Method for producing hydrogen from light-driven slurry hydrogen storage and production material and application thereof

Abstract

The invention discloses a hydrogen production method using a light-driven slurry hydrogen storage and production material and application thereof, and the hydrogen production method comprises the following steps: mixing the slurry hydrogen storage and production material with a catalyst, adding water, and carrying out a hydrogen production reaction under an illumination condition; wherein the slurry hydrogen storage and production material is composed of an organic liquid hydride and a solid, and the solid comprises at least one of a nanocrystalline metal, a coordination hydride and a metal hydride. Illumination is introduced in the hydrogen production process of the slurry hydrogen storage and production material, activation of organic liquid hydride molecules can be promoted, the reaction temperature of the slurry hydrogen storage and production material can be reduced, the hydrogen conversion rate of the slurry hydrogen storage and production material can be effectively increased, and efficient and deep hydrogen production of the slurry hydrogen storage and production material is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen storage and production, and in particular to a method for producing hydrogen using a light-driven slurry hydrogen storage and production material and applications thereof. Background Art

[0002] As a clean and pollution-free secondary energy source, hydrogen energy has the advantages of high combustion calorific value, high mass energy density, and various utilization forms. The large-scale application of hydrogen energy will have a significant impact on human society. However, the lack of safe, efficient, and reversible hydrogen storage materials with high volume energy density and corresponding hydrogen storage solutions has restricted the commercial application of hydrogen energy.

[0003] There are some patents at present, for example, CN118598073A, CN118495469A, CN118495470A, CN118598072A, CN118702058A successfully use organic liquid hydride to coat nano-microcrystalline aluminum-based powder, coordinated hydride and metal hydride to form a fluid multi-media composite slurry hydrogen storage and production material, which can not only improve the hydrogen storage density of the material and the stability of the slurry, but also use the hydrolysis exothermic characteristics of nano-microcrystalline metal powder, coordinated hydride and metal hydride to provide heat for the hydrogen production of organic liquid hydride at the liquid-solid interface, thereby realizing a continuous and controllable dual hydrogen production process of multi-media composite slurry hydrogen storage material.

[0004] However, slurry hydrogen storage and production materials composed of N-heterocyclic compounds represented by fully hydrogenated N-ethylcarbazole and fully hydrogenated N-methylindole still have the problem of low dehydrogenation efficiency. Even when the dehydrogenation temperature is 150-300°C and the catalyst content is 10%, the hydrogen production efficiency in the slurry is only about 80%. There are two reasons. First, the molecular properties of organic liquid hydrides are stable, and the energy required for molecular activation during the hydrogen production process is high. Second, multi-media composite slurry hydrogen storage and production reactions need to react with water. Water molecules and organic liquid hydride molecules will compete for adsorption on the catalyst, inhibiting the hydrogen production of organic liquid hydrides. Therefore, it is necessary to develop new and effective hydrogen production methods to achieve efficient hydrogen production from multi-media composite slurry hydrogen storage and production materials. Summary of the invention

[0005] The design concept of the present invention is that light-driven chemical reactions are different from thermochemical reactions. Photochemical reactions use light as energy to make the reactants reach their electronic excited states. The reactions are carried out on the excited state potential energy surface, which can achieve some reactions that cannot be achieved by thermochemical methods and improve the atomic economy of the reactions. Light drive is used to achieve efficient hydrogen production of slurry hydrogen storage materials and achieve deep hydrogen production.

[0006] To this end, the present invention provides a method for producing hydrogen using a light-driven slurry hydrogen storage and production material, comprising: After mixing the slurry hydrogen storage and production material with the catalyst, water is added and hydrogen production reaction is carried out under light conditions; Wherein, the slurry hydrogen storage and production material is composed of an organic liquid hydride and a solid, and the solid includes at least one of a nanocrystalline metal, a coordinated hydride, and a metal hydride; The illumination conditions are achieved by irradiation light with a wavelength of 10-700nm, a radiation power range of 10-100W, and a temperature of 80-180°C.

