Double-perovskite catalyst as well as preparation method and application thereof
A double perovskite and catalyst technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, heterogeneous catalyst chemical elements, etc., can solve the problems of low specific surface area, limited perovskite, poor characteristics, etc., to achieve High catalytic activity, excellent thermal stability, and easy handling
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Embodiment 1
[0022] Embodiment 1: The double perovskite catalyst of this embodiment is La 2 CoMnO 6 ;
[0023] A kind of preparation method of double perovskite catalyst, concrete steps are as follows:
[0024] (1) Add salt A (salt A is lanthanum nitrate), salt B (salt B is cobalt nitrate) and salt B' (salt B' is manganese nitrate) into absolute ethanol and grind until dissolved to obtain ethanol metal salt solution, The molar ratio of A salt (lanthanum nitrate), B salt (cobalt nitrate) and B' salt (manganese nitrate) is 2:1:1;
[0025] (2) Mix the ethanol metal salt solution, potassium nitrate and sodium nitrate obtained in step (1), dry and volatilize the ethanol to obtain a mixed salt; wherein A salt (lanthanum nitrate), B salt (cobalt nitrate) and B' salt (manganese nitrate ) to the total molar ratio of potassium nitrate and sodium nitrate is 1:30; the molar ratio of potassium nitrate and sodium nitrate is 1:1;
[0026] (3) The mixed salt obtained in step (2) was heated to 700°C at...
Embodiment 2
[0030] Embodiment 2: The present embodiment double perovskite catalyst is La 2 FeMnO 6 ;
[0031] A kind of preparation method of double perovskite catalyst, concrete steps are as follows:
[0032] (1) Add salt A (salt A is lanthanum nitrate), salt B (salt B is iron nitrate) and salt B' (salt B' is manganese nitrate) into absolute ethanol and grind until dissolved to obtain ethanol metal salt solution, The molar ratio of A salt (lanthanum nitrate), B salt (iron nitrate) and B' salt (manganese nitrate) is 2:1:1;
[0033] (2) Mix the ethanol metal salt solution, potassium nitrate and sodium nitrate obtained in step (1), dry and volatilize the ethanol to obtain a mixed salt; wherein A salt (lanthanum nitrate), B salt (iron nitrate) and B' salt (manganese nitrate ) to the total molar ratio of potassium nitrate and sodium nitrate is 1:30; the molar ratio of potassium nitrate and sodium nitrate is 1:1.4;
[0034] (3) The mixed salt obtained in step (2) was heated to 800°C at a c...
Embodiment 3
[0037] Embodiment 3: The double perovskite catalyst of this embodiment is La 2 NiMnO 6 ;
[0038] A kind of preparation method of double perovskite catalyst, concrete steps are as follows:
[0039] (1) Add salt A (salt A is lanthanum nitrate), salt B (salt B is nickel nitrate) and salt B' (salt B' is manganese nitrate) into absolute ethanol and grind until dissolved to obtain ethanol metal salt solution, The molar ratio of A salt (lanthanum nitrate), B salt (nickel nitrate) and B' salt (manganese nitrate) is 2:1:1;
[0040] (2) Mix the ethanol metal salt solution, potassium nitrate and sodium nitrate obtained in step (1), dry and volatilize the ethanol to obtain a mixed salt; wherein A salt (lanthanum nitrate), B salt (nickel nitrate) and B' salt (manganese nitrate ) to the total molar ratio of potassium nitrate and sodium nitrate is 1:20; the molar ratio of potassium nitrate and sodium nitrate is 1:1.5;
[0041] (3) The mixed salt obtained in step (2) was heated to 800°C ...
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