Tantalum-containing tin oxide for fuel cell electrode material
A fuel cell electrode, tin oxide technology, applied in fuel cells, battery electrodes, tin oxide, etc.
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Embodiment 1～5
[0059] (1) Synthesis of tantalum-containing tin oxide particles
[0060] In this example, tantalum-containing tin oxide particles were synthesized by a wet synthesis method. Add the amount of TaCl shown in Table 1 to 50 mL of ethanol 5 , making it dissolve, and obtained 5 kinds of concentrations of tantalum-containing solutions. In addition, make Na 2 SnO 3 ·3H 2 O was dissolved in pure water to obtain a 0.33 mol / L tin-containing aqueous solution. After adding 800 mL of 0.5 mol / L nitric acid aqueous solution to each concentration of tantalum-containing solution, 600 mL of tin-containing aqueous solution was added to this solution. A precipitate was produced in solution by this addition. After the solution was allowed to stand at 25° C. for 1 hour to age the precipitate, the precipitate was recovered by filtration, and further repulping washing was performed. Next, it dried at 120 degreeC for 15 hours, and obtained the solid substance. The solid was fired in an air atmo...
Embodiment 6～9
[0074] In this example, tantalum-containing tin oxide particles were synthesized by a plasma synthesis method.
[0075] (i) Synthesis of powder for spray drying
[0076] Dissolve 100 g of TaCl in 500 mL of ethanol 5 , obtained TaCl 5 weak. On the other hand, the SnCl 4 Dissolved in pure water to obtain 6000g of 60% SnCl 4 aqueous solution. Take the amount of TaCl shown in Table 3 5 ethanol solution and 60% SnCl 4 The aqueous solution was mixed with pure water to make a mixed solution of about 1.6 L. Alternatively, pure water was added in 25% NH 3 In water, make 12.5% NH 3 Water was used as neutralizing solution. A neutralizing solution was added to the mixed solution to reach pH=7. However, the liquid temperature is maintained at about 60° C. during the neutralization reaction. After aging overnight at normal temperature, repulping washing was performed four times with pure water. Pure water was added and stirred to the filtered residue to prepare a slurry with ...
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