Magnesium-based nano composite hydrogen storage material and preparation method thereof
A hydrogen storage material, nanocomposite technology, applied in chemical instruments and methods, hydrogen, borane/diborane hydride, etc., can solve the limitations of large-scale application of magnesium-based hydrogen storage materials, hydrogen storage thermodynamics and kinetics Poor performance and other problems, to achieve the effect of improving the kinetic performance of hydrogen absorption and desorption, improving the purity, and changing the crystal structure
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example 1
[0022] Take 0.2 mol sodium borohydride and 0.1 mol magnesium chloride into the ball milling tank, under argon atmosphere, ball mill at 300r / min for 20 hours, then add 300 mL of anhydrous ether, continue ball milling for 20 hours, filter the filtrate after ball milling, and place the filtrate On a rotary evaporator, evaporate to dryness under reduced pressure, then place the product in a vacuum drying oven, and dry at 150°C for 10 hours to obtain magnesium borohydride. Take 0.01 mol of magnesium borohydride and put it into a ball milling tank. Next, use the ball milling method of positive and negative alternating ball milling for 10 hours, that is, after running for 60 seconds, pause for 15 seconds and then run in the opposite direction. After the ball milling is completed, the hexaammine magnesium borohydride is obtained. Put it into the ball milling tank and mill for 10h under argon atmosphere with positive and negative ball milling, that is, after every 60s, pause for 15s and ...
example 2
[0024] Take 0.3 mol sodium borohydride and 0.1 mol magnesium chloride into the ball milling jar, under argon atmosphere, ball mill at 400r / min for 22 hours, then add 400 mL of anhydrous ether, continue ball milling for 22 hours, filter the filtrate after ball milling, and place the filtrate On a rotary evaporator, evaporate to dryness under reduced pressure, then place the product in a vacuum drying oven and dry at 200°C for 15 hours to obtain magnesium borohydride. Take 0.01 mol of magnesium borohydride and put it in a ball milling tank. Next, the ball milling is carried out by the positive and negative alternating ball milling method for 11h, that is, after running for 90s, it will pause for 20s and then run in the opposite direction. After the ball milling is completed, the hexaammine magnesium borohydride is obtained. Put it into the ball milling tank and mill for 11h under argon atmosphere with positive and negative ball milling. That is to say, after every 90s, it will pau...
example 3
[0026] Take 0.4 mol sodium borohydride and 0.2 mol magnesium chloride into the ball milling jar, mill it at 500r / min for 24h under argon atmosphere, add 500mL anhydrous ether, continue ball milling for 24h, filter the filtrate after the milling is completed, and place the filtrate On a rotary evaporator, evaporate to dryness under reduced pressure, and then place the product in a vacuum drying box and dry at 250°C for 20 hours to obtain magnesium borohydride. Take 0.02 mol of magnesium borohydride and put it into a ball milling tank. Next, the ball milling is carried out by the positive and negative alternating ball milling method for 12h, that is, after running for 120s, it will pause for 30s and then run in the opposite direction. After the ball milling is completed, hexaammine magnesium borohydride is obtained. Put it into the ball milling tank and use the positive and negative ball milling method for 12h under argon atmosphere, that is, after running for 120s, pause for 30s ...
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