Catalytic combustion of ethyl acetate and nano-structural changes of ruthenium catalysts supported on tin oxide

Titania‐Supported Catalysts for Levulinic Acid Hydrogenation: Influence of Support and its Impact on γ‐Valerolactone Yield

“…[37] By contrast, as ubstantial difference was visible for both catalysts prepared by chemical reduction,f or which the Ru signal was considerably higher andi nt he same range than for the Ru/TiO 2 (R20) catalyst. Both samples after calcination displayed lower Ru signals, probably caused by the presence of large RuO 2 agglomerates.…”

“…As mall Ru intensity in- crease was observed after thermalr eduction, probablyc aused by the absence of interaction between such large agglomerates and the support, so that during the high temperature hydrogen treatment, partial redispersion occurred. [37] By contrast, as ubstantial difference was visible for both catalysts prepared by chemical reduction,f or which the Ru signal was considerably higher andi nt he same range than for the Ru/TiO 2 (R20) catalyst. This is in agreement with the TEM observations,i nw hich more Ru particles were observed on the surface of Ru/TiO 2 (A-3).…”

Bimetallic Ru-Re/γ-Al2O3 catalysts for the catalytic combustion of propane: Effect of the Re addition

“…Recently, we have shown that activity of ruthenium in the butane and propane oxidation decreased during a few successive catalytic runs or after treatment in oxygen at temperature above 250 • C [7,9]. The literature data also confirmed activity loss of the Ru catalysts during VOCs combustion [8]. It has been proposed that the deactivation is due to nanoparticle sintering or to the formation of bulk RuO 2 oxide that possesses lower activity than that of dispersed RuO x species [7,9].…”

“…Propane, toluene and orthoxylene oxidation over Ru/CeO 2 [5] and Ru/␥-Al 2 O 3 was studied [6], butane and ethyl acetate oxidation over Ru supported on ␥-Al 2 O 3 and SnO 2 was investigated [7,8]. Recently, we have shown that activity of ruthenium in the butane and propane oxidation decreased during a few successive catalytic runs or after treatment in oxygen at temperature above 250 • C [7,9].…”

Nanostructured copper, chromium, and tin oxide multicomponent materials as catalysts for methanol decomposition: 11C-radiolabeling study

“…However, tin oxide based materials have received much less attention in catalysis. There are only few reports where the catalytic activity of these materials in oxidative dehydrogenation of hydrocarbons [2][3][4], selective catalytic reduction of NO x by hydrocarbons [5][6][7] or CO [6], low temperature oxidation of CO [8,9] or methane [10,11], volatile organic compounds combustion [12][13][14], and methanol steam reforming [1,15] was tested. It was discussed that the crucial point in catalytic behavior of SnO 2 concerned its easy reducibility leading to the simultaneous existence of Sn 2+ and Sn 4+ surface sites and a propensity to generate oxygen defects during thermal treatment [1].…”