The surface and near-surface region of an active catalyst and the adjacent gas-phase reactants were investigated simultaneously under reaction conditions using in situ X-ray photoelectron spectroscopy (XPS). This investigation of methanol oxidation on a copper catalyst showed that there was a linear correlation between the catalytic activity of the sample and the presence of a sub-surface oxyge...

The interaction of an unsupported silver catalyst which had been pretreated by hydrogen at various temperatures with oxygen at 210°C has been studied using Temperature Programmed Reduction (TPR) over a temperature range up to 900°C. Hydrogen treatment at 500°C or above before the oxidation step causes the formation of extra species, thought to be OH groups in the sub-surface of the sample. A pe...

Many synthetically useful reactions are catalyzed by cofactor-dependent enzymes. As cofactors represent a major cost factor, methods for efficient cofactor regeneration are required especially for large-scale synthetic applications. In order to generate a novel and efficient host chassis for bioreductions, we engineered the methanol utilization pathway of Pichia pastoris for improved NADH regen...

Retinyl acetate suppressed the free radical-induced oxidation of methyl linoleate. Retinyl acetate was reacted with an alkylperoxyl radical in two solvent systems, methanol and benzene, The alkylperoxyl radical was generated by the thermal decompositien of a free radical initiator, 2 2'-azobis(2,4-dimethylyaleronitrile), at 370C. The reaction products were isolated by HPLC and their structures ...

BIIbmdARY t a r r 7 a'j';QI 7 1`he peroxidative system involving hepatic catalase plays a major role in t e dation of 6 i c el a /^ ` i methanol in the rat (1), but in the monkey the peroxidative mechanism does not appear to ^0, J be important. This conclusion is based on the following observations: (a) ethanol and °r y methanol were about equally reactive with the peroxidative system, but etha...

Alcoholic solvents, especially methanol, show an activating affect for heteropolyacids in homogenously catalysed glucose transformation reactions. In detail, they manipulate the polyoxometalate-based catalyst a way that thermodynamically favoured total oxidation to CO2 can be completely supressed. This allows nearly 100 % carbon efficiency reaction of methyl formate methanolic solution at mild ...

A series of NaTaO3 photocatalysts were prepared with Ta2O5 and NaOH via a hydrothermal method. CuO was loaded onto the surface of NaTaO3 as a cocatalyst by successive impregnation and calcination. The obtained photocatalysts were characterized by XRD, SEM, UV-vis, EDS and XPS and used to photocatalytically reduce CO2 in isopropanol. This worked to both absorb CO2 and as a sacrificial reagent to...

Multi-Layered PtAu Nanoframes In article number 2206377, Insub Jung, Sungho Park, and co-workers present the rationale design of multi-layered nanoframes via multiple synthetic pathways for plasmon-enhanced electrocatalytic activity. Plasmonic hot spots formed between inner outer frames promote light-induced enhancement toward methanol oxidation reaction. Notably, authors demonstrate correlatio...

The thermal oxidation of propane in the temperature range 350-425oC was studied in order to elucidate the role of higher aldehydes as degenerate branching intermediates in the oxidation of hydrocarbons. In the slow combustion of propane, the high yield of propylene and methanol as the primary products, the formation of hydrogen peroxide, carbon monoxide, carbon dioxide, formaldehyde and steam a...