Mo oxide supported on sulfated hafnia: Novel solid acid catalyst for direct activation of ethane & propane

Chemical Information in the L3 X-ray Absorption Spectra of Molybdenum Compounds by High-Energy-Resolution Detection and Density Functional Theory

“…In particular, the white lines of the L 2,3 spectra often reveal a split structure due to crystal field effects. Sensitivity of the white line shape to the crystal field, and, therefore, to the symmetry of the local environment, was successfully applied to the analysis of phase composition and local coordination in many Mo-based compounds. ,,− Since EXAFS studies at these edges are impossible due to the vicinity of the 2p 1/2 and 2p 3/2 levels, L 2,3 -edge spectroscopy cannot fully replace the spectroscopic investigations at the K-edge. Nice examples for a complementary K- and L-edge analysis can be found in refs , , , and − .…”

High-Performance Metal Oxide-Modified V/TiO2 Catalysts for Selective Oxidation of 2-Methylnaphthalene to 2-Naphthaldehyde: An Experimental and Theoretical Study

“…Considering the green chemistry principle, in the last few decades, a number of studies have been devoted to develop a direct oxidation method using molecular oxygen as an oxidizing agent to substitute classic routes with environmentally unfriendly and energy-intensive characteristics. Some of these studies have reported tentative results, such as gas-phase selective oxidation of ethane, propane, propene, and toluene. − Nevertheless, to achieve high activity and selectivity simultaneously by the direct oxidation approach is still a challenging problem. The catalytic oxidation of 2-methylnaphthalene to 2-naphthaldehyde is a typical example.…”

“…The key to improving the catalytic performance in this reaction lies in the development of effective catalysts that can control the oxidation of methyl groups. − ,− It is suggested that the breakage of the C–H bond is the rate-controlling step in the oxidation of methyl of hydrocarbons. It will pass through a fairly large energy barrier to break the C–H bond due to the chemical inertia, and this dehydrogenation process takes a lot of energy input. , In addition, for 2-MN, carbon atoms at positions 1 and 4 in naphthalene rings are also reactive on account of the inductive effect.…”

Direct conversion of methane to C2 hydrocarbons using W supported on sulfated zirconia solid acid catalyst

“…Current industrial technologies for the conversion of natural gas are indirect processes, which are based on energy inefficient and involve complex steps involving the production of syngas (CO and H 2 ) [4]. Direct conversion routes can eliminate the requirement of this intermediate step [5,6] and produce valuable chemicals with high energy efficiency.…”