[0007] Furthermore, the solid is one of nanocrystalline metal, coordinated hydride, and metal hydride; In terms of mass percentage, the organic liquid hydride accounts for 50%-99% of the slurry hydrogen storage and production material, and the nano-microcrystalline metal accounts for 1%-50%.

[0008] Further, the solid is a mixture of nanocrystalline metal and metal hydride; In terms of mass percentage, the organic liquid hydride accounts for 60%-80% of the slurry hydrogen storage and production material, the nano-microcrystalline metal accounts for 1%-25%, and the metal hydride accounts for 1%-25%.

[0009] Further, the solid is a mixture of nano-microcrystalline metal and coordinated hydride; In terms of mass percentage, the organic liquid hydride accounts for 60%-90% of the slurry hydrogen storage and production material, the nano-microcrystalline metal accounts for 1%-25%, and the coordinated hydride accounts for 1%-25%.

[0010] Further, the solid is a mixture of metal hydride and coordinated hydride; In terms of mass percentage, the organic liquid hydride accounts for 60%-90% of the slurry hydrogen storage and production material, the metal hydride accounts for 1%-25%, and the coordinated hydride accounts for 1%-25%.

[0011] Further, the solid is a mixture of nanocrystalline metal, metal hydride and coordinated hydride; In terms of mass percentage, the organic liquid hydride accounts for 60%-90% of the slurry hydrogen storage and production material, the nano-microcrystalline metal accounts for 1%-25%, the metal hydride accounts for 1%-25%, and the coordinated hydride accounts for 1%-25%.

[0012] Furthermore, the mass of the catalyst is 0.01-0.2 times that of the slurry hydrogen storage and production material; The mass of the water is 1-10 times that of the slurry hydrogen storage and production material.

[0013] Further, the organic liquid hydride includes at least one of a liquid aromatic compound, a heterocyclic compound, and a full hydrogenation product of a liquid organic polyol; The nanocrystalline metal includes at least one of Group I, Group II and Group III metals; The coordinated hydride includes at least one of LiAlH4, NaAlH4, KAlH4, Mg(AlH4)2, Ca(AlH4)2, LiBH4, NaBH4, KBH4, Mg(BH4)2, and Ca(BH4)2; The metal hydride comprises at least one of LiH, KH, NaH, CuH2, and CaH2; The catalyst includes at least one of a Pd-based catalyst and a Pt-based catalyst. Preferably, a Pd-based catalyst is selected, specifically, it can be at least one of Pd / Al2O3, Pd / SiO2, Pd / molecular sieve and Pd / mesoporous carbon.

[0014] It should be noted that the specific types of organic liquid hydrides do not need to be strictly limited. For example, the full hydrogenation product of aromatic compounds can be at least one of cyclohexane, methylcyclohexane, dimethylcyclohexane, decane, and decahydronaphthalene; the full hydrogenation product of heterocyclic compounds can be at least one of the full hydrogenation products of dibenzyltoluene, N-ethylcarbazole, N-propylcarbazole, N-methylindole, N-ethylindole, quinoline and the like; the full hydrogenation product of liquid organic polyols can be at least one of methanol, ethanol and isopropanol.

[0015] Furthermore, the particle size of the nano-crystalline metal is 50-1000 nm.

