Enhanced Catalytic Soot Oxidation by Ce-Based MOF-Derived Ceria Nano-Bar with Promoted Oxygen Vacancy

As CeO2 is a useful catalyst for soot elimination, it important to develop with higher contact areas, and reactivities efficient oxidation catalytic are basically controlled by structures surface properties of catalysts. Herein, Ce-Metal organic framework (MOFs) consisting Ce benzene-1,3,5-tricarboxylic acid (H3BTC) employed as the precursor CeBTC exhibits unique bar-like high-aspect-ratio morphology, which then transformed into nanoscale configuration. More importantly, this nanobar (CeONB) possesses porou, even hollow structures, well more oxygen vacancies, enabling CeONB become promising oxidation. Thus, shows much activity than commercial nanoparticle (comCeO) significantly lower ignition temperature (Tig). Moreover, while comCeO leads production CO together CO2, can completely convert CO2. The tight mode also enables exhibit very low Tig 310 °C, whereas existence NO enhances reduce Tig. mechanism NO-assisted examined, validated DRIFTS identify formation transformation nitrogen-containing intermediates. recyclable over many consecutive cycles maintained its high These results demonstrate that easily prepared Ce-based