Method for preparing noble bimetal nano catalyst granules
A nano-catalyst and bimetallic nano-technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as high equipment requirements, narrow applicable areas, complex processes, etc., to achieve high purity, The effect of wide application and simple process
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example 1
[0012] Example 1: Dissolve 5.0 mg of palladium chloride, 10.0 mg of potassium chloroplatinite, 50.0 mg of sodium bromide, and 60.0 mg of polyvinylpyrrolidone (MW 8000) in 15.0 ml of deionized water, stir well, and place in 40 ml of stainless steel After reacting at 180°C for 10 hours in a pressure reactor, the obtained precipitate was centrifuged, washed with deionized water and absolute ethanol, and dried to obtain a black powder. figure 1 It is an EDS spectrum, which shows that it only contains platinum and palladium; Guo 2 is a powder X-ray diffraction pattern, which shows that it is a pure face-centered cubic platinum-palladium bimetal; image 3 It is a transmission electron microscope image, and it can be seen that it is a well-dispersed nanoparticle with an average particle diameter (major axis) of 10.1nm.
example 2
[0013] Example 2: Dissolve 5.0 mg of palladium chloride, 5.0 mg of chloroauric acid, 50.0 mg of sodium bromide, and 60.0 mg of polyvinylpyrrolidone (MW 8000) in 15.0 ml of deionized water, stir well, and place in a 40ml stainless steel pressure-resistant reaction In the still, after reacting at 160°C for 10 hours, the obtained precipitate was centrifuged, washed with deionized water and absolute ethanol, and dried to obtain a black powder. Figure 4 It is a transmission electron microscope image, which shows that it is a well-dispersed palladium-gold nanoparticle with an average particle size of 7.2 nm.
example 3
[0014] Example 3: Dissolve 10.0 mg of potassium chloroplatinite, 5.0 mg of chloroauric acid, 50.0 mg of sodium bromide, and 30.0 mg of polyvinylpyrrolidone (MW 8000) in 15.0 ml of deionized water, stir well, and place in 40 ml of stainless steel After reacting at 180°C for 15 hours in a pressure reactor, the resulting precipitate was centrifuged, washed with deionized water and absolute ethanol, and dried to obtain a black powder, which was a well-dispersed nano-platinum particle with an average particle size of 17.4 nm.
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