Siting and Distribution of the Co Ions in Beta Zeolite: A UV-Vis-NIR and FTIR Study.

Result code in IS VaVaI

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Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Siting and Distribution of the Co Ions in Beta Zeolite: A UV-Vis-NIR and FTIR Study.

Original language description

The Co(II) ion sites in dehydrated Beta zeolites, consisting of polymorphs A, B and C, were identified using an approach based on a similarity between Vis spectra of the Co(II) ions in mordenite, ferrierite ZSM-5 and beta zeolites, and similarity in local framework structures accommodating the Co(II) ions in these zeolites. The results were supported by FTIR spectra in the region of skeletal vibrations showing the characteristic shifts of framework T-O-T vibrations induced by the framework perturbationsdue to the Co(II) ions at cationic sites. Three different cationic sites accommodating divalent metal ions in Beta zeolite were found. Their positions in the channel system and local framework arrangements in different polymorphs of Beta zeolites were suggested. The .alfa. site is formed in polymorph C of the Beta structure by an elongated six-member ring composed of two folded connected five-member rings. The Co(II) ions at the .alfa. site exhibit an absorption band.

Czech name

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Czech description

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Type

J_x - 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)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2002

Confidentiality

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

Name of the periodical

Journal of Catalysis

ISSN

0021-9517

e-ISSN

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Volume of the periodical

211

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

10

Pages from-to

198-207

UT code for WoS article

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EID of the result in the Scopus database

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