Thermal Transformation of Birnessite (OL) Towards Highly Active Cryptomelane (OMS-2) Catalyst for Soot Oxidation

A layered potassium–manganese oxide, birnessite (OL: KMn 4 O 8 ) was subjected to long-term post-calcination thermal treatment aimed at stimulating its activity in catalytic soot oxidation. The 12 h thermal treatment at several temperatures (425, 500, 550 and 650 °C) in atmospheric conditions result...

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Veröffentlicht in:	Catalysis letters 2019-08, Vol.149 (8), p.2218-2225
Hauptverfasser:	Jakubek, T., Hudy, C., Gryboś, J., Manyar, H., Kotarba, A.
Format:	Artikel
Sprache:	eng
Schlagworte:	Catalysis Catalysts Catalytic activity Catalytic converters Chemistry Chemistry and Materials Science Electron transfer Exhaust gases Heat treatment Industrial Chemistry/Chemical Engineering Manganese oxides Material properties Molecular sieves Organometallic Chemistry Oxidation Physical Chemistry Potassium Pretreatment Raman spectroscopy Roasting Soot Temperature Thermal transformations Transition metal oxides Transition metals Transmission electron microscopy Work functions X ray powder diffraction X-ray diffraction
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