Materials with Pt@CeO2-δ core–shell nanoparticles on 3D-ordered macroporous (3DOM) CeO2 are prepared by in situ colloidal crystal templating. 3DOM Ptn@CeO2-δ/CeO2 catalysts, which have both good contact between the solid reactant and the catalyst and a high density of coordinatively unsaturated ceric sites, show high catalytic activities and stabilities for soot oxidation.
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Wei et al. (2013) studied this question.
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