Regioselective Generation of Single‐Site Iridium Atoms and Their Evolution into Stabilized Subnanometric Iridium Clusters in MWW Zeolite. Issue 36 (6th August 2020)

• Record Type: Journal Article
• Authors: Liu, Lichen; Lopez‐Haro, Miguel; Meira, Debora M.; Concepcion, Patricia; Calvino, Jose J.; Corma, Avelino
• Is Part Of: Angewandte Chemie international edition. Volume 59:Issue 36(2020)
• Page Start: 15695
• Page End: 15702
• Publication Date: 2020-08-06
• Subjects: alkane hydrogenolysis -- clusters -- iridium -- single atoms -- zeolite; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.202005621
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Preparation of supported metal catalysts with uniform particle size and coordination environment is a challenging and important topic in materials chemistry and catalysis. In this work, we report the regioselective generation of single‐site Ir atoms and their evolution into stabilized subnanometric Ir clusters in MWW zeolite, which are located at the 10MR window connecting the two neighboring 12MR supercages. The size of the subnanometric Ir clusters can be controlled by the post‐synthesis treatments and maintain below 1 nm even after being reduced at 650 °C, which cannot be readily achieved with samples prepared by conventional impregnation methods. The high structure sensitivity, size‐dependence, of catalytic performance in the alkane hydrogenolysis reaction of Ir clusters in the subnanometric regime is evidenced. Abstract : Isolated iridium atoms and subnanometric iridium clusters are regioselectively generated and stabilized in the 10MR window of MWW zeolite for shape‐selective activation of alkanes.