A carbon-coated nickel-ruthenium nanomaterial and its preparation method and application
A carbon-coated nickel and nanomaterial technology, applied in the field of preparation and application of nanomaterials, can solve the problems of reducing the catalytic activity of catalysts, and it is difficult for pure-phase materials to simultaneously realize HER and OER bifunctional catalysis, and achieve the effect of improving stability.
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[0031] The preparation method of the above-mentioned carbon-coated nickel-ruthenium nanomaterials comprises the following steps: (a) dissolving the nickel precursor and the ruthenium precursor in the oleylamine solution to obtain a mixed solution; (b) filling the container with the mixed solution Inert gas is introduced into the atmosphere, and the reaction is heated at 200-280°C. After cooling, a mixed solvent is added to wash to obtain a precipitate; (c) the precipitate is calcined in a furnace at 350-600°C for 1-60min under an atmosphere of inert gas, After cooling, the carbon-coated nickel-ruthenium nanomaterial is obtained. In step (a), the nickel precursor is at least one of nickel nitrate hexahydrate, nickel acetylacetonate, nickel chloride dihydrate, nickel acetate tetrahydrate; the ruthenium precursor is ruthenium chloride hydrate, acetylacetonate At least one of ruthenium acetonate; the inert gas is any one of helium, nitrogen, and argon. In step (a), the ratio of t...
Embodiment 1
[0036] The present embodiment provides the preparation method of carbon-coated nickel-ruthenium nanometer material, and it comprises the following steps:
[0037] (a) 100 mg of nickel nitrate hexahydrate and 50 mg of ruthenium chloride hydrate were dissolved in 20 mL of oleylamine solution, and ultrasonically dissolved for 30 minutes to obtain a mixed solution;
[0038] (b) Transfer the above mixed solution to a heating mantle, evacuate and purge three times with argon gas; raise the temperature to 250°C for 30 minutes, and naturally cool to room temperature; centrifuge the solution, and use a volume ratio of 1 / 4 After washing with ethanol / n-hexane mixed solvent for three times, add 1mL of ferric chloride ethanol solution and sonicate for 10 minutes, then continue to centrifuge and wash to obtain a precipitate;
[0039] (c) After vacuum-drying the obtained precipitate, place it in a tube furnace for calcination at 400 degrees Celsius for 10 minutes and then cool naturally to o...
Embodiment 2
[0041] This example provides a method for preparing carbon-coated nickel-ruthenium nanomaterials, which is basically the same as that in Example 1, except that after washing, it is directly calcined without etching with an ethanol solution of ferric chloride. Transmission electron microscope picture as Figure 6 As shown, the particle uniformity is poor, but the coated carbon layer can be seen.
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