Cryo-TEM and electron tomography reveal leaching-induced pore formation in ZSM-5 zeolite
Bomans, Paul H.H.
Sommerdijk, Nico A.J.M.
Patterson, Joseph P.
van Bokhoven, Jeroen A.
- Journal Article
Rights / licenseCreative Commons Attribution 3.0 Unported
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. Show more
Journal / seriesJournal of Materials Chemistry A
Pages / Article No.
PublisherRoyal Society of Chemistry
Organisational unit03746 - Van Bokhoven, Jeroen A. / Van Bokhoven, Jeroen A.
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