Manganese–lanthanum oxides modified with silver for the catalytic combustion of methane

The improved reactivity of manganese catalysts by Ag in catalytic oxidation of toluene

“…SBA-15 was synthesized by using triblock copolymer P123 (EO 20 PO 70 EO 20 ) as a structure directing agent according to the procedure reported by Zhao et al [25], and Ag-Mn/SBA-15 catalysts were prepared by incipient wetness impregnation method. It involved the impregnation of SBA-15 with proper amount of Mn(NO 3 ) 2 and AgNO 3 .…”

“…Gac et al have found the decrease of Mn O bonds strength due to the silver effect is useful for the increase of the activity [19]. And the improvement of lattice oxygen mobility of manganese oxides sharply increases the reactivity of Mn-Ag catalysts for CO oxidation [20].…”

“…A combination of Ag and Mn seems to be an important contributing factor to the reactivity [19][20][21][22][23][24]. However the details of application in toluene catalytic oxidation are not yet available.…”

La–Ag–Co perovskites for the catalytic flameless combustion of methane

“…During the last years Ag-substituted perovskites were investigated. In particular, it was found that the introduction of Ag (10-30 mol%) in the structure of LaMnO3 [3][4][5], LaFeO3, LaFe0.5Co0.5O3 [6] and LaCoO3 [7] led to increasing activity with respect to unsubstituted samples. Song et al.…”

Effect of MnO2 Crystalline Structure on the Catalytic Oxidation of Formaldehyde

“…On the basis of results, AOS decreases in the order of δ-MnO 2 (3.55) > β-MnO 2 (3.53) > γ-MnO 2 (3.52) > α-MnO 2 (3.18), which suggests that the part of Mn 4+ in δ-MnO 2 is the highest. It was reported that high Mn 4+ concentration is advantageous to the catalytic combustion of hydrocarbons (Machocki et al, 2004;Wu et al, 2013). Comparison of Mn 4+ ion concentration of catalysts, β-MnO 2 should have the best catalytic activity of all, but this does not match the experimental results.…”