Ir O4+cations have been generated and observed in mass spectra(MS),a recent letter in Nature reported[1].IX is now the highest known formal oxidation state,according to the paper.The authors have characterized[Ir O4]+·Ar by IR photodissociation spectroscopy,and the spectrum is consistent with...
Chemical oxidation increases the oxidation state of a contaminant and decreases the oxidation state of the reactant. The following is an example of an oxidation reaction (Table 5.5): Table 5.5. Effectiveness of chemical oxidation on general contaminant groups for liquids, soils, and sludge ...
To date, the effect of oxidation state on activity remains controversial in whether higher or lower oxidation states benefit the enhancement of catalytic activity. Herein, we discover a volcanic relationship between oxidation state and hydrogen evolution reaction activity based on Os single-atom catalysts...
oxidation state of Mn in minerals that took place during the existence of Kenorland, from 3.0 to 2.5 Ga. This early oxidation of Mn predates most estimates of the timing of the GOE4,14,18, making it initially appear as a curious anomaly. However, Johnson et al.44found evidence of ...
. The occurrence ofmanganese oxides(Lanza et al., 2016) also indicates that oxidation of Mn2+occurred, as the localized concentration of manganese requires transport in its more soluble reduced state. This record of reduced species, along with oxidation processes, indicates that the site had ...
Indeed, alterations in the structure, functions, and oxidation state of muscle proteins have been observed in aged F344BN mice [47]. The content of regulatory proteins was reduced by up to 75%, while the catalytic activity of enzymes decreased by up to 50% in mice with aging. Additionally...
Oxidation resistance of Mg-Y alloys at elevated temperatures and the protection performance of the oxide films Oxidation behaviours of Mg-xY (x- 0.5, 1.0, 1.7, 3 Xiaowen,Jiang,Bin,... - Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry...
The use of XANES spectroscopy, both in classical and in dispersive geometries, is illustrated for the study of copper-based catalysts under in situ or in operando conditions. As case studies, copper-exchanged MFI zeolites and CuCl2/γ-Al2O3 systems are considered. In the former case, in situ...
Additionally, to our knowledge, the impact of humidity in the gas stream on high-temperature oxidation of CrMnFeCoNi and CrCoNi has not been studied so far. We now shortly review the state of knowledge regarding the oxidation behavior of Fe- and Ni-based engineering alloys in a humid ...
Naseri et al.34 noted that the graphitic shell of soot was highly resilient to O2, and the activation energy for surface oxidation was high. The mature soot presented an oxidation mode of slowly shrinking throughout the process with spherical particles. It was described as slow SCM. The in ...