Washcoated open-cell foam cobalt spinel catalysts for N2O decomposition

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F22%3A10250923" target="_blank" >RIV/61989100:27360/22:10250923 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27710/22:10250923 RIV/61989100:27640/22:10250923

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S246882312200640X?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S246882312200640X?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.mcat.2022.112754" target="_blank" >10.1016/j.mcat.2022.112754</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Washcoated open-cell foam cobalt spinel catalysts for N2O decomposition

Popis výsledku v původním jazyce

The Co3O4 modified with 1 wt.% Cs was deposited on alpha-Al2O3 open-cell foam covered with different washcoats (MgO, MnO2, SiO2, TiO2), investigated by XRD, Raman microspectroscopy, nitrogen physisorption, XPS, SEM and TPR-H2 in order to elucidate interactions between Cs-Co3O4 and the washcoat and their effect on surface area, reducibility, dispersion, and low temperature decomposition of N2O. The samples with SiO2 and TiO2 washcoats had the largest surface areas. Only SiO2 did not interact with the active phase and did not change the reducibility of the catalyst. Although the same Cs concentration was adjusted during preparation of all catalysts, differences in the Cs/Co surface molar ratio were observed due to a different level of Co3O4 particles aggregation and cesium dispersion. Catalytic activity correlated with the surface Cs/Co molar ratio closely interconnected with the surface Co3+/Co2+ molar ratio while there were no direct relationships to the redox properties and surface area. The highest activity was achieved for the MgO washcoat prepared from carbonate with the highest Co3+/Co2+ molar ratio corresponding to the optimal Cs/Co surface molar ratio around 0.1.

Název v anglickém jazyce

Washcoated open-cell foam cobalt spinel catalysts for N2O decomposition

Popis výsledku anglicky

The Co3O4 modified with 1 wt.% Cs was deposited on alpha-Al2O3 open-cell foam covered with different washcoats (MgO, MnO2, SiO2, TiO2), investigated by XRD, Raman microspectroscopy, nitrogen physisorption, XPS, SEM and TPR-H2 in order to elucidate interactions between Cs-Co3O4 and the washcoat and their effect on surface area, reducibility, dispersion, and low temperature decomposition of N2O. The samples with SiO2 and TiO2 washcoats had the largest surface areas. Only SiO2 did not interact with the active phase and did not change the reducibility of the catalyst. Although the same Cs concentration was adjusted during preparation of all catalysts, differences in the Cs/Co surface molar ratio were observed due to a different level of Co3O4 particles aggregation and cesium dispersion. Catalytic activity correlated with the surface Cs/Co molar ratio closely interconnected with the surface Co3+/Co2+ molar ratio while there were no direct relationships to the redox properties and surface area. The highest activity was achieved for the MgO washcoat prepared from carbonate with the highest Co3+/Co2+ molar ratio corresponding to the optimal Cs/Co surface molar ratio around 0.1.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20400 - Chemical engineering

Projekt

<a href="/cs/project/EF16_019%2F0000853" target="_blank" >EF16_019/0000853: Institut environmentálních technologií - excelentní výzkum</a><br>

Návaznosti

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

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Molecular Catalysis

ISSN

2468-8231

e-ISSN

—

Svazek periodika

533

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

nestrankovano

Kód UT WoS článku

000891629400002

EID výsledku v databázi Scopus

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