The presumption is that diffusion of oxygen into the Sn thin film results in the lattice expansion of metal oxide phases which place the film under compressive stress. The increased stress is subsequently relieved in part by growth of Sn whiskers. In order to clarify the role of oxygen on ...
Many workers have shown that the oxidation rate of iron‐chromium alloys initially drops sharply with increasing chromium but eventually reaches a minimum of about 20% chromium and then rises for more chromium rich alloys. From the graph of oxidation rate in pure oxygen against chromium content ...
However, the diffusion properties of lattice oxygen are generally unstable with the gradual reduction of the OC or with the number of chemical looping cycles. As a result, revealing the transferability characteristics of the lattice oxygen and evaluating the transformation of the lattice oxygen is ...
The reduced form, where no oxygen is adsorbed on Pt atoms, can be stable as a transition state during a catalytic process19,26. For NO oxidation, the pathway shown in Figure 1 builds upon the recently published first-principles study of Pt atoms supported on the (010) surface of θ-Al2...
Ozone is a bluish gas with a pungent smell and is an extremely reactive and unstable allotrope of oxygen (O2). The physical properties of ozone are listed in Table 2 (compiled from [2]). Table 1. Typical Advanced Oxidation Processes (AOP). H2O2/UVFe2+/H2O2(Fenton System)O3/H2O2 O3/...
autotrophic growth35, though prior studies have suggested this enzyme is oxygen-sensitive, and instead, involved in anaerobic sulfidogenic growth36,37. In light of recent discoveries in bacteria, it also remains to be tested whether archaea are capable of consuming H2gas at sub-micromolar ...
The oxidation number of oxygen in compounds is usually -2. Exceptions include OF2because F is more electronegative than O, and BaO2, due to the structure of the peroxide ion, which is [O-O]2-. The oxidation number of aGroup IA elementin a compound is +1. ...
A sensor for measuring the oxygen and/or unburnt fuel content of a combustion gas includes an outer tube (20) sealed at one end by a pellet (17) of oxygen sensitive solid electrolyte. Solid electrolyte (17) has an electrode (21) formed on the outer side thereon. The sensor also include...
The results showed that the number of oxygen vacancies increased with the increase of Cu content. The presence of Cu enhanced the reducibility of the catalyst and increased the mobility of lattice oxygen. Wang et al. [93] studied the effects of nano-CeO2 supports with different morphologies. ...
Electrochemical two-electron water oxidation is a promising route for renewable and on-site H2O2 generation as an alternative to the anthraquinone process. However, it is currently restricted by low selectivity due to strong competition from the traditio