Al-Ni nanocrystalline porous material prepared from aluminum-based alloys and preparation method and application thereof
A technology of aluminum-based alloys and porous materials, which is applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, electrodes, etc., can solve the limitations of anode catalyst activity and cost, and the large-scale application and limitation of direct hydrogen energy. Commercial application of Pt and its alloy catalysts, expensive and other problems, to achieve stable surface structure and chemical properties, promote hydrogen evolution performance, and promote the effect of improving
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Embodiment 1
[0025] Prepare the preparation method of Al-Ni nanocrystalline porous material with aluminum base alloy, carry out according to the following steps:
[0026] Step 1, preparing Al-Ni raw alloy strips according to the following components and atomic percentages: the content of Al is 85%-95%, and the content of Ni is 5%-15%;
[0027] Step 2, cutting the Al-Ni original alloy strip obtained in step 1 into a strip with a thickness of 10 μm-30 μm, a width of 2 mm, and a length of 2 cm; Wash and air dry for later use;
[0028] Step 3, take the Al-Ni alloy strip prepared in step 2 and 100ml of potassium hydroxide solution with a molar concentration of 0.8M-1.2M and place them in an electrolytic cell for electrochemical reaction, and the dealloying potential is -0.55V ~-0.65V, the reaction time is 10min, the sample prepared after the reaction is rinsed with deionized water, and dried in the air to obtain an Al-Ni nanocrystalline porous material prepared from an aluminum-based alloy.
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Embodiment 2
[0031] Prepare the preparation method of Al-Ni nanocrystalline porous material with aluminum base alloy, carry out according to the following steps:
[0032] Step 1, preparing Al-Ni raw alloy strips according to the following components and atomic percentages: the content of Al is 85%-95%, and the content of Ni is 5%-15%;
[0033] Step 2, cutting the Al-Ni original alloy strip obtained in step 1 into strips with a thickness of 10-30 μm, a width of 1 mm, and a length of 1 cm; Wash and air dry for later use;
[0034]Step 3, take the Al-Ni alloy strip prepared in step 2 and 100ml of potassium hydroxide solution with a molar concentration of 0.6M-1.0M and place them in an electrolytic cell for electrochemical reaction, and the dealloying potential is -0.50V ~-0.60V, the reaction time is 18min, the sample prepared after the reaction is rinsed with deionized water, and dried in the air to obtain an Al-Ni nanocrystalline porous material prepared from an aluminum-based alloy.
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Embodiment 3
[0037] Prepare the preparation method of Al-Ni nanocrystalline porous material with aluminum base alloy, carry out according to the following steps:
[0038] Step 1, preparing Al-Ni raw alloy strips according to the following components and atomic percentages: the content of Al is 75%-85%, and the content of Ni is 15%-25%;
[0039] Step 2, cutting the Al-Ni original alloy strip obtained in step 1 into strips with a thickness of 8-25 μm, a width of 3 mm, and a length of 3 cm; Wash and air dry for later use;
[0040] Step 3, take the Al-Ni alloy strip prepared in step 2 and 100ml of potassium hydroxide solution with a molar concentration of 0.8M-1.5M and place it in an electrolytic cell for electrochemical reaction, and the dealloying potential is -0.55V ~-0.70V, the reaction time is 8min, the sample prepared after the reaction is rinsed with deionized water, and dried in the air to obtain an Al-Ni nanocrystalline porous material prepared from an aluminum-based alloy.
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