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Selective Alkane Oxidation by Manganese Oxide: Site Isolation of MnO x Chains at the Surface of MnWO 4 Nanorods
Author(s) -
Li Xuan,
Lunkenbein Thomas,
Pfeifer Verena,
Jastak Mateusz,
Nielsen Pia Kjaer,
Girgsdies Frank,
KnopGericke Axel,
Rosowski Frank,
Schlögl Robert,
Trunschke Annette
Publication year - 2016
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.201510201
Subject(s) - dehydrogenation , catalysis , alkane , oxide , propane , vanadium oxide , nanorod , materials science , inorganic chemistry , manganese , vanadium , hydrothermal synthesis , hydrothermal circulation , chemistry , chemical engineering , nanotechnology , organic chemistry , engineering , metallurgy
The electronic and structural properties of vanadium‐containing phases govern the formation of isolated active sites at the surface of these catalysts for selective alkane oxidation. This concept is not restricted to vanadium oxide. The deliberate use of hydrothermal techniques can turn the typical combustion catalyst manganese oxide into a selective catalyst for oxidative propane dehydrogenation. Nanostructured, crystalline MnWO 4 serves as the support that stabilizes a defect‐rich MnO x surface phase. Oxygen defects can be reversibly replenished and depleted at the reaction temperature. Terminating MnO x zigzag chains on the (010) crystal planes are suspected to bear structurally site‐isolated oxygen defects that account for the unexpectedly good performance of the catalyst in propane activation.