Porous high-entropy alloy self-supporting electrode for electrolyzing water and preparation method thereof
A self-supporting electrode, high-entropy alloy technology, applied in the field of electrolysis of water
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[0031] The invention provides a preparation method of a high-entropy alloy-based electrolysis water catalyst, comprising the following steps:
[0032] 1) Melt and mix nickel powder, cobalt powder, chromium powder, iron powder, aluminum powder, and tungsten powder (the molar ratio of which is 30:30:10:10:18:2), and form a eutectic structure (FCC) after cooling. phase +B2 phase) high entropy alloy;
[0033] 2) Use a wire cutting machine to cut from a large ingot to an area of 1 × 1 cm 2 , a square sheet with a thickness of 400 μm, which is simply polished by a grinding and polishing machine to remove the surface oxide scale, and the thickness is about 300 μm at this time;
[0034] 3) Take 30mL of 1M HCl solution and pipet it into a 50mL centrifuge tube, put 1 piece of high-entropy alloy sheet into it, soak it for 6, 12, 24, 48, 60, and 72 hours for dealloying treatment; the mass fraction of HCl solution is Anything below 20% is acceptable.
[0035] 4) After the hydrochloric...
Example Embodiment
[0037] Example 1
[0038] The ingredients and dosage of raw materials are as follows:
[0039] Nickel powder, cobalt powder, chromium powder, iron powder, aluminum powder, tungsten powder (the molar ratio is 30:30:10:10:18:2), hydrochloric acid solution (concentration is 1mol / L), potassium hydroxide solution ( The concentration is 1mol / L).
[0040] The preparation process of the high-entropy alloy-based catalyst:
[0041] The nickel powder, cobalt powder, chromium powder, iron powder, aluminum powder, and tungsten powder (the molar ratio of which is 30:30:10:10:18:2) are smelted and mixed, and after cooling, a two-phase eutectic structure (FCC) is formed. phase + B2 phase) high-entropy alloy; cut from a large ingot with an area of 1 × 1 cm using a wire cutting machine 2 , a square sheet with a thickness of 400 μm, and the surface oxide scale is simply removed by grinding and polishing machine, and the thickness is about 300 μm at this time; take 30 mL of 1M HCl corrosion ...
Example Embodiment
[0055] Example 2
[0056] The ingredients and dosage of raw materials are as follows:
[0057] Nickel powder, cobalt powder, chromium powder, iron powder, aluminum powder, tungsten powder (the molar ratio is 25:20:20:15:15:5), hydrochloric acid solution (concentration is 2mol / L), potassium hydroxide solution ( The concentration is 1mol / L).
[0058] The preparation process of the high-entropy alloy-based catalyst:
[0059] The nickel powder, cobalt powder, chromium powder, iron powder, aluminum powder, and tungsten powder (the molar ratio of which is 25:20:20:15:15:5) are smelted and mixed, and after cooling, a two-phase eutectic structure (FCC) is formed. phase + B2 phase) high-entropy alloy; cut from a large ingot with an area of 1 × 1 cm using a wire cutting machine 2 , a square sheet with a thickness of 400 μm, and the surface oxide scale is simply removed by grinding and polishing machine, and the thickness is about 300 μm at this time; take 30 mL of 2M HCl etching so...
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