CeO2-based catalysts with engineered morphologies for soot oxidation to enhance the soot-catalyst contact

Most DPFs perform a catalytically assisted regeneration. Since soot particles and the catalyst grain sizes often have different orders of magnitude, this leads to a poor accessibility of the soot particles to the catalyst inner porosities. This aspect could be ratelimiting especially at low temperatures. In this work, in order to improve the soot-catalyst interaction, the morphology of the catalyst was designed in the attempt to maximize the number of contact points: CeO2 in the form of nanofibers and self-assembled stars were synthesized to this end .