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Surface Potassium Promotion of Co4MnAlO x in Direct NO Decomposition Generates the Same Type of Active Sites as Bulk Promotion
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SYSNO ASEP 0574284 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Surface Potassium Promotion of Co4MnAlO x in Direct NO Decomposition Generates the Same Type of Active Sites as Bulk Promotion Tvůrce(i) Bílková, T. (CZ)
Pacultová, K. (CZ)
Karásková, K. (CZ)
Fridrichová, D. (CZ)
Jirátová, Květa (UCHP-M) RID, ORCID, SAI
Koštejn, Martin (UCHP-M) RID, SAI, ORCID
Slowik, G. (PL)
Ritz, M. (CZ)
Haneda, M. (JP)
Obalová, L. (CZ)Zdroj.dok. Industrial and Engineering Chemistry Research. - : American Chemical Society - ISSN 0888-5885
Roč. 62, č. 31 (2023), s. 12133-12151Poč.str. 19 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova Al mixed-oxide ; alkali-metal promoters ; N2O decomposition ; reaction-mechanism Obor OECD Chemical process engineering Způsob publikování Open access Institucionální podpora UCHP-M - RVO:67985858 UT WOS 001034659700001 EID SCOPUS 85167775788 DOI 10.1021/acs.iecr.3c01011 Anotace K/Co4MnAlO x mixedoxidesare active in direct NO decomposition. This work investigates theeffect of the preparation method and K precursor type. Using the incipientwetness impregnation method, the modification by the required amountof K was ensured. Regardless of the K precursor type, similar NO conversionswere reached for samples modified by 4 wt % K. The optimal amountof K from the KNO3 precursor was evaluated as 2-6wt %. The physicochemical properties were carefully explored usingatomic absorption spectroscopy, X-ray photoelectron spectroscopy,X-ray diffraction, Fourier transform IR spectroscopy, N-2 physisorption, H-2 temperature-programmed reduction, CO2 and NO temperature-programmed desorption, scanning electronmicroscopy, and transmission electron microscopy, correlated withcatalytic properties in transient and steady state and compared withthe results obtained in our previous study using bulk modified samples.The present study underlines the effect of the preparation methodon the Brunauer-Emmett-Teller surface area (S (BET)) of prepared catalysts and thus the amountof active sites available for catalytic reaction. Moreover, the resultsemphasize the importance of catalyst basicity, which affects the amountof adsorbed NO2 (-) species, the key intermediatesin the direct NO catalytic reaction. Pracoviště Ústav chemických procesů Kontakt Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Rok sběru 2024 Elektronická adresa https://pubs.acs.org/doi/epdf/10.1021/acs.iecr.3c01011
Počet záznamů: 1