Layered duplex metal hydroxide composite structure electrocatalyst and preparation method
A layered hydroxide and layered bimetal technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., to achieve the effects of environmental friendliness, optimized adsorption energy, and convenient operation
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[0026] Example 1: Preparation of CoFe-LDH / NF nanosheets:
[0027] Weigh 2mmol Fe(NO 3 ) 3 ·9H 2 O, 2mmol Co(NO 3 ) 2 ·6H 2 O, 4mmol of ammonium fluoride and 10mmol of urea in a beaker, add deionized water to it, magnetically stir for 20min until it is completely dissolved, then add the resulting transparent orange-yellow solution to the polytetrafluoroethylene reactor, and add the dried nickel foam Immerse, conduct a hydrothermal reaction, react at 120°C for 6 hours; after it is naturally cooled to room temperature, take out the foamed nickel, wash with water and alcohol for 3 times, and dry to obtain CoFe-LDH / NF.
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[0028] Example 2: Preparation of CoFe-LDH / NiFe-LDH-200S / NF sample:
[0029] Take 6mmol Ni(NO 3 ) 2 ·6H 2 O and 6mmol FeSO 4 ·7H 2 Put O in a beaker, add 50 mL of deionized water to it, stir magnetically until it is completely dissolved, and obtain a homogeneous solution A for use. The electrodeposition process is realized in a three-electrode system. First, the dried CoFe-LDH / NF is used as the working electrode, and the platinum wire and silver / silver chloride electrode are used as the counter electrode and the reference electrode, respectively. At room temperature, the potential is -1.2 ~ -0.8V, solution A is used as the electrolyte, and the constant potential is deposited for 200s. After the deposition is completed, remove the foamed nickel with tweezers, then rinse it with deionized water and absolute ethanol, and dry it to obtain the CoFe-LDH / NiFe-LDH / NF composite material. The material is named CoFe-LDH / NiFe-LDH / NF-3.
Example Embodiment
[0030] Example 3: Preparation of CoFe-LDH / NiFe-LDH-50S / NF sample:
[0031] The preparation method of the electrocatalytic material is basically the same as that of Example 2, except that the constant potential deposition time is 50s. The material is named CoFe-LDH / NiFe-LDH / NF-1.
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