Preparation method and product of a banded vanadium carbide electrocatalyst
An electrocatalyst and vanadium carbide technology, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, electrodes, etc., can solve the problems of complex process and few applications in the field of electrocatalysis, and achieve high sample stability and inhibit agglomeration phenomenon Effect
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Embodiment 1
[0022] Step 1: Dissolve 5g of glucose in 65mL of deionized water, and transfer the obtained solution to a 100mL hydrothermal kettle for hydrothermal reaction. The reaction temperature is 190°C, the reaction time is 18h, centrifuged, washed with water and ethanol alternately for a total of six times , dried at 60°C for 6h to obtain the precursor;
[0023] Step 2: Take 3g of the precursor prepared in step 1 and 3g of ammonium metavanadate (mass ratio 1:1) in a porcelain boat, and react in a tube furnace under an argon atmosphere. The temperature range is 700°C, and the holding time is for 2 hours, and the heating rate was 5°C / min to obtain ribbon-shaped vanadium carbide powder.
Embodiment 2
[0025] Step 1: Dissolve 5g of glucose in 65mL of deionized water, and transfer the obtained solution to a 100mL hydrothermal kettle for hydrothermal reaction. The reaction temperature is 180°C, and the reaction time is 22h. Centrifuge, wash with water and wash with alcohol alternately for a total of six times , dried at 60°C for 8h to obtain the precursor;
[0026] Step 2: Take 3g of the precursor prepared in step 1 and 1.5g of ammonium metavanadate (mass ratio: 2:1) in a porcelain boat, and react in a tube furnace under a vacuum atmosphere. The temperature range is 900°C, and the holding time is for 4 hours, and the heating rate was 8°C / min to obtain ribbon-shaped vanadium carbide powder.
[0027] figure 1 It is the XRD spectrum of the vanadium carbide powder prepared in this example. It can be seen from the figure that the standard PDF card number corresponding to the sample is 73-0476, and the four diffraction peaks correspond to the crystal planes (111), (200), ( 220) an...
Embodiment 3
[0029] Step 1: Dissolve 6g of glucose in 65mL of deionized water, and transfer the obtained solution to a 100mL hydrothermal kettle for hydrothermal reaction. The reaction temperature is 190°C, the reaction time is 24h, centrifuged, washed with water and methanol alternately six times , dried at 60°C for 10 hours to obtain the precursor;
[0030] Step 2: Take 3g of the precursor prepared in step 1 and 1g of ammonium metavanadate (mass ratio 3:1) in a porcelain boat, and react in a tube furnace under an argon atmosphere. The temperature range is 800°C, and the holding time is for 3 hours, and the heating rate was 6°C / min to obtain ribbon-shaped vanadium carbide powder.
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