Confined Pt11+ Water Clusters in a MOF Catalyze the Low‐Temperature Water–Gas Shift Reaction with both CO2 Oxygen Atoms Coming from Water. (27th November 2018)

• Record Type: Journal Article
• Authors: Rivero‐Crespo, Miguel A.; Mon, Marta; Ferrando‐Soria, Jesús; Lopes, Christian W.; Boronat, Mercedes; Leyva‐Pérez, Antonio; Corma, Avelino; Hernández‐Garrido, Juan C.; López‐Haro, Miguel; Calvino, Jose J.; Ramos‐Fernandez, Enrique V.; Armentano, Donatella; Pardo, Emilio
• Is Part Of: Angewandte Chemie. Volume 130:Number 52(2018)
• Page Start: 17340
• Page End: 17345
• Publication Date: 2018-11-27
• Subjects: Einzelatomkatalysatoren -- Metall-organische Gerüstverbindungen (MOFs) -- Platin -- Wassercluster -- Wassergas-Shift-Reaktion; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201810251
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: The synthesis and reactivity of single metal atoms in a low‐valence state bound to just water, rather than to organic ligands or surfaces, is a major experimental challenge. Herein, we show a gram‐scale wet synthesis of Pt1 1+ stabilized in a confined space by a crystallographically well‐defined first water sphere, and with a second coordination sphere linked to a metal–organic framework (MOF) through electrostatic and H‐bonding interactions. The role of the water cluster is not only isolating and stabilizing the Pt atoms, but also regulating the charge of the metal and the adsorption of reactants. This is shown for the low‐temperature water–gas shift reaction (WGSR: CO + H2 O → CO2 + H2 ), where both metal coordinated and H‐bonded water molecules trigger a double water attack mechanism to CO and give CO2 with both oxygen atoms coming from water. The stabilized Pt 1+ single sites allow performing the WGSR at temperatures as low as 50 °C. Abstract : Wasser marsch : Ein Katalysator bestehend aus Pt1 1+, das ausschließlich an H2 O‐Moleküle koordiniert, kann in den Poren einer Metall‐organischen Gerüststruktur (MOF) hergestellt werden. Er überträgt zwei H2 O‐Moleküle auf CO und liefert in sehr effizienter Weise CO2 und H2 (Wassergas‐Shift‐Reaktion) bei 50–150 °C.