Electrospinning synthesis and characterization of nanofibers of Co, Ce and mixed Co-Ce oxides. Their application to oxidation reactions of diesel soot and CO

Co, Ce and Co-Ce nanofibers were synthesized by the electrospinning method. To obtain mixed fibers, Co was incorporated in two ways: one step synthesis sequential synthesis. Nanofibers applied to reactions: gas-solid (CO oxidation) solid-solid-gas (combustion of diesel soot). Different activity trends observed both reactions. For soot combustion, more active either than or nanofibers. CO oxidation instead, order > Ce. Moreover, case for all samples temperature maximum combustion rate occurred at a relatively narrow range (350−390 °C). On contrary, T50 notably wider (150−325 The high shown is related multiple contact points between fibers particles, trend higher redox capacity as from CO-TPR experiments.