1 research outputs found
Lattice Compressive Strain of Co<sub>3</sub>O<sub>4</sub> Induced by Synthetic Solvents Promotes Efficient Oxidation of Benzene at Low Temperature
A series of Co3O4 with different
surface
defective structures were prepared by the solvothermal method and
tested for the activity of benzene oxidation. The characterizations
revealed that the synthetic solvent had a dramatic effect on the composition
of Co3O4 precursors as well as the physicochemical
properties of Co3O4. Although all Co3O4 exhibited a cubic spinel structure, Co3O4 prepared with triethylene glycol (Co-TEG) had the highest
compressive strain due to the nature of high viscosity of triethylene
glycol. These in turn affected the surface chemical structure and
the low-temperature redox properties. Co-TEG exhibited the best benzene
oxidation activity and showed excellent stability and good water resistance.
In situ diffuse reflectance infrared Fourier transform spectroscopy
was used to study the oxidation process of benzene. It was found that
Co-TEG with more defective structures had abundant surface adsorbed
oxygen and active lattice oxygen, which promoted the conversion of
benzene and the corresponding intermediates at low temperature