Effects of the Morphology of MnO2 Nanostructures on the Catalytic Oxidation of Toluene
Source abstract
Abstract
Three MnO 2 samples with flower (F-MnO 2 ), rod (R-MnO 2 ), and tube (T-MnO 2 ) morphologies were constructed herein for catalytic toluene oxidation. T-MnO 2 is superior to the other two in terms of catalytic performance and water resistance stability for toluene combustion. Overall structural and physicochemical properties characterized by X-ray diffraction, Raman spectroscopy, N 2 adsorption–desorption, H 2 temperature-programmed reduction, O 2 temperature-programmed desorption, X-ray photoelectron spectroscopy, and toluene temperature-programmed desorption verified that T-MnO 2 exhibited larger specific surface area, stronger reducibility, and more plentiful surface oxygen species than F-MnO 2 and R-MnO 2, which could greatly enhance the activation and mobility of oxygen species. Notably, in situ diffuse-reflectance infrared Fourier transform spectroscopy was conducted to investigate the relationship between the activity and surface oxygen species on these catalysts. It was found that the surface lattice oxygen played an important role in the activation–oxidation process of toluene, and the difference in the surface oxygen species on the catalysts led to obvious activity changes due to their different morphologies.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Catalytic Processes in Materials Science · Catalysis and Oxidation Reactions · Industrial Gas Emission Control
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials, Heilongjiang University, Harbin 150080, P. R. China
Heilongjiang Key Laboratory of Photoelectric Functional Materials, School of Chemistry and Chemical Engineering, Mudanjiang Normal University, Mudanjiang 157011, P. R. China
College of Automotive Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu 224051, China
Funding
National Natural Science Foundation of China
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