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Confined Pt 1 1+ Water Clusters in a MOF Catalyze the Low‐Temperature Water–Gas Shift Reaction with both CO 2 Oxygen Atoms Coming from Water
Author(s) -
RiveroCrespo Miguel A.,
Mon Marta,
FerrandoSoria Jesús,
Lopes Christian W.,
Boronat Mercedes,
LeyvaPérez Antonio,
Corma Avelino,
HernándezGarrido Juan C.,
LópezHaro Miguel,
Calvino Jose J.,
RamosFernandez Enrique V.,
Armentano Donatella,
Pardo Emilio
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201810251
Subject(s) - water gas shift reaction , chemistry , valence (chemistry) , adsorption , molecule , catalysis , metal , reactivity (psychology) , oxygen , water splitting , coordination sphere , inorganic chemistry , metal organic framework , organic chemistry , medicine , alternative medicine , pathology , photocatalysis
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 Pt 1 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 + H 2 O → CO 2 + H 2 ), where both metal coordinated and H‐bonded water molecules trigger a double water attack mechanism to CO and give CO 2 with both oxygen atoms coming from water. The stabilized Pt 1+ single sites allow performing the WGSR at temperatures as low as 50 °C.