NiMoO4@Co3O4 core-shell nano composite material, and preparation method and application thereof

[0036] Example 1

[0037] Weigh 0.72 g of nickel nitrate hexahydrate and 0.6 g of sodium molybdate dihydrate, dissolve them in 50 mL of deionized water, stir for 30-35 minutes with a magnetic stirrer, transfer the mixed solution to the reactor, and place the foam nickel. Set the temperature of the vacuum drying oven to 150°C and the reaction time for 3 h. After the reaction, the reactor was cooled to room temperature, and the nickel foam was taken out, washed with ethanol and deionized water respectively, and then placed in a vacuum drying oven for drying. The drying temperature was 80°C and the drying time was 6 h. Put the dried nickel foam into a high-temperature furnace and calcinate at 350℃ for 3 h, then NiMoO is obtained. 4 The sample grown on nickel foam (sample 1).

[0038] Weigh 0.5622 g of cobalt sulfate heptahydrate, 0.296 g of ammonium fluoride, and 0.6 g of urea, and dissolve the mixture in 35 mL of deionized water. Transfer the mixed solution to the reaction kettle, pl

[0046] Example 2

[0047] Weigh 0.65 g of nickel sulfate hexahydrate and 0.49 g of ammonium molybdate and dissolve them in 50 mL of deionized water. After stirring with a magnetic stirrer for 30-35 minutes, transfer the mixed solution to the reactor, and then place the carbon cloth. Set the temperature of the vacuum drying oven to 120℃, and the reaction time is 4 h. After the reaction is over, after the reaction kettle is cooled to room temperature, take out the carbon cloth, wash them with ethanol and deionized water for 2~3 times respectively, and then put them in a vacuum drying oven for drying at a drying temperature of 80℃ and a drying time of 6 hours. The carbon cloth is calcined in a high-temperature furnace at 300℃ for 3 h to obtain NiMoO 4 The sample grown on carbon cloth (sample 1).

[0048] Weigh 0.4759 g of cobalt chloride hexahydrate, 0.296 g of ammonium fluoride, and 0.6 g of urea, dissolve the mixture in 35 mL of deionized water, transfer the mixed solution to the reac

[0049] Example 3

[0050] Weigh 0.59 g of nickel chloride hexahydrate and 0.49 g of ammonium molybdate and dissolve them in 50 mL of deionized water. After stirring with a magnetic stirrer for 30-35 minutes, transfer the mixed solution to the reactor, and then place the carbon fiber paper. Set the temperature of the vacuum drying oven to 140℃, and the reaction time is 6 h. After the reaction is over, after the reaction kettle is cooled to room temperature, take out the carbon fiber paper, wash it with ethanol and deionized water for 2~3 times, and then put it in a vacuum drying oven for drying at a drying temperature of 80°C and a drying time of 6 hours. The carbon fiber paper is calcined in a high-temperature furnace at 400 ℃ for 3 h to obtain NiMoO 4 The sample grown on carbon fiber paper (sample 1).

[0051] Weigh 0.4982 g of cobalt acetate tetrahydrate, 0.296 g of ammonium fluoride, and 0.6 g of urea, dissolve the mixture in 35 mL of deionized water, transfer the mixed solution t