Determining the location and nearest neighbours of aluminium in zeolites with atom probe tomography

Perea, Daniel E.; Arslan, Ilke; Liu, Jia; Ristanović, Zoran; Kovarik, Libor; Arey, Bruce W.; Lercher, Johannes A.; Bare, Simon R.; Weckhuysen, Bert M.

doi:10.1038/ncomms8589

Title: Determining the location and nearest neighbours of aluminium in zeolites with atom probe tomography

Journal Article · Thu Jul 02 00:00:00 EDT 2015 · Nature Communications

DOI:https://doi.org/10.1038/ncomms8589· OSTI ID:1260735

Perea, Daniel E. ^[1]; Arslan, Ilke ^[2]; Liu, Jia ^[1]; Ristanović, Zoran ^[3]; Kovarik, Libor ^[1]; Arey, Bruce W. ^[1]; Lercher, Johannes A. ^[4]; Bare, Simon R. ^[5]; Weckhuysen, Bert M. ^[3]

Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Inst. for Integrated Catalysis
Univ. of Utrecht (Netherlands)
Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Inst. for Integrated Catalysis; Technische Univ. of Munich, Garching (Germany)
UOP LLC, Des Plaines, IL (United States)

Zeolite catalysis is determined by a combination of pore architecture and Brønsted acidity. As Brønsted acid sites are formed by the substitution of AlO4 for SiO4 tetrahedra, it is of utmost importance to have information on the number as well as the location and neighbouring sites of framework aluminium. Unfortunately, such detailed information has not yet been obtained, mainly due to the lack of suitable characterization methods. Here we report, using the powerful atomic-scale analysis technique known as atom probe tomography, the quantitative spatial distribution of individual aluminium atoms, including their three-dimensional extent of segregation. Ultimately, using a nearest-neighbour statistical analysis, we precisely determine the short-range distribution of aluminium over the different T-sites and determine the most probable Al–Al neighbouring distance within parent and steamed ZSM-5 crystals, as well as assess the long-range redistribution of aluminium upon zeolite steaming.

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Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Biological and Environmental Research (BER)

Grant/Contract Number:: AC05-76RL01830

OSTI ID:: 1260735

Journal Information:: Nature Communications, Vol. 6; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 118 works

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