A method for synthesizing nanometer lanthanum molybdate as electrolyte material for solid oxide fuel cells
A technology of electrolyte materials and solid oxides, applied in fuel cells, nanotechnology for materials and surface science, chemical instruments and methods, etc., can solve problems such as difficult dry pressing or tape casting, and achieve low production costs, The effect of high yield
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Embodiment 1
[0018] Synthesis of nano-lanthanum molybdate as electrolyte material for solid oxide fuel cells:
[0019] The ammonium molybdate [(NH 4 ) 6 Mo 7 o 24 4H 2 O] and 3.031g of lanthanum nitrate [La(NO 3 ) 3 ·6H 2 O], the two were dissolved in 100mL and 35mL of distilled water respectively, and stirred to form a uniform solution with a concentration of 0.01mol / L and 0.20mol / L. After the two solutions were mixed, they were transferred to a reaction kettle with a volume of 200mL, slowly Add ammonia water dropwise (the amount added is 18:1 according to the molar ratio between the precipitating agent and lanthanum nitrate), stir vigorously for 2 hours and then seal it. Place the reaction kettle in a constant temperature blast drying oven and heat it to 250°C for 15 hours. Stop heating and let it cool naturally. to room temperature, the product was filtered, washed, and dried (50°C, 3h) to obtain lanthanum molybdate (La 2 Mo 2 o 9 ) Nanopowder.
[0020] figure 1 It is the XR...
Embodiment 2
[0023] Synthesis of nano-lanthanum molybdate as electrolyte material for solid oxide fuel cells:
[0024] The ammonium molybdate [(NH 4 ) 6 Mo 7 o 24 4H 2 O] and 15.155g of lanthanum nitrate [La(NO 3 ) 3 ·6H 2 [0], the two were dissolved in 100mL and 70mL of distilled water respectively, and stirred to form a uniform solution with a concentration of 0.05mol / L and 0.50mol / L. After the two solutions were mixed, they were transferred to a reaction kettle with a volume of 250mL, slowly Add sodium hydroxide solution dropwise (the amount added is 20:1 according to the molar ratio between the precipitating agent and lanthanum nitrate), stir vigorously for 2 hours and seal it, place the reaction kettle in a constant temperature blast drying oven and heat it to 300°C for 20 hours, then stop Heating and naturally cooling to room temperature, the product was filtered, washed, and dried (40°C, 5h) to obtain lanthanum molybdate (La molybdate) for solid oxide fuel cell electrolyte ma...
Embodiment 3
[0028] The ammonium molybdate [(NH 4 ) 6 Mo 7 o 24 4H 2 O] and 43.304g of lanthanum nitrate [La(NO 3 ) 3 ·6H 2 O], the two were dissolved in 100mL and 50mL of distilled water respectively, stirred to form a uniform solution with a concentration of 0.05mol / L and 2mol / L, and the two solutions were mixed (mixed in the form of dropping) and transferred to a volume of 200mL In the reaction kettle, slowly add urea solution dropwise (the amount added is 30:1 according to the molar ratio between the precipitating agent and lanthanum nitrate), seal it after vigorously stirring for 1 hour, and heat the reaction kettle to 200°C in a constant temperature blast drying oven Keep warm for 24 hours, stop heating and cool down to room temperature naturally, filter, wash and dry the product (30°C, 8 hours) to obtain lanthanum molybdate (La molybdate) for solid oxide fuel cell electrolyte materials 2 Mo 2 o 9 ) Nanopowder.
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