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Three model ceria catalysts, which are monocrystalline CeO2 nanocubes, polycrystalline CeO2 nanoparticles, and polycrystalline CeO2 spindles, were synthesized and analyzed with isothermal soot oxidation, H2-TPR, and Raman spectroscopy. The results suggest that the initial activity of the catalyst is determined by the number of catalyst–soot contact points rather than the catalyst surface area, while...
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