Isotopic Oxygen Exchange between Dioxygen and MgO Catalysts for Oxidative Coupling of Methane

The Role of Acetic Acid in Magnesium Oxide Preparation via Chemical Precipitation

“…19,20 When acetic acid was added in the precursor solution, the maximum endothermic peak shifted from 382.41 to 351.21C. The results indicate that the addition of acetic acid can significantly facilitate the transition from Mg(OH) 2 to MgO, which is consistent with the XRD analysis. These can be interpreted to yield a coordination compound of carboxyl group with Mg atom of magnesium hydroxide (Mg(OH) x (OCOCH 3 ) 2Àx ), which is decomposed relatively easily at a lower temperature.…”

“…In this article, we studied the effect of acetic acid in MgO synthesis via chemical precipitation. The characterization results of the precursors and MgO products by XRD, FT-IR, and DTA demonstrated that acetic acid could play a chemical modification role to enhance the crystal growth of the precursor Mg(OH) 2 in (001) orientation, and lower the transition temperature from Mg(OH) 2 to MgO in favor of the crystallization of MgO, which could be attributed to the formation of coordination compound between carboxyl group and magnesium hydroxide.…”

“…The as-synthesized precursors and MgO powders were characterized by X-ray powder diffraction, Fourier-transformed infrared spectroscopy, and differential thermal analysis. Compared with the samples without using acetic acid, the addition of acetic acid as a chemical modifier can enhance the crystal growth of the precursor Mg(OH) 2 in (001) orientation, and significantly lower the transition temperature from Mg(OH) 2 to MgO, which could be due to the formation of a bidentate coordination compound of carboxyl groups with magnesium hydroxide.…”

Quantum chemical modelling case studies relevant to metal oxide dissolution and catalysis

“…The catalytic reaction of CH 4 with CO 2 on MgO catalysts [30,31,32] uses cheap and abundant reactants (CH 4 and CO2) to produce a valuable product, syngas, that is used in many industrial processes (eq. 4).…”

Three‐Dimensional Magnesia‐Based Nanocrystal Assemblies Via Low‐Temperature Magnesiothermic Reaction of Diatom Microshells

“…M agnesia and magnesia‐based compositions are widely used in agricultural (e.g., in additives to livestock feed, in fertilizers, as a carrier for pesticides), pharmaceutical (e.g., as a nutrient supplement, antacid, and in ointments and cosmetics), electrical and thermal (e.g., as a cell separator in molten salt‐based batteries, as electrical insulation for heating elements), chemical/petrochemical (e.g., as a catalytic substrate for the oxidative coupling of methane; as a thickener catalyst, acid acceptor, or filler in the production of plastics), environmental (e.g., for acid neutralization or heavy‐metal precipitation from wastewater streams; for sulfur dioxide removal from gaseous emissions), cement, and steel manufacturing (e.g., for refractories; in oxychloride cements for fireproofing of flooring, wallboards, and tiles; and as an annealing separator in the fabrication of high‐silicon steel sheets for magnetic cores), and numerous other applications 1–14 . Nanocrystalline magnesia‐based materials have exhibited enhanced catalytic/chemical, biological, optical, and mechanical properties 15–27 .…”