Preparation method and application of Pt-based catalyst
A catalyst and solvent technology, applied in the field of preparation of Pt-based catalysts, to achieve the effects of increasing yield and selectivity, high phenol hydrogenation activity, and reducing reaction conditions
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[0032] Embodiments of the present invention propose a method for preparing a Pt-based catalyst, comprising the following steps:
[0033] (1) Mixing a Pt precursor, an oxide carrier and a solvent into a solution;
[0034] (2) Ultrasonic treatment is performed on the mixed solution; each component is fully mixed, and the metal precursor molecules are fully adsorbed on the surface of the carrier;
[0035] (3) spreading the mixed solution after ultrasonic treatment into a plane to form a thin liquid film;
[0036] (4) Under the set atmosphere, the plane with the mixed solution obtained in step (3) is heated to the set temperature at the set heating rate for the thin liquid film, and the temperature is kept to obtain the Pt / oxide powder;
[0037] (5) Wash the Pt / oxide powder with water and ethanol respectively, filter until all unreacted soluble precursors and other impurities are removed, and dry the filter at room temperature for 12 hours to obtain a Pt-based catalyst.
[0038]...
Embodiment 1
[0050] First, configure the precursor-carrier mixed solution required for the experiment, and use chloroplatinic acid, titanium oxide and deionized water to form a 100 mg / ml chloroplatinic acid-titanium oxide solution, in which the metal precursor is relative to the amount of titanium oxide in terms of Pt. The mass ratio is 5%. After ultrasonic treatment, the obtained solution was evenly spread on a flat surface. The container in which the mixed solution was spread was heated to 450° C. in air at a heating rate of 1000° C. / min, and kept at this temperature for 30 minutes. The powder obtained after the reaction was collected and washed with water until all unreacted precursors and other impurities were removed, and the solid obtained after washing was dried at room temperature for 12 h to obtain Pt / TiO 2 catalyst. figure 1 It is the Pt / TiO prepared in this example 2 Scanning transmission electron microscope image of the catalyst, from figure 1 It can be seen that the embodi...
Embodiment 2
[0052] First, configure the precursor-carrier mixed solution required for the experiment, and use sodium chloroplatinite, alumina, and ethanol to form a 50 mg / ml sodium chloroplatinite-alumina solution, in which the metal precursor is relative to the oxide in terms of Pt. The mass ratio of aluminum is 20%. After ultrasonic treatment, the obtained solution was evenly spread on a flat surface. The container in which the mixed solution was spread was heated to 800° C. at a heating rate of 10° C. / min in nitrogen, and kept at this temperature for 60 minutes. The powder obtained after the reaction was collected and washed with water until all unreacted precursors and other impurities were removed, and the solid obtained after washing was dried at room temperature for 12 hours to obtain Pt / Al 2 o 3 catalyst. figure 2 is shown as the Pt / Al prepared in Example 2 2 o 3 Scanning transmission electron microscope image of the catalyst.
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