Controlling the porosity and crystallinity of MgO catalysts by addition of surfactant in the sol-gel synthesis

Novel ketone derivative-based photoinitiating systems for free radical polymerization under mild conditions and 3D printing

“…KOH 40%). [26][27][28] All ketone products were isolated and purified as solids with reaction yields ranging from 79% to 95%.…”

Appraisal of Ni Species Supported on Porous MgO during Ethanol Steam Reforming by XAS

“…This feature is consistent with the dependence of the size of particles on the concentration of the surfactant reported in the sol-gel synthesis of different metal oxides. [9,21,22] The amphiphilic macromolecules adsorbed on the inorganic particles act as a protective layer, favoring interpenetration of the solvent and the separation between the particles, hindering the coalescence growth. [22] Magnesium oxide can adsorb water from the atmosphere leading to its possible conversion into the brucite-like magnesium hydroxide phase.…”

“…[5][6][7][8] In this context, the viability of changing the textural properties of supports with alkaline properties such as MgO by porosity control through the sol-gel synthesis in the presence of surfactants Pluronic P123 and F127 has been demonstrated in a recent study. [9,10] Nickel was selected as an active phase due to its ability to cleave the CÀ C bonds. However, it is not as efficient for cleaving the CÀ H bond.…”

Sol-gel synthesis of nanocrystalline MgO and its application as support in Ni/MgO catalysts for ethanol steam reforming

“…The MgO was prepared using a sol-gel procedure, in the presence of Pluronic P123 surfactant, as described previously [16], adapted from Rezaei et al [21]. Firstly, 0.47 g of the surfactant was solubilized in 3 mL of water, at 60 ºC, under mechanical stirring at 500 rpm.…”

“…There is a need to develop catalyst supports with high surface area and porosity, in order to allow the creation of small particles and the provision of satisfactory acid/base properties. We previously studied the synthesis of porous MgO by combining sol-gel transition with use of the Pluronic P123 surfactant as a structure-directing agent [16]. MgO presents appropriate basicity for improving catalyst performance and avoiding undesirable parallel reactions during ethanol steam reforming [8].…”