Abstract
The effect of surface and bulk alkali (Na, K) promotions on the cobalt-oxide catalyst activity in soot oxidation was investigated. While surface promotion does not alter the cobalt spinel structure, the introduction of alkali into the bulk leads to the formation of layered cobaltates (revealed by XRD, Raman spectroscopy and XPS). The catalytic activity was determined using the temperature programmed oxidation of model soot (Printex 80), both in tight and loose contact conditions. The alkali bulk promotion is much more effective than surface promotion in soot oxidation, lowering the soot ignition temperature by 340°C for the most active catalyst K0.25CoO2.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
