Titanium-based hydrogen storage material and method for preparing the same

Abstract

The application provides a titanium-based hydrogen storage material and a preparation method thereof, and the preparation method comprises the following steps: first, preparing a Ti-MOF material; then, configuring the Ti-MOF material into a solution, adding sodium alginate into the solution, fully stirring, then adding HCl to adjust the pH value to be acidic, collecting the precipitate through centrifugation, washing and drying the precipitate with deionized water and ethanol to obtain a Ti / C precursor; preheating the obtained Ti / C precursor, then heating to 800-900 DEG C to obtain a porous Ti / C material; adding an aqueous solution containing an iron precursor and a magnesium precursor into the obtained porous Ti / C material, stirring, collecting the suspension through centrifugation, washing several times with methanol, and then performing room temperature drying to obtain a Pre-TiFeMg precursor; heating the obtained Pre-TiFeMg precursor to 600-800 DEG C to obtain TiFeMg / C alloy particles. The application solves the technical problem that the TiFe alloy has a higher requirement for the atmosphere of the environment and is easily affected by other impurity atmospheres in the environment to lose activity.

Claims

1. A method for preparing a titanium-based hydrogen storage material, characterized in that, The preparation method includes the following steps: 2-Aminoterephthalic acid and tetrabutyl titanate were dissolved in deionized water to obtain solution 1. DMF and methanol were mixed to form solution 2. Solution 1 was added to solution 2 and stirred continuously at 80 to 120°C. After completion, the solution was cooled to room temperature, and the product was collected by centrifugation. The product was washed 3-5 times with deionized water and ethanol, respectively, to obtain Ti-MOF material. Add sodium alginate to the Ti-MOF material, stir thoroughly, then add HCl to adjust the pH to acidic. Collect the precipitate by centrifugation, wash it 3-5 times with deionized water and ethanol respectively, and finally vacuum dry it at 60 to 80°C for 4 to 12 hours to obtain the Ti / C precursor. The obtained Ti / C precursor was first preheated at 50℃-80℃ for 5 minutes, then heated to 800-900℃ and held for 30-50 minutes to obtain porous Ti / C. The whole process was carried out in a N2 atmosphere. The obtained porous Ti / C material was added to an aqueous solution containing iron and magnesium precursors, stirred, centrifuged to collect the suspension, washed several times with methanol, and then dried at room temperature to obtain the Pre-TiFeMg precursor; wherein, The mass ratio of the Ti / C material, the iron precursor, and the magnesium precursor is 50:(50-80):(60-100); The obtained Pre-TiFeMg precursor was heated to 600-800℃ to obtain TiFeMg / C alloy particles. The entire process was carried out in a N2 atmosphere.

2. The method for preparing the titanium-based hydrogen storage material according to claim 1, characterized in that, The iron precursor is ferrous chloride, ferric chloride, ferrous sulfate, or ferric nitrate.

3. The method for preparing the titanium-based hydrogen storage material according to claim 2, characterized in that, The magnesium precursor is magnesium chloride, magnesium sulfate, or magnesium nitrate.

4. A titanium-based hydrogen storage material prepared according to the preparation method of claim 1, characterized in that, The titanium-based hydrogen storage material is TiFeMg alloy nanoparticles supported on a porous carbon support.