Finned zeolite catalysts

There is growing evidence for the advantages of synthesizing nanosized zeolites with markedly reduced internal diffusion limitations for enhanced performances in catalysis and adsorption. Producing zeolite crystals with sizes less than 100 nm, however, is non-trivial, often requires the use of compl...

Full description

Saved in:
Bibliographic Details
Published in:Nature materials Vol. 19; no. 10; pp. 1074 - 1080
Main Authors: Dai, Heng, Shen, Yufeng, Yang, Taimin, Lee, Choongsze, Fu, Donglong, Agarwal, Ankur, Le, Thuy Thanh, Tsapatsis, Michael, Palmer, Jeremy C., Weckhuysen, Bert M., Dauenhauer, Paul J., Zou, Xiaodong, Rimer, Jeffrey D.
Format: Journal Article
Language:English
Published: London Nature Publishing Group UK 01.10.2020
Nature Publishing Group
Springer Nature - Nature Publishing Group
Subjects:
119/118
140/131
140/146
639/301/299/1013
639/638/77/884
Aluminosilicates
Aluminum silicates
Biomaterials
Catalysis
Chemical synthesis
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Crystallography
Crystals
Epitaxial growth
Fins
Mass transport
Materials Science
Nanocrystals
Nanoparticles
Nanotechnology
Optical and Electronic Materials
Physics
Titration
Transport properties
Zeolites
ISSN:1476-1122, 1476-4660, 1476-4660
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:There is growing evidence for the advantages of synthesizing nanosized zeolites with markedly reduced internal diffusion limitations for enhanced performances in catalysis and adsorption. Producing zeolite crystals with sizes less than 100 nm, however, is non-trivial, often requires the use of complex organics and typically results in a small product yield. Here we present an alternative, facile approach to enhance the mass-transport properties of zeolites by the epitaxial growth of fin-like protrusions on seed crystals. We validate this generalizable methodology on two common zeolites and confirm that fins are in crystallographic registry with the underlying seeds, and that secondary growth does not impede access to the micropores. Molecular modelling and time-resolved titration experiments of finned zeolites probe internal diffusion and reveal substantial improvements in mass transport, consistent with catalytic tests of a model reaction, which show that these structures behave as pseudo-nanocrystals with sizes commensurate to that of the fin. This approach could be extended to the rational synthesis of other zeolite and aluminosilicate materials. Nanosized zeolites enable better catalytic performance; however, their synthesis is non-trivial. Here, a simple treatment is presented that enables the growth of nanosized fins on zeolites that act as pseudo-nanoparticles, reducing deactivation rates for methanol-to-hydrocarbon catalysis.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
content type line 23
SC0001004; SC0014468
USDOE Office of Science (SC)
ISSN:1476-1122
1476-4660
1476-4660
DOI:10.1038/s41563-020-0753-1