Improved cobalt-based catalyst and preparing method and application thereof

[0031] 6 g of glucose was dissolved in 90 mL of deionized water, and the resulting solution was ultrasonically oscillated for 30 min until the glucose was uniformly dispersed in the solution. Pour the glucose solution into a 100mL polytetrafluoroethylene liner, and place it in a reaction kettle at 170°C for 10h. After cooling to room temperature, filter with suction, alternately wash three times with deionized water and absolute ethanol, and finally vacuum-dry at 80°C for 6 hours to obtain carbon sphere powder.

[0032] Soluble cobalt salt and lanthanum salt are used as precursors, and the molar ratio of La:Co is 0:1. Add an appropriate amount of deionized water to make the solution metal ion concentration equal to 0.12mol / L, and stir to obtain a transparent mixed solution.

[0033] Add 0.05 g of carbon spheres to the resulting solution, and ultrasonically oscillate for 1 hour to disperse the carbon sphere powder evenly in the solution, then slowly add ammonia solution dropwise

[0037] This example is an example of the preparation method of the modified cobalt-based catalyst of the present invention.

[0038] 6 g of glucose was dissolved in 90 mL of deionized water, and the resulting solution was ultrasonically oscillated for 30 min until the glucose was uniformly dispersed in the solution. Pour the glucose solution into a 100mL polytetrafluoroethylene liner, and place it in a reaction kettle at 170°C for 10h. After cooling to room temperature, filter with suction, alternately wash three times with deionized water and absolute ethanol, and finally vacuum-dry at 80°C for 6 hours to obtain carbon sphere powder.

[0039] Soluble cobalt salt and lanthanum salt are used as precursors, and the molar ratio of La:Co is 1:10. Add an appropriate amount of deionized water to make the solution metal ion concentration equal to 0.12mol / L, and stir to obtain a transparent mixed solution.

[0040]Add 0.05 g of carbon spheres to the resulting solution, and ultrasonica

[0044] This example is an example of the preparation method of the modified cobalt-based catalyst of the present invention.

[0045] 6 g of glucose was dissolved in 90 mL of deionized water, and the resulting solution was ultrasonically oscillated for 30 min until the glucose was uniformly dispersed in the solution. Pour the glucose solution into a 100mL polytetrafluoroethylene liner, and place it in a reaction kettle at 170°C for 10h. After cooling to room temperature, filter with suction, alternately wash three times with deionized water and absolute ethanol, and finally vacuum-dry at 80°C for 6 hours to obtain carbon sphere powder.

[0046] Soluble cobalt salt and lanthanum salt are used as precursors, and the molar ratio of La:Co is 1:4. Add an appropriate amount of deionized water to make the solution metal ion concentration equal to 0.12mol / L, and stir to obtain a transparent mixed solution.

[0047] Add 0.05 g of carbon spheres to the resulting solution, and ultrasonica