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Generation of subnanometric platinum with high stability during transformation of a 2D zeolite into 3D

AuthorsLiu, Lichen; Díaz Morales, Urbano; Arenal, Raul; Agostini, Giovanni; Concepción, Patricia; Corma, Avelino
Issue Date2017
PublisherNature Publishing Group
CitationNature Materials 16: 132-138 (2017)
AbstractSingle metal atoms and metal clusters have attracted much attention thanks to their advantageous capabilities as heterogeneous catalysts. However, the generation of stable single atoms and clusters on a solid support is still challenging. Herein, we report a new strategy for the generation of single Pt atoms and Pt clusters with exceptionally high thermal stability, formed within purely siliceous MCM-22 during the growth of a two-dimensional zeolite into three dimensions. These subnanometric Pt species are stabilized by MCM-22, even after treatment in air up to 540 °C. Furthermore, these stable Pt species confined within internal framework cavities show size-selective catalysis for the hydrogenation of alkenes. High-temperature oxidation-reduction treatments result in the growth of encapsulated Pt species to small nanoparticles in the approximate size range of 1 to 2 nm. The stability and catalytic activity of encapsulated Pt species is also reflected in the dehydrogenation of propane to propylene.
Publisher version (URL)https://doi.org/10.1038/nmat4757
Identifiersdoi: 10.1038/nmat4757
e-issn: 1476-4660
issn: 1476-1122
Appears in Collections:(ITQ) Artículos
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