[0016] The present invention also provides the application of the above-mentioned light-driven slurry hydrogen storage and production material hydrogen production method in the field of hydrogen storage and production.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention introduces light during the hydrogen production process of the slurry hydrogen storage and production material, which can promote the activation of organic liquid hydride molecules, reduce the reaction temperature of the slurry hydrogen storage and production material, effectively improve the hydrogen conversion rate of the slurry hydrogen storage and production material, and realize efficient and deep hydrogen production of the slurry hydrogen storage and production material. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1The time required for the hydrogen production reaction to reach equilibrium in the light-driven slurry hydrogen storage and production material hydrogen production method of Examples 1-5 and Comparative Examples 1-5 is shown; Figure 2 The hydrogen production conversion rates of the light-driven slurry hydrogen storage and production material hydrogen production methods of Examples 1-5 and Comparative Examples 1-5 are shown; Figure 3 The hydrogen production conversion rate of the light-driven slurry hydrogen storage and production material hydrogen production method of Examples 6-11 and the time required for the hydrogen production reaction to reach equilibrium are shown. DETAILED DESCRIPTION

[0020] The endpoints and any values ​​of the ranges disclosed in the present invention are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be regarded as specifically disclosed in the present invention.

[0021] The following will be combined with the specific embodiments of the present invention and the drawings of the specification to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1 A method for producing hydrogen from a light-driven slurry hydrogen storage material comprises the following steps: S1. Weigh the full hydrogenation product of N-methylindole (H-MID) and 100 nm aluminum powder in a mass ratio of 0.76:0.24, then transfer them to a ball mill, and ball mill to obtain a slurry hydrogen storage material; S2. The slurry hydrogen storage material and the Pd / Al2O3 catalyst are mixed and stirred at a mass ratio of 1:0.1 to obtain a reaction system, and the reaction system is transferred to a photoreactor with a heating function. The photoreactor is then evacuated and filled with nitrogen to remove the air in the photoreactor and the reaction system; S3, adding deionized water of 5 times the mass of the slurry hydrogen storage and production material to the reaction system through the reactor, and maintaining the reaction system at 150° C. and placing it under the irradiation of a light source with a wavelength of s200nm and a radiation power of 50W to carry out hydrogen production reaction; S4. Collect the gas generated at the outlet of the photoreactor using the drainage method and calculate the conversion rate of the hydrogen production reaction.

[0023] Among them, the calculation formula for the conversion rate of the hydrogen production reaction is: .

[0024] In the present invention, the catalyst type in all embodiments is Pd / Al2O3 catalyst, the mass ratio of catalyst to slurry hydrogen storage material is 1:0.1, and the amount of water used is 5 times the mass of slurry hydrogen storage material. The following embodiments and comparative examples all use the same method to calculate the conversion rate of hydrogen production reaction, which will not be repeated.

[0025] Comparative Example 1 It is basically the same as Example 1, except that there is no light source irradiation in step S3 and the temperature is 180°C.

[0026] Example 2 A method for producing hydrogen from a light-driven slurry hydrogen storage material comprises the following steps: S1. Weigh H-MID and CaH2 in a mass ratio of 0.83:0.17, then transfer them to a ball mill and mill them to obtain a slurry hydrogen storage and production material; S2. The slurry hydrogen storage material and the Pd / Al2O3 catalyst are mixed and stirred at a mass ratio of 1:0.1 to obtain a reaction system, and the reaction system is transferred to a photoreactor with a heating function. The photoreactor is then evacuated and filled with nitrogen to remove the air in the photoreactor and the reaction system; S3, adding deionized water of 5 times the mass of the slurry hydrogen storage and production material to the reaction system through the reactor, and maintaining the reaction system at 140° C. and placing it under the irradiation of a light source with a wavelength of 300 nm and a radiation power of 100 W to carry out hydrogen production reaction; S4. Collect the gas generated at the outlet of the photoreactor using the drainage method and calculate the conversion rate of the hydrogen production reaction.

[0027] Comparative Example 2 It is basically the same as Example 2, except that there is no light source irradiation in step S3 and the temperature is 160°C.

