Carbon self-supported metal phosphide catalyst, and preparation method and application thereof
A metal phosphide and catalyst technology, applied in the direction of physical/chemical process catalysts, hydrocarbons, hydrocarbons, etc., can solve the problems of high cost, reduced metal bond strength, unfavorable large-scale production, etc., to prevent oxidation, strong Absorbing performance, effect of low reduction temperature
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Embodiment 1
[0024] According to the stoichiometric ratio Ni:P=1:1 (molar ratio), weigh nickel nitrate hexahydrate Ni(NO 3 ) 2 ·6H 2 O 23.264g, add 50mL distilled water, stir 0.5h, fully dissolve, obtain nickel nitrate solution; Weigh phytic acid (C 6 h 18 o 24 P 6 , content 50wt%), 17.6g was added to the nickel nitrate solution, mixed and stirred for 2 hours, and the resulting mixed solution was placed in an oven at 120°C and baked until gelatinous, and then put in a microwave oven with high heat (power 1200W ) and calcined for 3 min to obtain a catalyst precursor.
[0025] The catalyst precursor obtained above was placed in a tube furnace, and the temperature was raised from room temperature to 650°C at a rate of 5°C / min in a hydrogen atmosphere for calcination and reduction, and the calcination and reduction was carried out at 650°C for 3 hours to obtain a metal nickel phosphide catalyst. In order to prevent the metal nickel phosphide from being oxidized, the catalyst needs to be ...
Embodiment 2
[0028] According to the stoichiometric ratio Ni:P=1:2 (molar ratio), weigh nickel nitrate hexahydrate Ni(NO 3 ) 2 ·6H 2 O 23.264g, add 50mL distilled water, stir 0.5h, fully dissolve, obtain nickel nitrate solution; Weigh phytic acid (C 6 h 18 o 24 P 6 , content 50wt%) 35.2g, added to the nickel nitrate solution, mixed and stirred for 2 hours, the formed mixed solution was placed in a 120°C oven and baked until gelatinous, and then put in a microwave oven with high heat (power 1200W ) was calcined for 3 minutes to obtain a catalyst precursor;
[0029] The catalyst precursor obtained above was placed in a tube furnace, and the temperature was raised from room temperature to 650°C at a rate of 5°C / min in a hydrogen atmosphere for calcination and reduction, and the calcination and reduction was carried out at 650°C for 3 hours to obtain a metal nickel phosphide catalyst. In order to prevent the metal nickel phosphide from being oxidized, the catalyst needs to be passivated....
Embodiment 3
[0032]According to the stoichiometric ratio Ni:P=1:3 (molar ratio), weigh nickel nitrate hexahydrate Ni(NO 3 ) 2 ·6H 2 O 14.535g, add 50mL distilled water, stir 0.5h, fully dissolve, obtain nickel nitrate solution; Weigh phytic acid (C 6 h 18 o 24 P 6 , content 50wt%) 33g, added to the nickel nitrate solution, mixed and stirred for 2 hours, put the formed mixed solution in an oven at 120°C and bake until gelatinous, and then put it in a microwave oven with high heat (power 1200W) Calcining for 3min to obtain a catalyst precursor;
[0033] The catalyst precursor obtained above was placed in a tube furnace, and the temperature was raised from room temperature to 650°C at a rate of 5°C / min in a hydrogen atmosphere for calcination and reduction, and the calcination and reduction was carried out at 650°C for 3 hours to obtain a metal nickel phosphide catalyst. In order to prevent the metal nickel phosphide from being oxidized, the catalyst needs to be passivated. At the passi...
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