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Synthesis of Crystalline OMS‐2 with Urea Hydrogen Peroxide and its Application in Aerobic Oxidation Reactions
Author(s) -
Li Bo,
Bi Xiuru,
Zhou Jinbo,
Li Changming,
Zhao Peiqing,
Meng Xu
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201901205
Subject(s) - cryptomelane , hydrogen peroxide , catalysis , chemistry , high resolution transmission electron microscopy , x ray photoelectron spectroscopy , urea , inorganic chemistry , thermite , nuclear chemistry , materials science , chemical engineering , manganese oxide , organic chemistry , nanotechnology , transmission electron microscopy , engineering , aluminium
Cryptomelane‐type manganese oxide (OMS‐2) was synthesized successfully using urea hydrogen peroxide (urea⋅H 2 O 2 ) as the reductant in an acidic buffer solution. As‐prepared crystalline material was fully characterized by XRD, BET, XPS, SEM and HRTEM. The results demonstrate that OMS‐2 has nanofiber with short nanorod morphologies, very rich oxygen vacancy defects and more exposed crystal facets compared with ones synthesized with other H 2 O 2 ‐containing reductants. These unique properties make nanostructural OMS‐2 an excellent heterogeneous catalyst in aerobic oxidation reactions, such as selective oxidation of mercaptan and oxygenation of alkylarenes.