Bronsted acidity of H-MCM-22 as probed by variable-temperature infrared spectroscopy of adsorbed CO and N-2

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F14%3A00427871" target="_blank" >RIV/61388955:_____/14:00427871 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216275:25310/14:39898156

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.cattod.2013.09.013" target="_blank" >http://dx.doi.org/10.1016/j.cattod.2013.09.013</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cattod.2013.09.013" target="_blank" >10.1016/j.cattod.2013.09.013</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Bronsted acidity of H-MCM-22 as probed by variable-temperature infrared spectroscopy of adsorbed CO and N-2

Popis výsledku v původním jazyce

Bronsted acidity is a key factor controlling catalytic performance of zeolites in many technological processes, and hence the need to find a reliable means for measuring acidity strength. The enthalpy change, Delta H-0, involved in the hydrogen bonding interaction between a weak base, such as carbon monoxide or dinitrogen, and the Bronsted acid [Si(OH)Al] hydroxyl groups should correlate with the zeolite acid strength. However, on account of simplicity, the red shift of the O-H stretching frequency, Delta nu(OH), in the hydrogen-bonded OH center dot center dot center dot CO or OH center dot center dot center dot N-2 complexes is frequently measured (instead of Delta H-0) and correlated with acid strength; and in fact it is often found that Delta H-0 and Delta nu(OH), correlate among themselves, but this might not always be the case. We report herein on a variable-temperature IR (VTIR) spectroscopic study of the interaction of CO and N-2 with the protonic zeolite H-MCM-22 (structure typ

Název v anglickém jazyce

Bronsted acidity of H-MCM-22 as probed by variable-temperature infrared spectroscopy of adsorbed CO and N-2

Popis výsledku anglicky

Bronsted acidity is a key factor controlling catalytic performance of zeolites in many technological processes, and hence the need to find a reliable means for measuring acidity strength. The enthalpy change, Delta H-0, involved in the hydrogen bonding interaction between a weak base, such as carbon monoxide or dinitrogen, and the Bronsted acid [Si(OH)Al] hydroxyl groups should correlate with the zeolite acid strength. However, on account of simplicity, the red shift of the O-H stretching frequency, Delta nu(OH), in the hydrogen-bonded OH center dot center dot center dot CO or OH center dot center dot center dot N-2 complexes is frequently measured (instead of Delta H-0) and correlated with acid strength; and in fact it is often found that Delta H-0 and Delta nu(OH), correlate among themselves, but this might not always be the case. We report herein on a variable-temperature IR (VTIR) spectroscopic study of the interaction of CO and N-2 with the protonic zeolite H-MCM-22 (structure typ

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/GBP106%2F12%2FG015" target="_blank" >GBP106/12/G015: Vývoj nových nanoporézních adsorbentů a katalyzátorů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Catalysis Today

ISSN

0920-5861

e-ISSN

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Svazek periodika

227

Číslo periodika v rámci svazku

MAY 2014

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

5

Strana od-do

45-49

Kód UT WoS článku

000332412900008

EID výsledku v databázi Scopus

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