Role of electronic factor in soot oxidation process over tunnelled and layered potassium iron oxide catalysts

doi:10.1007/s11244-013-0003-8

Role of electronic factor in soot oxidation process over tunnelled and layered potassium iron oxide catalysts

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Role of electronic factor in soot oxidation process over tunnelled and layered potassium iron oxide catalysts

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punktacja MEiN [2013 A]: 30

title:	Role of electronic factor in soot oxidation process over tunnelled and layered potassium iron oxide catalysts
author:	Legutko Piotr , Stelmachowski Paweł , Sojka Zbigniew , Kotarba Andrzej , Trębala Michał
journal title:	Topics in Catalysis
volume:	56
issue:	1-8
date of publication :	2013
pages:	489-492
ISSN:	1022-5528
eISSN:	1572-9028
DOI:	10.1007/s11244-013-0003-8
URL:	https://link.springer.com/content/pdf/10.1007%2Fs11244-013-0003-8.pdf
date accessed:	2018-07-12
language:	English
journal language:	English
abstract in English:	This paper describes the investigations of the catalytic activity in soot oxidation over well-defined iron oxide based materials. The nanostructuration of iron oxide by potassium into tunnelled (KFeO 2 ) and layered (K 2 Fe 22 O 34 ) ferrites and the surface promotion with CeO 2 results in the marked increase in the catalytic activity (decrease of the ignition temperature down to 210 ° C and T 10 % to 310 ° C). The measurements of the catalysts work function showed that both nanostructuration and surface promotion with ceria of the best KFeO 2 phase led to increase of the electron availability (decrease of the work function). Strong correlation of the catalytic activity in soot combustion of the Ce–K–Fe–O systems with the work function value was revealed for the first time in the model studies, and can be used as a guideline for optimisation of the real catalytic filters.
keywords in English:	iron oxide, diesel, potassium, oxidation, cerium oxide, promotion, soot, ferrite, work function
affiliation:	Wydział Chemii : Zakład Chemii Nieorganicznej
type:	journal article
subtype:	academic paper