Interaction of CO probe molecules with Cu(+) in MCM-22 zeolite

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F14%3A39898160" target="_blank" >RIV/00216275:25310/14:39898160 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.micromeso.2013.11.031" target="_blank" >http://dx.doi.org/10.1016/j.micromeso.2013.11.031</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.micromeso.2013.11.031" target="_blank" >10.1016/j.micromeso.2013.11.031</a>

Result language
angličtina
Original language name
Interaction of CO probe molecules with Cu(+) in MCM-22 zeolite
Original language description
The interaction of CO probe with copper exchanged MCM-22 zeolite is studied. Particularly, the heterogeneity of Cu(+) ions is examined. For this purpose, combined CO adsorption microcalorimetry with FTIR of CO adsorption/desorption at RT and elevated temperature is originally exploited. Contribution brings the first experimental evidence for three families of Cu(+) ions differing in the interaction energy with CO and exhibiting Q(diff) around 107, 100 - 97 and {= 92 kJ mol(-1), respectively. The energydistribution determined from calorimetry and desorption curves is due to copper coordination differences. Despite wide energetic distribution of carbonyls, only two bands in IR spectra at 2159 and 2150 cm(-1) are observed. Similarly to other zeolites, Cu(+) loses its original coordination to framework during the CO adsorption. The preferred trigonal planar geometry with CO and two zeolite oxygen gives rise to the band at 2159 cm(-1). Peculiarly for MCM-22, significant amount of Cu(+) ion
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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