[0028] Example 3 S1. Weigh H-MID and NaBH4 in a mass ratio of 0.99:0.01, then transfer them to a ball mill, and ball mill to obtain a slurry hydrogen storage and production material; S2. The slurry hydrogen storage material and the Pd / Al2O3 catalyst are mixed and stirred at a mass ratio of 1:0.1 to obtain a reaction system, and the reaction system is transferred to a photoreactor with a heating function. The photoreactor is then evacuated and filled with nitrogen to remove the air in the photoreactor and the reaction system; S3, adding deionized water of 5 times the mass of the slurry hydrogen storage and production material to the reaction system through the reactor, and maintaining the reaction system at 130° C. and placing it under the irradiation of a light source with a wavelength of 300 nm and a radiation power of 80 W to carry out hydrogen production reaction; S4. Collect the gas generated at the outlet of the photoreactor using the drainage method and calculate the conversion rate of the hydrogen production reaction.

[0029] Comparative Example 3 It is basically the same as Example 3, except that there is no light source irradiation in step S3 and the temperature is 160°C.

[0030] Example 4 S1. Weigh the full hydride of N-ethylindole (H-NE-MID), 400 nm aluminum powder, and KH in a mass ratio of 0.8:0.15:0.05, then transfer them to a ball mill, and ball mill them to obtain a slurry hydrogen storage and production material; S2. The slurry hydrogen storage material and the Pd / Al2O3 catalyst are mixed and stirred at a mass ratio of 1:0.1 to obtain a reaction system, and the reaction system is transferred to a photoreactor with a heating function. The photoreactor is then evacuated and filled with nitrogen to remove the air in the photoreactor and the reaction system; S3, adding deionized water of 5 times the mass of the slurry hydrogen storage and production material to the reaction system through the reactor, and maintaining the reaction system at 140° C. and placing it under the irradiation of a light source with a wavelength of 150 nm and a radiation power of 60 W to carry out hydrogen production reaction; S4. Collect the gas generated at the outlet of the photoreactor using the drainage method and calculate the conversion rate of the hydrogen production reaction.

[0031] Comparative Example 4 It is basically the same as Example 4, except that there is no light source irradiation in step S4 and the temperature is 180°C.

[0032] Example 5 S1. Weigh H-MID, 1000nm aluminum powder and NaBH4 in a mass ratio of 0.54:0.3:0.16, then transfer them to a ball mill and ball mill to obtain a slurry hydrogen storage material; S2. The slurry hydrogen storage material and the Pd / Al2O3 catalyst are mixed and stirred at a mass ratio of 1:0.1 to obtain a reaction system, and the reaction system is transferred to a photoreactor with a heating function. The photoreactor is then evacuated and filled with nitrogen to remove the air in the photoreactor and the reaction system; S3, adding deionized water of 5 times the mass of the slurry hydrogen storage and production material to the reaction system through the reactor, and maintaining the reaction system at 140° C. and placing it under the irradiation of a light source with a wavelength of 100 nm and a radiation power of 60 W to carry out hydrogen production reaction; S4. Collect the gas generated at the outlet of the photoreactor using the drainage method and calculate the conversion rate of the hydrogen production reaction.

[0033] Comparative Example 5 It is basically the same as Example 5, except that there is no light source irradiation in step S4 and the temperature is 180°C.

[0034] Example 6 S1. Weigh the full hydride of N-ethylcarbazole (H-NECZ) and 400 nm aluminum powder in a mass ratio of 0.7:0.3, then transfer them to a ball mill, and ball mill them to obtain a slurry hydrogen storage material; S2. The slurry hydrogen storage material and the Pd / Al2O3 catalyst are mixed and stirred at a mass ratio of 1:0.1 to obtain a reaction system, and the reaction system is transferred to a photoreactor with a heating function. The photoreactor is then evacuated and filled with nitrogen to remove the air in the photoreactor and the reaction system; S3, adding deionized water of 5 times the mass of the slurry hydrogen storage and production material to the reaction system through the reactor, and maintaining the reaction system at 150° C. and placing it under the irradiation of a light source with a wavelength of 250 nm and a radiation power of 40 W to carry out hydrogen production reaction; S4. Collect the gas generated at the outlet of the photoreactor using the drainage method and calculate the conversion rate of the hydrogen production reaction.

