Table of Contents
Inorganics, Volume 8, Issue 5 (May 2020) – 8 articles
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Cover Story (view full-size image) CeO2-ZrO2 solid solutions are key ingredients in catalyst formulations due to the ability of ceria [...] Read more. CeO2-ZrO2 solid solutions are key ingredients in catalyst formulations due to the ability of ceria to easily cycle its oxidation state. Here, carbon soot was used as a solid reductant to better understand the oxygen transfer ability of ceria-zirconia at low temperatures in the presence of oxygen and NO/NO2. The existence of a ceria-zirconia core and carbon shell architecture strongly enhanced reactivity of interfacial oxygen species while negatively affecting NO oxidation characteristics. The study confirmed the key role of active oxygen species in soot oxidation with ceria-based materials, and more importantly it disclosed the subtle but distinct redox chemistry of ceria with O2 and NO/NO2 mixtures at varying degrees of interaction with carbon. View this paper.