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• W4280492737 abstract "The number of cars used worldwide is constantly growing. In this regard, the problem of combating atmospheric pollutants - exhaust gases of internal combustion engines is of particular relevance. Over the years, automakers have made many improvements to car engine design and fuel systems to meet pollution limits. One of the best solutions to this problem is the use of a so-called catalytic converter (converter) or simply a catalyst with a high content of noble metals, the main function of which is the simultaneous oxidation of unburned hydrocarbons and CO, as well as the reduction of nitrogen oxides. It was found that the addition of rare earth metals to Pd, Pt catalysts improves their properties and reduces the proportion of noble metals in the composition of catalysts. The paper presents the results of a study of complexation in the Eu 3+ -ligand system, where the ligand is an organic acid, by photocolorimetric and potentiometric methods. In the Eu 3+ -gallic acid system, a stable complex of the composition MeLn x – 1:2 is formed. In the Eu 3+ - oxalic acid system, a stable complex of the composition MeLn x – 1:1 is formed. In the Eu 3+ -valine system, a stable complex of the composition MeLn x – 1:2 is formed. A new technique for obtaining complex compounds is shown, consisting in adding hydrogen peroxide H 2 O 2 to a solution containing solutions of Eu 3+ salt and organic acid in an aqueous-alcoholic medium to block the reduction of Eu 3+ →Eu 2+ . A technology for obtaining a automotive catalyst has been developed, consisting of successive stages: obtaining complex compounds, applying the obtained complex compounds to ceramic block matrices, drying, applying platinum (palladium) acid, calcination. The presence of the Eu 3+ ion in the ceramic matrix is proved by the method of elemental analysis. The technology can be applied to solve the problem of environmental pollution, such pollutants as exhaust gases of cars containing a lot of harmful substances in their composition." @default.
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• W4280492737 date "2022-01-10" @default.
• W4280492737 modified "2023-10-05" @default.
• W4280492737 title "Technology for obtaining a deposited catalyst based on an aluminosilicate matrix modified with europium oxide" @default.
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• W4280492737 doi "https://doi.org/10.20914/2310-1202-2022-1-208-213" @default.
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