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High Efficient Mesoporous Co 3 O 4 Nanocatalysts For Methane Combustion at Low Temperature
Author(s) -
Han Zhen,
Zhang Hengqiang,
Dong Bing,
Ni Yangyang,
Kong Aiguo,
Shan Yongkui
Publication year - 2016
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201600211
Subject(s) - nanomaterial based catalyst , mesoporous material , catalysis , methane , materials science , calcination , nanomaterials , transition metal , combustion , chemical engineering , x ray photoelectron spectroscopy , oxide , vacancy defect , catalytic combustion , nanotechnology , nanoparticle , chemistry , crystallography , metallurgy , organic chemistry , engineering
Co 3 O 4 nanomaterials with different morphology were easily prepared by calcining Co(OH) 2 precursor at different temperatures. The obtained mesoporous Co 3 O 4 with special surface structure had excellent catalytic activity for methane combustion. The specific rate of methane combustion over mesoporous Co 3 O 4 reach up to 1.8 μmol g −1 s −1 at 300 °C. It is close to the specific rate over the supported noble metal catalysts and higher than that over the transition metal oxide catalysts reported in the literature. TEM images, H 2 ‐TPR profiles and XPS spectra analysis testified that some vacancy, antisite, dislocation and grain boundary defects in narrow junction regions around the pore openings may be the origin of the excellent catalytic activity of the mesoporous Co 3 O 4 nanomaterials.