On the mutual interactions between noble metal crystallites and zeolitic supports and their impacts on catalysis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62243136%3A_____%2F07%3A%230000213" target="_blank" >RIV/62243136:_____/07:#0000213 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S1381116906012209" target="_blank" >http://www.sciencedirect.com/science/article/pii/S1381116906012209</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.molcata.2006.09.017" target="_blank" >10.1016/j.molcata.2006.09.017</a>

Jazyk výsledku

angličtina

Název v původním jazyce

On the mutual interactions between noble metal crystallites and zeolitic supports and their impacts on catalysis

Popis výsledku v původním jazyce

The mutual metal?support interactions were studied in mordenite zeolite modified with 0.5, 2 and 5 wt.% platinum by impregnation or ion-exchange method. Each modification method led to different catalysts from the point of view of acidity. These interactions were thoroughly investigated by XPS, CO and pyridine FTIR spectroscopy, NH3-TPD and a model reaction (isomerization of n-butane). By XPS measurements and CO adsorption, it was observed that the Pt binding energy and the CO adsorption band increasedwith the acidity of the support. Simultaneously, a rearrangement on the strength of acid sites was recorded by pyridine-FTIR when the zeolites were modified by a metal function. Ultimately, such changes in acidity were translated into different catalyticperformances, mostly by suppressing or favoring cracking reactions. The interatomic model was examined and extrapolated to cover the effects that the metal particles have upon the support acidity.

Název v anglickém jazyce

On the mutual interactions between noble metal crystallites and zeolitic supports and their impacts on catalysis

Popis výsledku anglicky

The mutual metal?support interactions were studied in mordenite zeolite modified with 0.5, 2 and 5 wt.% platinum by impregnation or ion-exchange method. Each modification method led to different catalysts from the point of view of acidity. These interactions were thoroughly investigated by XPS, CO and pyridine FTIR spectroscopy, NH3-TPD and a model reaction (isomerization of n-butane). By XPS measurements and CO adsorption, it was observed that the Pt binding energy and the CO adsorption band increasedwith the acidity of the support. Simultaneously, a rearrangement on the strength of acid sites was recorded by pyridine-FTIR when the zeolites were modified by a metal function. Ultimately, such changes in acidity were translated into different catalyticperformances, mostly by suppressing or favoring cracking reactions. The interatomic model was examined and extrapolated to cover the effects that the metal particles have upon the support acidity.

Druh

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

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

—

Projekt

<a href="/cs/project/FT-TA4%2F066" target="_blank" >FT-TA4/066: *Výzkum vlivu motorových paliv obsahujících biosložky na chod a emise vznětových a zážehových motorů ve vozovém parku ČR.</a><br>

Návaznosti

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

Rok uplatnění

2007

Kód důvěrnosti údajů

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

Název periodika

Journal of Molecular Catalysis A: Chemical

ISSN

1381-1169

e-ISSN

—

Svazek periodika

264

Číslo periodika v rámci svazku

1-2

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

192-201

Kód UT WoS článku

—

EID výsledku v databázi Scopus

—