A kind of in-situ vanadium-doped nickel hydroxide electrode and its preparation method and application
A nickel hydroxide, in-situ technology is applied in the field of electrocatalytic materials to achieve the effects of improving electrocatalytic performance, low temperature, and easy control of reaction conditions
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[0031] The invention provides a method for preparing an in-situ vanadium-doped nickel hydroxide electrode, comprising the following steps:
[0032] 1) Pretreatment is carried out to nickel foam; preferably, pretreatment comprises: at first nickel foam is ultrasonically cleaned in acetone solution for 5 to 15 minutes, then transferred to a concentration of 1 to 2mol / L appropriate amount of hydrochloric acid and ultrasonically cleaned for 5 to 10 minutes, Finally, alternately rinse with absolute ethanol and ultrapure water for 3 to 4 times, and vacuum dry at 30 to 40°C for 8 to 10 hours before use; preferably, the foamed nickel is cut to 1.5cm×4cm in the pretreatment;
[0033] 2) Take 0.06-0.11 mg of vanadium chloride and 0.21-0.35 mg of hexamethylenetetramine, add them into 25-30 mL of ultrapure water at the same time, stir evenly to obtain solution A; preferably, magnetic force is used for stirring Stirring, the speed of magnetic stirring is 400-600r / min, and the time is 30-40...
Embodiment 1
[0038] 1) Clean the cut foam nickel (1.5cm×4cm) ultrasonically for 5 minutes in acetone solution, then transfer it to 1mol / L hydrochloric acid and ultrasonically clean it for 10 minutes, and finally wash it three times alternately with absolute ethanol and ultrapure water respectively, Then vacuum-dry at 25°C for 8 hours before use;
[0039] 2) Take 0.06mg of vanadium chloride and 0.21mg of hexamethylenetetramine, add them to 25mL of ultrapure water at the same time, stir at room temperature at a speed of 400r / min for 40min to obtain solution A;
[0040] 3) Pour solution A into the inner liner of polyparaphenylene, then put the treated foamed nickel into the inner kettle, then install the inner liner in the outer kettle and fix it in the homogeneous reactor, and then Under the speed of 5r / min, react at 155°C for 13h, and the filling ratio is 50%;
[0041] 4) After the reaction is finished, cool down to room temperature naturally, then take out the cooled product nickel foam a...
Embodiment 2
[0045] 1) Clean the cut foam nickel (1.5cm×4cm) ultrasonically in acetone solution for 10min, then transfer it to 2mol / L hydrochloric acid for ultrasonic cleaning for 5min, and finally wash it alternately with absolute ethanol and ultrapure water 4 times respectively, Then vacuum-dry at 25°C for 9 hours before use;
[0046] 2) Take 0.07mg of vanadium chloride and 0.24mg of hexamethylenetetramine, add them into 26mL of ultrapure water at the same time, stir at room temperature at a speed of 500r / min for 35min to obtain solution A;
[0047] 3) Pour solution A into the polyparaphenylene liner, then put the treated nickel foam into the inner kettle, then install the inner liner in the outer kettle and fix it in the homogeneous reactor, and then place it in the homogeneous reactor. At a speed of 6r / min, react at 157°C for 13h, and the filling ratio is 52%;
[0048] 4) After the reaction is finished, cool down to room temperature naturally, then take out the cooled nickel foam prod...
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