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Tuning the Metal–Support Interaction by Structural Recognition of Cobalt‐Based Catalyst Precursors
Author(s) -
Larmier Kim,
Chizallet Céline,
Raybaud Pascal
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201502069
Subject(s) - cobalt , catalysis , metal , chemistry , materials science , inorganic chemistry , metallurgy , biochemistry
Controlling the nature and size of cobalt(II) polynuclear precursors on γ‐alumina and silica‐alumina supports represents a challenge for the synthesis of optimal cobalt‐based heterogeneous catalysts. By density functional theory (DFT) calculations, we show how after drying the interaction of cobalt(II) precursor on γ‐alumina is driven by a structural recognition phenomenon, leading to the formation of an epitaxial Co(OH) 2 precipitate involving a Co–Al hydrotalcite‐like interface. On a silica‐alumina surface, this phenomenon is prevented due to the passivation effect of silica domains. This finding opens new routes to tune the metal–support interaction at the synthesis step of heterogeneous catalysts.