A rhodium catalyst for nitrogen reduction synthesis of ammonia and its preparation method and application
A rhodium catalyst, a technology for synthesizing ammonia, applied in the directions of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of poor mass transfer active sites, and the nitrogen reduction performance needs to be further improved. Electrocatalytic nitrogen reduction performance, good catalytic selectivity and stability, the effect of maintaining stable current density
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Embodiment 1
[0031] A preparation method for a rhodium catalyst for nitrogen reduction synthesis of ammonia, comprising steps:
[0032] Weigh 3.68g of octylamine into a round-bottomed flask, place it in an ice-water bath at 0°C, and drop 1.32g of formic acid into octylamine drop by drop under constant stirring, and mix well until a white powdery solid particle is formed to obtain 5g N-octylammonium formate reducing ionic liquid.
[0033] In a 90°C oil bath, 10 mg of RhCl 3 ·3H 2 O was dissolved in the above 5g ionic liquid, and after it was completely dissolved, it was transferred to an airtight reaction kettle and subjected to ionothermal reaction at 180°C for 24 hours. After cooling to room temperature, it was washed three times with absolute ethanol and ultrapure water, and then the product was placed In a vacuum oven, dry at room temperature for 12 hours to obtain black solid powder nitrogen reduction catalyst three-dimensional rhodium particles.
[0034] The material composition of...
Embodiment 2
[0043] A preparation method for a rhodium catalyst for nitrogen reduction synthesis of ammonia, comprising steps:
[0044] Weigh 3.68g of octylamine into a round-bottomed flask, place it in an ice-water bath at 0°C, and drop 1.32g of formic acid into octylamine drop by drop under constant stirring, and mix well until a white powdery solid particle is formed to obtain 5g N-octylammonium formate reducing ionic liquid.
[0045] In a 90°C oil bath, 8 mg RhCl 3 ·3H 2 O was dissolved in the above 5g ionic liquid, and after it was completely dissolved, it was transferred to an airtight reaction kettle and subjected to ionothermal reaction at 180°C for 24 hours. After cooling to room temperature, it was washed three times with absolute ethanol and ultrapure water, and then the product was placed In a vacuum oven, dry at room temperature for 12 hours to obtain black solid powder nitrogen reduction catalyst three-dimensional rhodium particles.
Embodiment 3
[0047] A preparation method for a rhodium catalyst for nitrogen reduction synthesis of ammonia, comprising steps:
[0048] Weigh 3.68g of octylamine into a round-bottomed flask, place it in an ice-water bath at 0°C, and drop 1.32g of formic acid into octylamine drop by drop under constant stirring, and mix well until a white powdery solid particle is formed to obtain 5g N-octylammonium formate reducing ionic liquid.
[0049] In a 90°C oil bath, 10 mg of RhCl 3 ·3H 2 O was dissolved in the above 4.5g ionic liquid, and after it was completely dissolved, it was transferred to an airtight reactor, and was subjected to ionothermal reaction at 180°C for 24 hours. After cooling to room temperature, it was washed three times with absolute ethanol and ultrapure water, and then the product Place in a vacuum drying oven and dry at room temperature for 12 hours to obtain black solid powder nitrogen reduction catalyst three-dimensional rhodium particles.
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