[0035] Example 7 S1. Weigh the full hydride of N-propylcarbazole (H-NPCZ) and CaH2 in a mass ratio of 0.8:0.2, then transfer them to a ball mill, and ball mill them to obtain a slurry hydrogen storage and production material; S2. The slurry hydrogen storage material and the Pd / Al2O3 catalyst are mixed and stirred at a mass ratio of 1:0.1 to obtain a reaction system, and the reaction system is transferred to a photoreactor with a heating function. The photoreactor is then evacuated and filled with nitrogen to remove the air in the photoreactor and the reaction system; S3, adding deionized water of 5 times the mass of the slurry hydrogen storage and production material to the reaction system through the reactor, and maintaining the reaction system at 140° C. and placing it under the irradiation of a light source with a wavelength of 300 nm and a radiation power of 40 W to carry out hydrogen production reaction; S4. Collect the gas generated at the outlet of the photoreactor using the drainage method and calculate the conversion rate of the hydrogen production reaction.

[0036] Example 8 S1. Weigh H-NECZ and NaBH4 in a mass ratio of 0.9:0.1, then transfer them to a ball mill, and ball mill to obtain a slurry hydrogen storage and production material; S2. The slurry hydrogen storage material and the Pd / Al2O3 catalyst are mixed and stirred at a mass ratio of 1:0.1 to obtain a reaction system, and the reaction system is transferred to a photoreactor with a heating function. The photoreactor is then evacuated and filled with nitrogen to remove the air in the photoreactor and the reaction system; S3, adding deionized water of 5 times the mass of the slurry hydrogen storage and production material to the reaction system through the reactor, and maintaining the reaction system at 130° C. and placing it under the irradiation of a light source with a wavelength of 300 nm and a radiation power of 30 W to carry out hydrogen production reaction; S4. Collect the gas generated at the outlet of the photoreactor using the drainage method and calculate the conversion rate of the hydrogen production reaction.

[0037] Example 9 S1. Weigh H-NPCZ, 400nm aluminum powder and KH in a mass ratio of 0.6:0.25:0.15, then transfer them to a ball mill and ball mill to obtain a slurry hydrogen storage material; S2. The slurry hydrogen storage material and the Pd / Al2O3 catalyst are mixed and stirred at a mass ratio of 1:0.1 to obtain a reaction system, and the reaction system is transferred to a photoreactor with a heating function. The photoreactor is then evacuated and filled with nitrogen to remove the air in the photoreactor and the reaction system; S3, adding deionized water of 5 times the mass of the slurry hydrogen storage and production material to the reaction system through the reactor, and maintaining the reaction system at 140° C. and placing it under the irradiation of a light source with a wavelength of 275 nm and a radiation power of 30 W to carry out hydrogen production reaction; S4. Collect the gas generated at the outlet of the photoreactor using the drainage method and calculate the conversion rate of the hydrogen production reaction.

[0038] Example 10 S1. Weigh the full hydrogenation of dibenzyltoluene (H-DBT), 400nm aluminum powder, and NaBH4 in a mass ratio of 0.5:0.3:0.2, then transfer them to a ball mill, and ball mill them to obtain a slurry hydrogen storage material; S2. The slurry hydrogen storage material and the Pd / Al2O3 catalyst are mixed and stirred at a mass ratio of 1:0.1 to obtain a reaction system, and the reaction system is transferred to a photoreactor with a heating function. The photoreactor is then evacuated and filled with nitrogen to remove the air in the photoreactor and the reaction system; S3, adding deionized water of 5 times the mass of the slurry hydrogen storage and production material to the reaction system through the reactor, and maintaining the reaction system at 150° C. and placing it under the irradiation of a light source with a wavelength of 250 nm and a radiation power of 100 W to carry out hydrogen production reaction; S4. Collect the gas generated at the outlet of the photoreactor using the drainage method and calculate the conversion rate of the hydrogen production reaction.

