All

What are you looking for?

All
Projects
Results
Organizations

Quick search

  • Projects supported by TA ČR
  • Excellent projects
  • Projects with the highest public support
  • Current projects

Smart search

  • That is how I find a specific +word
  • That is how I leave the -word out of the results
  • “That is how I can find the whole phrase”

The Bronsted acidity of three- and two-dimensional zeolites

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F19%3A00517552" target="_blank" >RIV/61388955:_____/19:00517552 - isvavai.cz</a>

  • Alternative codes found

    RIV/00216208:11310/19:10403394 RIV/00216275:25310/19:39914316

  • Result on the web

    <a href="http://hdl.handle.net/11104/0302886" target="_blank" >http://hdl.handle.net/11104/0302886</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1016/j.micromeso.2019.03.033" target="_blank" >10.1016/j.micromeso.2019.03.033</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    The Bronsted acidity of three- and two-dimensional zeolites

  • Original language description

    The zeolite activity in processes driven by Bronsted acid sites is determined by the distribution of the protons in the zeolite and strength of their interaction with the framework. This study aims to assess how much the transformation from three-dimensional (3D) bulk zeolite to its corresponding two-dimensional (2D) layered form changes the proton distribution and strength of the proton-framework interaction and thus how much it affects the zeolite Bronsted acid strength. Zeolites with three distinct topologies, MWW, PCR, and MFI, which form also layered analogues with considerably different thickness and silanol density were considered. To probe the Bronsted acidity of both 3D and 2D forms, an array of typical acidity descriptors (i.e., O-H stretching frequency, shift of O-H frequencies upon adsorption of CO probe molecule, C-O stretching frequencies and adsorption enthalpies of the CO adsorption complex) have been evaluated, employing both dispersion-corrected density functional theory and Fourier-transform infrared spectroscopy. Using these descriptors, the Bronsted acidity of 2D form is, on average, the same or just slightly lower than that of the 3D form. Transformation to layered form does affect the proton distribution and values of acidity descriptors for individual T sites, however, if all T sites are considered, the aggregate effect is almost negligible. Hence, these results suggest that a larger effect of the 3D > 2D transformation can be expected for frameworks with fewer distinct T sites.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10403 - Physical chemistry

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2019

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Microporous and Mesoporous Materials

  • ISSN

    1387-1811

  • e-ISSN

  • Volume of the periodical

    282

  • Issue of the periodical within the volume

    JUL 2019

  • Country of publishing house

    NL - THE KINGDOM OF THE NETHERLANDS

  • Number of pages

    12

  • Pages from-to

    121-132

  • UT code for WoS article

    000471206400016

  • EID of the result in the Scopus database

    2-s2.0-85063320728