Light-induced charge separation and water cleavage in microheterogenous aqueous systems
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N-Methyl-N-(2-propynyl)piperonylamine can be simultaneously lithiated at the terminal acetylenic and at that arom. position which is flanked by both the side chain and an oxygen atom. Under carefully established conditions, the metal occupying the latter o ...
Periodic operation was applied to CO2 hydrogenation to CH4 at 383 K on 2% Ru/TiO2. A continuous feed recycle reactor combined with a diffuse reflectance IR cell and a mass spectrometer was used to follow simultaneously the gas phase CO2 and CH4 as well as ...
Methanol dehydrogenation to formaldehyde was conducted in a fixed-bed flow reactor with sodium carbonate catalyst mixed with active carbons or transition metals. The additives promoted the reaction rate at 880-970 K without modifying formaldehyde selectivi ...
Ion-bombarded polystyrene with a 0.5-keV Ar+ beam has been investigated by means of photoelectron spectroscopy performed with synchrotron radiation. After a dose of 10(15) ions/cm2 the evolution of the valence band of the bombarded sample towards an amorph ...
Sodium salts such as Na2CO3 and Na molybdate are active and selective MeOH dehydrogenation catalysts for the prodn. of water-free HCHO. Profound chem. and structural changes are experienced by the molybdate when employed under normal reaction conditions (5 ...
The photodissociation of water into hydrogen gas is mediated by a catalytic dispersion of fine metal particles. This dispersion is stabilized by polymers of alkylene glycols which are adsorptive to said particles and which act as protective agents in solut ...
Bromide promoted decompn. of tert-Bu bromide in the presence of triphenylphosphine gives, besides isobutene, hydrogen(triphenyl)phosphonium bromide. When heated to approx. 150 DegC in the presence of xylene, the latter salt liberates hydrogen bromide which ...
A compound, in metal-free or metal complex form of formula (1) to (3) in which R is hydrogen or C1-30 alkyl; X is hydrogen, halogen (preferably Cl or Br) or C1-30 alkyl. ...
(Ecole Polytechnique Federale de Lausanne (epfl), Switz.).1995
A new type of hydrogen dissociator for polarized atomic beams, based on a surface-wave discharge at 2.45 GHz, is described. We report dissociation-degree measurements as function of gas throughput, microwave power and oxygen fraction. A dissociation degree ...
The effects of hydrogen diffusion on p-n GaAs junctions have been studied by electron beam induced current (EBIC) and cathodoluminescence (CL) at room temperature. Hydrogen passivates both the acceptors in the p-side of the junction and the donors in the n ...