[0039] Embodiment 11 S1. Weigh H-MID, 100 nm aluminum powder, KH, and NaBH4 in a mass ratio of 0.8:0.07:0.07:0.06, then transfer them to a ball mill, and ball mill to obtain a slurry hydrogen storage material; S2. The slurry hydrogen storage material and the Pd / Al2O3 catalyst are mixed and stirred at a mass ratio of 1:0.1 to obtain a reaction system, and the reaction system is transferred to a photoreactor with a heating function. The photoreactor is then evacuated and filled with nitrogen to remove the air in the photoreactor and the reaction system; S3, adding deionized water of 5 times the mass of the slurry hydrogen storage and production material to the reaction system through the reactor, and maintaining the reaction system at 140° C. and placing it under the irradiation of a light source with a wavelength of 400 nm and a radiation power of 70 W to carry out hydrogen production reaction; S4. Collect the gas generated at the outlet of the photoreactor using the drainage method and calculate the conversion rate of the hydrogen production reaction.

[0040] Table 1 summarizes the composition information of the slurry hydrogen storage and production materials used in the above examples and comparative examples.

[0041] Table 1 Composition information of slurry hydrogen storage and production materials

[0042] Table 2 summarizes the theoretical hydrogen release of organic liquid hydrides and the theoretical hydrogen release of nano-Al powder and NaBH4 by hydrolysis, and calculates the theoretical hydrogen release of slurry hydrogen storage and production materials based on the specific proportions in the examples and comparative examples.

[0043] Table 2 Theoretical hydrogen release information

[0044] Table 3 gives the hydrogen production parameters and performance of the embodiments and comparative examples.

[0045] Table 3 Hydrogen production parameters and performance

[0046] Based on the hydrogen release data of Example 1 and Comparative Example 1, Example 2 and Comparative Example 2, Example 3 and Comparative Example 3, Example 4 and Comparative Example 4, and Example 5 and Comparative Example 5 in Table 3, and Figure 1 and Figure 2 It can be found that under the irradiation of light of a specific wavelength, the same slurry hydrogen storage material not only significantly reduces the temperature of the hydrogen production reaction, but also significantly improves the hydrogen production conversion rate, and the time required to reach equilibrium is also significantly shortened. This is because the specific wavelength of light promotes the activation of organic liquid hydride molecules, reduces the reaction temperature of the slurry hydrogen storage material, and realizes the efficient and deep hydrogen production of the slurry hydrogen storage material.

[0047] According to the data in Table 3, the conversion rate under illumination conditions exceeds 90%, and the reaction time is significantly shortened. In contrast, under no-light conditions, when using the same catalyst and the same reaction system, the conversion rate is usually between 60% and 80%, and the reaction time usually takes more than 24 hours to achieve a similar conversion rate. These results further verify the significant promoting effect of illumination on the hydrogen production reaction, and also illustrate that the light-driven slurry hydrogen storage and production material hydrogen production method provided by the present invention has good universality and application prospects in slurry hydrogen storage and production materials with different nitrogen heterocyclic rings, aromatic rings and other structures.

[0048] In addition to using nanocrystalline metals, materials such as 200nm Mg powder and 200nm K powder can also be used as components of slurry hydrogen storage and production materials. Experimental results show that under the irradiation of light with a wavelength of 10-700nm, these alternative materials can also improve the hydrogen production conversion rate and significantly shorten the reaction time required to reach equilibrium. In addition, other metal powders (such as Ni, Cu), metal oxides, metal hydrides and coordinated hydrides can also be used as alternative hydrogen storage materials, which further proves the diversity and universality of the material selection of the light-driven slurry hydrogen storage and production material hydrogen production method of the present invention, which can be applied to different types of reaction systems and show broad application prospects.

