Oxidation Mechanism of Copper at 623-1073 K
نویسندگان
چکیده
منابع مشابه
Mechanism of copper(I)/TEMPO-catalyzed aerobic alcohol oxidation.
Homogeneous Cu/TEMPO catalyst systems (TEMPO = 2,2,6,6-tetramethylpiperidine-N-oxyl) have emerged as some of the most versatile and practical catalysts for aerobic alcohol oxidation. Recently, we disclosed a (bpy)Cu(I)/TEMPO/NMI catalyst system (NMI = N-methylimidazole) that exhibits fast rates and high selectivities, even with unactivated aliphatic alcohols. Here, we present a mechanistic inve...
متن کاملA high temperature structural phase transition in crocoite ( PbCr 04 ) at 1068 K : crystal structure refinement at 1073 K and thermal expansion tensor determination at 1000 K
High-resolution, neutron time-of-flight, powder diffraction data have been collected on natural crocoite between 873 and 1073 K. Thermal analysis carried out in the 1920s had suggested that chemically pure PbCr04 exhibited two structural phase transitions, at 964 K, to the ~ phase, and at 1056 K, to the y phase. In this study, no evidence was found for the (.(-~ structural phase transition, how...
متن کاملTetragonal CeNbO(4) at 1073 K in air and in vacuo.
The structure of the high-temperature scheelite-type polymorph of cerium niobium tetraoxide, CeNbO(4), has been determined using time-of-flight neutron powder diffraction data collected both in situ at 1073 K in air and in vacuo. In both cases, the structure was found to be tetragonal, with I4(1)/a symmetry and without any significant deviation from the stoichiometric composition.
متن کاملSound velocities and single-crystal elasticity of orthoenstatite to 1073 K at ambient pressure
Single-crystal Brillouin spectroscopy measurements have been carried out to 1073 K and ambient pressure to determine the elastic odulus tensor of a natural orthopyroxene, nearly pure Mg end-member (Mg0.994Fe0.002Al0.004)2(Si0.996Al0.004)2O6 orthoenstatite. hree single-crystal specimens with orthogonal crystallographic orientations were prepared for Brillouin measurements to determine ll the sin...
متن کاملThe Gas Phase Oxidation of Acetaldehyde Reaction Mechanism and Kinetics
The mechanism of the low temperature oxidation of gaseous acetaldehyde was investigated in the temperature range of 1 50-400?°C. The minor, intermediate and major products were identified and measured quantitatively by sampling directly into the ionization chamber of an MS10-C2 mass spectrometer from the reactor. The formation of H2O, CO, CO2, HCOOH, H2, HCHO, CH3COOH and CH3OH as the major pro...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: MATERIALS TRANSACTIONS
سال: 2002
ISSN: 1345-9678,1347-5320
DOI: 10.2320/matertrans.43.2173