Structure - activity relationship of cobalt spinels for N2O catalytic decomposition

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F20%3A10245682" target="_blank" >RIV/61989100:27710/20:10245682 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Structure - activity relationship of cobalt spinels for N2O catalytic decomposition

Popis výsledku v původním jazyce

Results were presented during ICFUTURE 2020 (International Conference on Imaging and Characterization-Future Technologies and Applications, 8.-10..1.2020,Lasaretti, Oulu, Finland). Cobalt mixed oxides with spinel structure belong to active catalyst for N2O decomposition. Reaction is described as electron transfer from catalyst surface to N2O leading to its immediate dissociation and leaving oxygen atoms adsorbed on the surface. Catalytic cycle is closed by molecule oxygen desorption via Langmuir-Hinshelwood or Eley-Rideal mechanism. All reaction steps exhibit redox character; it means that reaction rate can be controlled by electronic properties. The series of Co3O4 and Co4MnAlOx were obtained by calcination of precursors prepared by different methods. Selected catalysts were deposited on SiC open-cell foam by wet impregnation and suspension methods. The catalysts were characterized by AAS, XRD, TPR-H2, FTIR, Raman, XPS, SEM, TEM and low-temperature nitrogen adsorption and tested for nitrous oxide decomposition. The correlation between methods of preparation, phase composition of precursors, redox and catalytic properties of the related cobalt spinel catalysts, and the role of the cobalt ions as catalytic active sites is discussed.

Název v anglickém jazyce

Structure - activity relationship of cobalt spinels for N2O catalytic decomposition

Popis výsledku anglicky

Results were presented during ICFUTURE 2020 (International Conference on Imaging and Characterization-Future Technologies and Applications, 8.-10..1.2020,Lasaretti, Oulu, Finland). Cobalt mixed oxides with spinel structure belong to active catalyst for N2O decomposition. Reaction is described as electron transfer from catalyst surface to N2O leading to its immediate dissociation and leaving oxygen atoms adsorbed on the surface. Catalytic cycle is closed by molecule oxygen desorption via Langmuir-Hinshelwood or Eley-Rideal mechanism. All reaction steps exhibit redox character; it means that reaction rate can be controlled by electronic properties. The series of Co3O4 and Co4MnAlOx were obtained by calcination of precursors prepared by different methods. Selected catalysts were deposited on SiC open-cell foam by wet impregnation and suspension methods. The catalysts were characterized by AAS, XRD, TPR-H2, FTIR, Raman, XPS, SEM, TEM and low-temperature nitrogen adsorption and tested for nitrous oxide decomposition. The correlation between methods of preparation, phase composition of precursors, redox and catalytic properties of the related cobalt spinel catalysts, and the role of the cobalt ions as catalytic active sites is discussed.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20700 - Environmental engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů