticles embedded in their inner surfaces (Ptencap/CeO2) were prepared by sequentially depositing Pt nanoparticles and CeO2 sheaths on electrospun fibers of polystyrene, followed by calcination in air at 400 oC. Despite a relatively low Pt loading in this new system, the turnover frequency (TOF) of the as-synthesized Ptencap/CeO2 hollow fibers for CO oxidation was 2�3 orders of magnitude higher than those based on the conventional Pt/SiO2 catalytic system. It could be attributed to a unique structure and composition for maximizing the Ptencap/CeO2 interface.

Highly reactive and sinter-resistant catalytic system based on Pt nanoparticles embedded in the inner surfaces of CeO<sub>2</sub> hollow fibers

246th National Meeting (2013)

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Highly reactive and sinter-resistant catalytic system based on Pt nanoparticles embedded in the inner surfaces of CeO2 hollow fibers

Highly reactive and sinter-resistant catalytic system based on Pt nanoparticles embedded in the inner surfaces of CeO₂ hollow fibers