[0049] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for producing hydrogen using a light-driven slurry hydrogen storage material, characterized in that: include, After mixing the slurry hydrogen storage and production material with the catalyst, water is added and hydrogen production reaction is carried out under light conditions; Wherein, the slurry hydrogen storage and production material is composed of an organic liquid hydride and a solid, and the solid includes at least one of a nanocrystalline metal, a coordinated hydride, and a metal hydride; The illumination conditions are achieved by irradiation light with a wavelength of 10-700nm, a radiation power range of 10-100W, and a temperature of 80-180°C.

2. The method for producing hydrogen using a light-driven slurry hydrogen storage material according to claim 1, characterized in that: The solid is one of nanocrystalline metal, coordinated hydride, and metal hydride; In terms of mass percentage, the organic liquid hydride accounts for 50%-99% of the slurry hydrogen storage and production material, and the solid accounts for 1%-50%.

3. The method for producing hydrogen using a light-driven slurry hydrogen storage material according to claim 2, characterized in that: The solid is a mixture of nano-crystalline metal and metal hydride; In terms of mass percentage, the organic liquid hydride accounts for 60%-80% of the slurry hydrogen storage and production material, the nano-microcrystalline metal accounts for 1%-25%, and the metal hydride accounts for 1%-25%.

4. The method for producing hydrogen using a light-driven slurry hydrogen storage material according to claim 2, characterized in that: The solid is a mixture of nano-crystalline metal and coordinated hydride; In terms of mass percentage, the organic liquid hydride accounts for 60%-90% of the slurry hydrogen storage and production material, the nano-microcrystalline metal accounts for 1%-25%, and the coordinated hydride accounts for 1%-25%.

5. The method for producing hydrogen using a light-driven slurry hydrogen storage material according to claim 2, characterized in that: The solid is a mixture of metal hydride and coordinated hydride; In terms of mass percentage, the organic liquid hydride accounts for 60%-90% of the slurry hydrogen storage and production material, the metal hydride accounts for 1%-25%, and the coordinated hydride accounts for 1%-25%.

6. The method for producing hydrogen using a light-driven slurry hydrogen storage material according to claim 2, characterized in that: The solid is a mixture of nanocrystalline metal, metal hydride and coordinated hydride; In terms of mass percentage, the organic liquid hydride accounts for 60%-90% of the slurry hydrogen storage and production material, the nano-microcrystalline metal accounts for 1%-25%, the metal hydride accounts for 1%-25%, and the coordinated hydride accounts for 1%-25%.

7. The method for producing hydrogen using a light-driven slurry hydrogen storage material according to any one of claims 2 to 6, characterized in that: The mass of the catalyst is 0.01-0.2 times that of the slurry hydrogen storage and production material; The mass of the water is 1-10 times that of the slurry hydrogen storage and production material.

8. The method for producing hydrogen using a light-driven slurry hydrogen storage material according to claim 1, characterized in that: The organic liquid hydride comprises at least one of a liquid aromatic compound, a heterocyclic compound, and a full hydrogenation product of a liquid organic polyol; The nanocrystalline metal includes at least one of Group I, Group II and Group III metals; The coordinated hydride includes at least one of LiAlH4, NaAlH4, KAlH4, Mg(AlH4)2, Ca(AlH4)2, LiBH4, NaBH4, KBH4, Mg(BH4)2, and Ca(BH4)2; The metal hydride comprises at least one of LiH, KH, NaH, CuH2, and CaH2; The catalyst includes at least one of a Pd-based catalyst and a Pt-based catalyst.

9. The method for producing hydrogen using a light-driven slurry hydrogen storage material according to claim 8, characterized in that: The particle size of the nano-microcrystalline metal is 50-1000nm.

10. Application of the method for producing hydrogen using a light-driven slurry hydrogen storage material as claimed in any one of claims 1 to 9 in the field of hydrogen storage and production.

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