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Nanoporous, crystalline zeolites are used as catalysts in numerous energy, environmental and chemical manufacturing processes. Because of the molecular-sized pores, diffusion limitations are common. However, it has recently become clear that molecular transport limitations do not only occur inside听the zeolite crystals or in the pore channel network of听catalyst pellets containing them. The transport limiting step could be crystal surface barriers (like a skin!).

In this new article, we show how it is possible to reduce these surface barriers, via a thin layer of silica deposition that alters the "skin" properties, facilitating transport. This leads to a significant increase in observed catalytic activity, shown here for isomerization of n-pentane as a test reaction.听This work is the result of another excellent collaboration with CNIE alumnus and ECUST (Shanghai) Associate Professor and long-time collaborator Professor . Special congratulations to PhD student, Shen Hu.

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Reference: S. Hu, J. Liu, G. Ye*, X. Zhou, M.-O. Coppens* and W. Yuan, 2021, Effect of External Surface Diffusion Barriers on Platinum/Beta鈥怌atalyzed Isomerization of听n鈥怭别苍迟补苍别. Angew. Chemie Int. Ed. 60.