A kind of preparation method of palladium, copper composite catalyst loaded on aluminum surface
A composite catalyst and aluminum surface technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the interference of insoluble by-products, complicated preparation steps, and recovery links Inconvenience and other problems, to achieve the effect of broad industrial application prospects
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Embodiment 1
[0011] 1. Preparation of palladium and copper composite catalyst supported on aluminum surface:
[0012] Mix the xylene solution of palladium chloride, copper chloride, ammonium citrate and N,N'-diisopropylpropylenediamine, and control the concentration of palladium chloride in the mixed solution to be 1.6×10 -3 mol / L, the concentration of copper chloride in the mixture is 1.6×10 - 3 mol / L, the concentration of ammonium citrate in the mixture is 3.0×10 -4 The concentration of mol / L, N,N'-diisopropylpropylenediamine in the mixture is 4.0×10 -4 mol / L.
[0013] The above mixed solution was heated up to 100°C, kept warm, and then the aluminum foil was soaked in it. After 3 hours of reaction, the aluminum foil was taken out and washed with deionized water to obtain a sheet-shaped palladium-copper composite catalyst supported on the aluminum surface.
[0014] 2. Use the Heck coupling reaction of iodobenzene and styrene to detect the activity of the prepared catalyst:
[0015] D...
Embodiment 2
[0018] Embodiment 2: other conditions are the same as embodiment 1, the prepared catalyst activity of checking different palladium chloride concentration, experimental result is shown in table 1.
[0019] Table 1 Test of activity of catalysts prepared with different concentrations of palladium chloride
[0020]
[0021] From the above results, it can be seen that when the concentration of palladium chloride is 1.6×10 -3 mol / L, the catalyst activity was the highest (Example 1).
Embodiment 3
[0022] Embodiment 3: other conditions are the same as embodiment 1, and the catalyst activity prepared by checking different cupric chloride concentrations, the experimental results are shown in Table 2.
[0023] Table 2 Test of activity of catalysts prepared with different concentrations of copper chloride
[0024]
[0025] It can be seen from the above results that when the concentration of copper chloride is 1.6×10 -3 mol / L, the catalyst activity was the highest (Example 1).
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