Noble metal-loaded catalyst, as well as preparation method and application thereof
A precious metal catalyst and precious metal ion technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problem of high cost of raw materials, influence of catalytic product quality, loss of catalytic activity, etc. problems, to achieve the effect of high dispersion of precious metals, high utilization of precious metals, not easy to agglomerate and run off
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[0022] Example 1
[0023] A method for preparing a supported precious metal catalyst includes the following steps:
[0024] a) Use 0.0001moL / L sodium hydroxide solution to adjust the pH value of 10mL 0.005moL / L chloropalladium acid aqueous solution to neutral, dilute to 50mL with deionized water, and set aside; in a 50mL deionized water reaction vessel 2.6g of nickel foam was fixed below the surface of deionized water, the temperature of deionized water in the reaction vessel was adjusted to a stable 40℃, the reaction vessel was placed on a magnetic stirrer, and vigorous stirring was started at 800 rpm At the same time, use an electric syringe pump to add the chloropalladium acid aqueous solution to the vigorously stirred reaction system at a speed of 1 mL / min. After the dropwise addition is completed, the temperature is kept and the stirring is continued for 4 hours. After the reaction is completed, take out the prepared foamed nickel supported palladium catalyst;
[0025] b) Wash...
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[0030] Example 2
[0031] A method for preparing a supported precious metal catalyst includes the following steps:
[0032] a) Adjust the pH value of 10 mL of the mixed solution containing 0.0025moL / L potassium chloroplatinate and 0.0025moL / L potassium chloroplatinate to neutral with 0.0001moL / L hydrochloric acid solution, and use the neutral mixed solution Dilute the ionized water to 50mL for use; in a 50mL deionized water reaction vessel, fix 2.5g of foamed nickel below the level of the deionized water, and adjust the temperature of the deionized water in the reaction vessel to a stable 50°C. Place it on a magnetic stirrer and start stirring vigorously at 800 rpm. At the same time, the neutral potassium chloropalladate and potassium chloroplatinate mixed solution prepared above was added to the vigorously stirred reaction system at a rate of 1 mL / min, and the reaction was kept for 3 hours after the addition was completed. After the reaction is completed, take out the foamed nic...
Example Embodiment
[0037] Example 3
[0038] A method for preparing a supported precious metal catalyst includes the following steps:
[0039] a) Adjust 10 mL of 0.005moL / L chloropalladium acid aqueous solution to neutral with 0.0001moL / L sodium hydroxide solution, and dilute the neutral solution to 50mL with deionized water for use; In the ionized water reactor, fix 2.5 foamed cobalt below the deionized water level, adjust the temperature of the deionized water in the reactor to a stable 45℃, and place it on a magnetic stirrer, starting at 800 rpm Stir vigorously. At the same time, the neutral aqueous solution of chloropalladium acid was added to the vigorously stirred reactor at a speed of 1 mL / min, and after the addition was completed, the temperature was kept and the stirring was continued for 4 hours. After the reaction is completed, take out the foamed cobalt supported palladium catalyst.
[0040] b) The catalyst after the reaction is washed 2-3 times with a 10% ethanol solution, and finally w...
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