Chemistry, like all the natural sciences, begins with the direct observation of nature¡ª in this case, of matter.2568-25-4, Name is Benzaldehyde Propylene Glycol Acetal, SMILES is CC1OC(C2=CC=CC=C2)OC1, belongs to copper-catalyst compound. In a document, author is Orozco, Ivan, introduce the new discover, Recommanded Product: Benzaldehyde Propylene Glycol Acetal.
In Situ Studies of Methanol Decomposition Over Cu(111) and Cu2O/Cu(111): Effects of Reactant Pressure, Surface Morphology, and Hot Spots of Active Sites
The dissociative adsorption of methanol was investigated on Cu(111) and ultrathin Cu2O films. We employed synchrotron-based Ambient Pressure X-ray Photoelectron Spectroscopy (AP-XPS) and Scanning Tunneling Microscopy (STM) to study the dynamics of gas-solid interactions, and calculations based on Density Functional Theory (DFT) were used to examine the reaction path. C 1s XPS spectra revealed that methanol underwent dissociative adsorption on plain Cu(111) to form methoxy (CH3O), formaldehyde (H2CO), and formate (HCOO) at a pressure range of 0.5-10 mTorr, with these species remaining on the surface after evacuation. This was accompanied by the appearance of a low coverage (similar to 0.05 ML) of O-ads in the O 1s which can be considered a highly active site for methanol activation. The high activity is apparent by a coverage of 0.8 ML of methoxy at room temperature. STM was unable to image these species at room temperature as they were highly mobile on metallic copper. In contrast, for CH3OH on Cu2O/Cu(111), STM showed clear hot spots for reaction and a complex array of adsorption structures. On the oxide substrate, there was decomposition of methanol to H2CO, CH3O, HCOO, and hydrocarbon species (CHx) due to the subsequent interactions of methanol with lattice oxygen. Cu(111) remained entirely saturated with decomposition products under 10 mTorr of methanol (theta approximate to 0.97 ML), whereas the Cu2O overlayer was saturated at a much lower coverage (theta approximate to 0.30 ML). STM revealed rows and step edges of Cu2O decorated with decomposition products and metallic Cu islands similar to 5 nm in size. The difference in activity between Cu(111) and Cu2O/Cu(111) is attributed to the significant amount of O present on the oxide surface. Density Functional theory (DFT) calculations described the XPS measurements well, showing a likely methanol dissociation to *CH3O and therefore a surface reduction. More importantly, the DFT results revealed that it was the chemisorbed oxygen on Cu2O/Cu(111) which oxidized the dissociated *CH3O to *HCOO and eventually CO2, while the reaction only involving upper oxygen on the Cu2O hexagonal ring led to the formation of H2CO.
The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 2568-25-4 is helpful to your research. Recommanded Product: Benzaldehyde Propylene Glycol Acetal.
Reference:
Copper catalysis in organic synthesis – NCBI,
,Special Issue “Fundamentals and Applications of Copper-Based Catalysts”