Cryo-TEM and electron tomography reveal leaching-induced pore formation in ZSM-5 zeolite

Teng Li, Hanglong Wu, Johannes Ihli, Zhiqiang Ma, Frank Krumeich, Paul H.H. Bomans, Nico A.J.M. Sommerdijk, Heiner Friedrich, Joseph P. Patterson (Corresponding author), Jeroen A. Van Bokhoven (Corresponding author)

Research output: Contribution to journalArticleAcademicpeer-review

6 Citations (Scopus)
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Abstract

Zeolites are the catalytic workhorses of the refinery and chemicals production industry. Their inherent micropores lead to remarkable shape-selectivity, but also present diffusion limitations on reactions. One scalable approach to further their functionality is to introduce mesopores into the individual zeolite crystal by base leaching. Using cryogenic transmission electron microscopy (cryo-TEM), we are able to capture the pore formation process in ZSM-5 zeolites in the solution state, first forming mesopores, to eventually yielding hollow crystals. Electron tomography indicates that the larger pores in the initial leaching stages tend to exist at the boundary between the aluminum-rich shell and the aluminum-poor core, while multiple small pores are also present within the aluminum-poor core. This indicates that pore formation is based on crystalline and chemical inhomogeneities at the single crystal level.

Original languageEnglish
Pages (from-to)1442-1446
Number of pages5
JournalJournal of Materials Chemistry A
Volume7
Issue number4
DOIs
Publication statusPublished - 28 Jan 2019

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  • Equipment

    Center for Multiscale Electron Microscopy (CMEM)

    Heiner Friedrich (Manager), Rick Joosten (Operator), Demi de Moor (Operator), Pauline Schmit (Operator), Ingeborg Schreur - Piet (Operator), Anne Spoelstra (Operator) & Nina Romme - van Moll (Other)

    Materials and Interface Chemistry

    Facility/equipment: Research lab

  • Cite this

    Li, T., Wu, H., Ihli, J., Ma, Z., Krumeich, F., Bomans, P. H. H., Sommerdijk, N. A. J. M., Friedrich, H., Patterson, J. P., & Van Bokhoven, J. A. (2019). Cryo-TEM and electron tomography reveal leaching-induced pore formation in ZSM-5 zeolite. Journal of Materials Chemistry A, 7(4), 1442-1446. https://doi.org/10.1039/c8ta10696g