Evidence of furan formation from acetaldehyde over β-UO3

Template‐Free Synthesis and Mechanistic Study of Porous Three‐Dimensional Hierarchical Uranium‐Containing and Uranium Oxide Microspheres

“…However, the composition and the phase could greatly influence its catalytic performance. For instance, UO 2 is an active catalyst for the dehydration/dehydrogenation of ethanol,6 while U 3 O 8 exhibits high oxidative activity for the destruction of volatile organic compounds,7 and β‐UO 3 is more active for the formation of furan from acetaldehyde 8. Therefore, targeted synthesis of uranium oxides with specific compositions and phases is important for many related applications.…”

Acetaldehyde reactions over the uranium oxide system

“…2. We have previously shown that U oxides are active for several C-C bond formation reactions: making isobutene from acetone on α-U 3 O 8 [18]; making furan from acetylene [19], ethylene [20], acetaldehyde [21], or ethanol [22] on β-UO 3 ; and making ethylene from formaldehyde on UO 2 (111) single crystals [23].…”

“…We preferred to study acetaldehyde for two reasons. First, it reacts to give a high yield of furan on β-UO 3 [21]; furan is a desired product that enters into a wide variety of chemical compounds [24,25]. Second, acetaldehyde is an intermediate molecule that can be easily oxidized or reduced depending on the environment; this is one of the main reasons why acetaldehyde has been studied by several workers over a large number of surfaces including Ru (001) [26], Ag (111) [27], Pt(S)-[6(111) × (100)] [28], Pd (111) [29], Rh (111) [30], SrTiO 3 (100) [31] and TiO 2 (001) [32] single crystals, and SiO 2 [33,34], TiO 2 [32,35], and CeO 2 [36] powders.…”

Selective Oxidation of Alkenes over Uranyl-Anchored Mesoporous MCM-41 Molecular Sieves

“…Uranium-based oxide catalysts have also been found to exhibit excellent activity in the oxidation and dehydration of various hydrocarbons. 23,24 On the other hand, the mesoporous materials, designated as the M41S family, comprising hexagonal MCM-41 and cubic MCM-48 structures, are used as supports for a number of catalytically active metal oxides owing to their large pore diameters (2-20 nm), high surface areas (700-1500 m 2 g -1 ), and substantial amounts of silanol (defect sites) groups (30-40%). 25 In this study, we present a detailed investigation of the synthesis and characterization of hexavalent uranium substituted in hexagonal mesoporous MCM-41 molecular sieves.…”

“…Suib and co-workers employed uranyl-exchanged clays and zeolites for the photooxidation of ethanol, isopropyl alcohol, and diethyl ether to yield the corresponding aldehydes and ketones. − In another study, the photocatalytic oxidation of ethanol solution by UO 2 2+ -doped glass resulted in the formation of acetaldehyde. Uranium-based oxide catalysts have also been found to exhibit excellent activity in the oxidation and dehydration of various hydrocarbons. , …”