We attempted to simplify and unify the former concepts describing the acid base character of oxides on the basis of their band structure. Duffy optical basicity, Smith acid scale and Bratsch electronegativity model can simply be linked by taking into account the electronegativity and the chemical ...
KI Tanaka,A Ozaki - 《Journal of Catalysis》 被引量: 216发表: 1967年 Oxidation state of iron in silicate glasses and melts: a thermochemical model properties of dissolved oxides (nephelauxetic parameters, electronegativity, fractional ionic character of the bond) and polymerization constants in simp...
Bases are metal oxides or hydroxides or amines. See also Lewis base 8. (Biochemistry) biochem any of the nitrogen-containing constituents of nucleic acids: adenine, thymine (in DNA), uracil (in RNA), guanine, or cytosine 9. (Dyeing) a medium such as oil or water in which the pigment ...
In addition to the well-known redox character, the acid-base property is another interesting aspect of ceria-based catalysts. The acid-base catalysis of ceria surfaces depends on the coordination environments of surface Ce and O sites and varies with the morphology and exposed facets of CeO2 NCs...
CO affects the distribution of different –OH groups on theoxidesurface, and the calculation results show that CO is more easily and stably adsorbed on the oxide surface than COS. In general, under the N2atmosphere, COS adsorbs directly on the surface of MgAlCe oxides, and most of the –...
What is determining during the system formation is the acid-base character of the interaction between the separate compounds. Such an interaction develops not only within each phase of the system, but also on the interfaces. Such a concept must be applied to polymer formation in the presence of...
Surface intermediates generated in the decomposition of Cl chlorofluorocarbons over oxides and zeolites of acid-base and redox character The surface products of the decomposition of simple chlorofluorocarbons over solid oxides and aluminosilicates were investigated by several research groups... KJB Nagy - ...
investigation, the decrease of pressure in the process of long-term contact of Freon 22 with the surface of MgO, irreversible character of adsorption and the absence of fluorine and chlorine-containing products in a gaseous phase give evidence of CFC destructive adsorption on the surface of ...
hydrogenationofnitrates,buttheselectivitytoammoniumwashigh.Nb-dopingslightlydecreasedthe reactivityofnitratesandMg-dopingslightlyimprovedthereactivityofnitrites,whereastheselectivityto ammoniumswasonlymarginallymodified.Theactivityandproductsselectivitywereverymoderately affectedbytheacidorbasiccharacterofthesupport,whichsu...
The acid character of group (VI) oxides as inferred from their reaction with molten KNO3 The reaction between CrO 3, MoO 3, and WO 3, and fused KNO 3 at 350° has been studied by measuring the variation in the potential of an oxygen electrode r... SE Din,A.M,E Hosary,... - ...