A-site doping type double-perovskite catalyst as well as preparation method and application thereof
A double perovskite, doped technology, applied in chemical instruments and methods, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., can solve the problem of limited perovskite, low specific surface area, poor characteristics, etc. problems, to achieve the effects of excellent thermal stability, high catalytic activity, and easy operation
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Embodiment 1
[0022] Example 1: In this example, the A-site doped double perovskite catalyst is La 1.5 Ba 0.5 CoMnO 6 ;
[0023] The preparation method of the A-site doped double perovskite catalyst, the specific steps are as follows:
[0024] (1) Add A salt (A salt is lanthanum nitrate), A' salt (A' salt is barium nitrate), B salt (B salt is cobalt nitrate) and B' salt (B' salt is manganese nitrate) Grinding in water and ethanol until dissolved to obtain ethanol metal salt solution, wherein the molar ratio of A salt (lanthanum nitrate), A' salt (barium nitrate), B salt (cobalt nitrate) and B' salt (manganese nitrate) is 1.5:0.5: 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), A' salt (barium nitrate), B salt (cobalt nitrate ) and B' salt (manganese nitrate) to the total molar ratio of potassium nitrate and sodium nitrate is 1:30; ...
Embodiment 2
[0030] Example 2: In this example, the A-site doped double perovskite catalyst is La 1.9 Ba 0.1 CoMnO 6 ;
[0031] The preparation method of the A-site doped double perovskite catalyst, the specific steps are as follows:
[0032] (1) Add A salt (A salt is lanthanum nitrate), A' salt (A' salt is barium nitrate), B salt (B salt is cobalt nitrate) and B' salt (B' salt is manganese nitrate) Grinding in water and ethanol until dissolved to obtain ethanol metal salt solution, wherein the molar ratio of A salt (lanthanum nitrate), A' salt (barium nitrate), B salt (cobalt nitrate) and B' salt (manganese nitrate) is 1.9:0.1: 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), A' salt (barium nitrate), B salt (cobalt nitrate ) and B' salt (manganese nitrate) to the total molar ratio of potassium nitrate and sodium nitrate is 1:30; ...
Embodiment 3
[0037] Example 3: In this example, the A-site doped double perovskite catalyst is La 1.75 Ba 0.25 CoMnO 6 ;
[0038] The preparation method of the A-site doped double perovskite catalyst, the specific steps are as follows:
[0039] (1) Add A salt (A salt is lanthanum nitrate), A' salt (A' salt is barium nitrate), B salt (B salt is cobalt nitrate) and B' salt (B' salt is manganese nitrate) Grinding in water and ethanol until dissolved to obtain ethanol metal salt solution, wherein the molar ratio of A salt (lanthanum nitrate), A' salt (barium nitrate), B salt (cobalt nitrate) and B' salt (manganese nitrate) is 1.75:0.25: 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), A' salt (barium nitrate), B salt (cobalt nitrate ) and B' salt (manganese nitrate) to the total molar ratio of potassium nitrate and sodium nitrate is 1:...
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