Pt-GO-MW primary overflow body and preparation method and application of composite hydrogen storage material of Pt-GO-MW primary overflow body
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A technology for hydrogen storage materials and fluids, applied in chemical instruments and methods, hydrogen, carbon compounds, etc., can solve problems such as disappearance, poor controllability of grinding methods, and decreased overflow efficiency
Active Publication Date: 2020-07-07
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology
The milling method represented by this technology, that is, the mechanical mixing of MOF and Pt / AC, has the following technical problems: due to the poor controllability of the milling method, slight differences in the preparation parameters (such as milling method, time and intensity, carbonization and treatment temperature, etc.) will lead to the reduction or even disappearance of the hydrogen spillover effect
[0021] However, when using secondary overflow, a technical problem needs to be solved, that is, in the process of primary overflow, H atoms may recombine into H molecules, resulting in a significant drop in overflow efficiency
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Embodiment 1
[0069] A method for preparing a Pt-GO-MW primary overflow with a microwave duration of 2 minutes, the specific steps are as follows:
[0070] Step 1, the hydrothermal reaction synthesis of Pt-GO, mixed 25 mg chloroplatinic acid with 100 mg graphene oxide, and then added 2 g vitamin C as a reducing agent to obtain a mixture, which was dissolved in water and ultrasonically mixed , under the condition of 120 ℃ to carry out hydrothermal reaction, you can get Pt-GO;
[0071] Step 2, microwave pore formation of Pt-GO, put the Pt-GO obtained in step 1 in a microwave oven, microwave pore formation under the conditions of microwave power of 700w and microwave time of 2 min, and then wash and freeze-dry The Pt-GO-MW primary overflow can be obtained, and the material obtained in Example 1 is named Pt-GO-MW2.
[0072] In order to prove the decisive effect of microwave treatment on pore formation and the effect of microwave pore formation in step 2, the Pt-GO obtained in step 1 and the Pt...
Embodiment 2
[0073] In order to prove the performance of the UIO-66 / Pt-GO-MW composite hydrogen storage material of the present invention, Example 2, the preparation method of the UIO-66 / Pt-GO-MW composite hydrogen storage material is provided.
[0074] Example 2
[0075]A preparation method of UIO-66 / Pt-GO-MW composite hydrogen storage material, the specific steps are as follows: the ratio of the amount of substances is 100:100:1, 0.233 mg zirconium tetrachloride, 0.166 mg terephthalic acid and 3.8 mL of formic acid were added in 20 mL of DMF, and then the addition of Pt-GO-MW primary overflow fluid was the ratio of 5% of UIO-66 quality, adding 0.01995 mg of Pt-GO-MW obtained in Example 1, After ultrasonic mixing, hydrothermal reaction was carried out at 120°C for 24 hours to obtain a gray powder material. After filtering and washing, the gray powder material obtained above was soaked in dichloro In methane for 3 days, and replace dichloromethane every 24h to replace high-boiling DMF, th...
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Abstract
The invention provides a Pt-GO-MW primary overflow body. Pt particles are loaded on the surface of graphene oxide, the size of the Pt particles is 10-50 nm, and a large number of nano-pores with the diameter of 10-100 nm exist in the surface of the graphene oxide. The preparation method comprises the following steps of synthesizing Pt-GO through a hydrothermal reaction, and carrying out microwavepore-forming on Pt-GO. According to the microwave pore-forming method, metal particles are loaded on the surface of graphene oxide for microwave treatment, the coupling effect of microwaves and the metal particles is utilized, the metal particles are rapidly heated to achieve regional high-speed movement, and a large number of nano-pores are formed in the surface of the graphene oxide. The invention provides a preparation method of a UIO-66 / Pt-GO-MW composite hydrogen storage material. Zirconium chloride, terephthalic acid, formic acid and a Pt-GO-MW primary overflow body are subjected to hydrothermal reaction and treatment to obtain the UIO-66 / Pt-GO-MW composite hydrogen storage material. When the material is used as a hydrogen storage material, the hydrogen adsorption capacity is 0.66 wt% under the conditions that the adsorption temperature is 298 K and the pressure is 40 Bar. By improving the hydrogen overflow efficiency, the normal-temperature hydrogen storage performance of the composite hydrogen storage material is remarkably improved.
Description
technical field [0001] The invention relates to the technical field of new energy materials, in particular to a preparation method and application of a Pt-GO-MW primary overflow body and a composite hydrogen storage material thereof. [0002] technical background [0003] With the development of industry and the improvement of people's material living standards, human demand for energy is increasing. Since the energy used in recent decades mainly comes from fossil fuels (such as coal, oil, natural gas, etc.), its use will inevitably pollute the environment, and its reserves are limited, so it is urgent to find renewable green energy. As a green energy and energy carrier with abundant reserves, wide sources and high energy density, hydrogen energy is attracting widespread attention. Therefore, the development of hydrogen storage materials with high performance is one of the key issues facing the field of hydrogen storage. [0004] Metal-organic frameworks (MOFs) are a new cl...
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