Catalyst of hydrolytic perparing hydrogen by boron hydride and its preparation method
A borohydride and catalyst technology, applied in the field of catalysts, can solve the problems of uncontrollable hydrolysis reaction, increased catalyst cost, unsustainable reaction, etc., and achieves the effects of good catalytic effect, easy forming and low price.
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[0034] Example 1
[0035] Weigh 4.30 grams of metallic magnesium powder and 5.70 grams of metallic nickel powder (atomic ratio Mg:Ni=2~2.05:1), put them into a stainless steel ball mill tank, and add an appropriate amount of steel balls (the mass ratio of metal powder and steel balls is 1:5). ~10), ball milled in an argon atmosphere for 60 hours. Every 12 hours, the ball mill is stopped, the alloy is shoveled from the wall of the ball mill, and the ball mill is continued after crushing. The obtained sample was tested by XRD (as shown in Figure 1), and it was mainly composed of Mg 2 It is composed of Ni alloy and a small amount of metallic nickel and magnesium oxide. The SEM images of the sample are shown in Figures 3 and 4, and the size of the sample particles is about 1-10 microns.
Example Embodiment
[0036] Example 2
[0037] Weigh 0.5 g of the alloy sample prepared in Example 1 and immerse it in 10 ml of 1MCoCl 2 After 5 minutes in the solution, the reaction proceeds violently, and the Mg in the alloy will replace the cobalt ion in the solution, coating the surface of the alloy particles with metallic cobalt. At the same time, the original magnesium oxide on the surface of the alloy will generate magnesium hydroxide. The XRD image and SEM image of the sample after surface treatment are shown in Figure 2 and Figure 5 and Figure 6, respectively.
[0038] Will go through CoCl 2 After the surface-treated sample is crushed, add 10ml of 1MNaBH 4 In the -1M NaOH aqueous solution, the hydrogen in the solution is quickly released in the form of hydrogen, as shown in Figure 7.
Example Embodiment
[0039] Example 3
[0040] Weigh the CoCl in Example 2 2 0.4 g of the surface-treated sample is crushed and mixed with 0.1 g of carbon black (acetylene black), 0.1 g of 60% PTFE emulsion and a small amount of water, and then add a small amount of water to stir to form a slurry, and apply to 2×2cm 2 On the foamed nickel substrate, after vacuum drying at 60°C, it can be rolled and cut to form a flake-shaped catalyst.
[0041] Put the catalyst into 10ml 1MNaBH 4 In the -1M NaOH solution, 500 ml of hydrogen can be released in 5 minutes, and the remaining 350 ml of hydrogen can be released in about 5 minutes.
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