Ruthenium-based catalyst as well as preparation method and application thereof
A ruthenium-based catalyst and catalyst technology, applied in the preparation of amino compounds, chemical instruments and methods, and the preparation of organic compounds, can solve the problems of dependence on alkaline additives, harsh reaction conditions, and easy deactivation, and achieve easy industrialization Application, high selectivity, and the effect of less by-product formation
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[0024] As another aspect of the present invention, also provide a kind of preparation method as above-mentioned ruthenium-based catalyst, this preparation method comprises the steps:
[0025] Step 1: impregnating carbon nitride with an aqueous solution containing a ruthenium source to obtain a catalyst precursor mixed suspension;
[0026] Step 2: adding a reducing agent to the mixed suspension of the catalyst precursor, and performing a reduction and activation reaction on the ruthenium ions supported on the carbon nitride to obtain a ruthenium-based catalyst.
[0027] In some embodiments of the present invention, in step 1, the ruthenium source includes a water-soluble ruthenium salt;
[0028] Wherein the source of ruthenium can be but not limited to ruthenium trichloride;
[0029] Wherein the concentration of the ruthenium source in the aqueous solution containing the ruthenium source is 0.1 g / L-10 g / L.
[0030] In some embodiments of the present invention, in step 1, the ...
Embodiment 1
[0038] The ruthenium-based catalyst supported by carbon nitride is prepared by impregnation method, and the specific operation steps are as follows:
[0039] (1) At room temperature, put 55 g of urea in a crucible with a lid, place it in a muffle furnace for calcination at 600°C for 4 hours, rinse it with deionized water and ethanol three times, and dry it in an oven at 80°C overnight.
[0040] (2) 0.2gRuCl 3 Dissolve in 100mL deionized water, add 1.9g of carbon nitride obtained in step (1) under stirring, continue stirring for 10min, and ultrasonically immerse for 30min to obtain a mixed suspension;
[0041] (3) Add 0.22 g of sodium borohydride to the mixed suspension obtained in step (2), continue ultrasonication for 30 min, take it out, and stir for 12 h.
[0042] (4) Centrifuge the suspension described in step (3), wash and filter the obtained precipitate with deionized water and ethanol, and dry at 100° C. for 12 hours to obtain a solid catalyst.
[0043] Performance te...
Embodiment 2
[0047] This example adopts the preparation method of the ruthenium-based catalyst in Example 1, the difference is that the carbon nitride precursor urea is replaced by melamine in the catalyst preparation step (1), and other conditions are exactly the same as those in Example 1.
[0048] The performance test conditions of the catalyst obtained in this embodiment are exactly the same as those in Example 1.
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