CN112126949B - Thermal shock preparation method and application of multi-principal-element alloy nanoparticles - Google Patents
Thermal shock preparation method and application of multi-principal-element alloy nanoparticles Download PDFInfo
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- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/0005—Reversible uptake of hydrogen by an appropriate medium, i.e. based on physical or chemical sorption phenomena or on reversible chemical reactions, e.g. for hydrogen storage purposes ; Reversible gettering of hydrogen; Reversible uptake of hydrogen by electrodes
- C01B3/001—Reversible uptake of hydrogen by an appropriate medium, i.e. based on physical or chemical sorption phenomena or on reversible chemical reactions, e.g. for hydrogen storage purposes ; Reversible gettering of hydrogen; Reversible uptake of hydrogen by electrodes characterised by the uptaking medium; Treatment thereof
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- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y02E60/32—Hydrogen storage
Abstract
The invention discloses a thermal shock preparation method of multi-principal-element alloy nanoparticles. The prepared nano-particle alloy component is TiaZrbHfcModNbe(a is more than or equal to 5 and less than or equal to 55, b is more than or equal to 10 and less than or equal to 65, c is more than or equal to 0 and less than or equal to 20, d is more than or equal to 0 and less than or equal to 20, e is more than or equal to 0 and less than or equal to 65, and a + b + c + d + e is 100), the statistical average particle size of the nanoparticles is between 18 and 89nm, and the particle size can be regulated and controlled through the thermal shock time. The preparation process is as follows: preparing raw materials, mixing a solution, preparing a thermal oscillation substrate, performing thermal oscillation, and finally separating the graphene with the multi-principal-element alloy nanoparticles from the carbon fiber strips by using an ultrasonic cleaning instrument. The invention also discloses a thermal shock preparation method or application of the multi-principal-element alloy nano-particles, the multi-principal-element alloy nano-particles prepared by the invention have special hydrogen storage characteristics, and the nano-alloy particles have a certain application prospect in the field of hydrogen storage materials.
Description
Technical Field
The invention relates to the technical field of nano material preparation, in particular to a thermal shock preparation method of multi-principal-element alloy nano particles.
Background
Compared with the traditional material, the nano material has some special effects (such as quantum size effect, small size effect, interface effect and macroscopic quantum tunneling effect), and the reaction kinetics performance of the prepared nano material can be obviously improved based on the large specific surface area and the nano size effect, so that the nano material has important application value in the aspect of accelerating the reaction rate. Hydrogen is the preferred carrier for future zero-carbon economy, and among many hydrogen storage technologies, solid-state hydrogen storage has unique advantages in hydrogen storage density and safety. The multi-principal element hydrogen storage alloy can meet different hydrogen storage application backgrounds due to the characteristics of wide element diversity and element proportion adjustment. The lattice distortion effect caused by the element composition difference in the multi-principal element hydrogen storage alloy can provide more lattice gap positions for hydrogen atoms, thereby increasing the hydrogen storage capacity. Therefore, the multi-principal element alloy may have more excellent hydrogen storage performance than the conventional alloy. At present, TiVZrNbHf, TiZrNbMoV and CoFeMnTi have been developedxVyZrzTiZrNbHf and other multi-main-element hydrogen storage alloys with maximum hydrogen storage density as high as 10.36 atomic density (10)22/cm3)。
The multi-principal element alloy has excellent performance in the aspect of hydrogen storage capacity, the nanocrystallization of the multi-principal element hydrogen storage alloy is an effective way for improving the hydrogen storage dynamic performance of the multi-principal element hydrogen storage alloy, and researches show that Pd nanoparticles have better hydrogen storage dynamic performance than bulk bodies, so that the multi-principal element hydrogen storage alloy nanoparticles have important application value in the field of solid hydrogen storage materials. However, the existing multi-principal element hydrogen storage alloy has the defect of poor hydrogen storage dynamic performance, and is mainly reflected in the following two aspects: the traditional multi-principal element hydrogen storage alloy is in the form of a block or powder, and the alloy particles prepared by the block have larger size and the size is in the micron order; the hydrogen storage alloy of the multi-principal element alloy has complex components, and the problems that the precipitation of intermetallic compounds is difficult to avoid and the prepared particle elements and the size distribution are not uniform when the traditional nano particle preparation technology is applied to the preparation of the multi-principal element alloy nano particles by a gas phase method, a liquid phase method or a solid phase method.
Disclosure of Invention
In view of the above, the present invention aims to provide a thermal shock preparation method for multi-host alloy nanoparticles and an application thereof, where the multi-host alloy nanoparticles prepared by the thermal shock method may have excellent kinetic hydrogen storage performance, and can meet the application requirement of a solid hydrogen storage material in a thermal energy storage system or a high-density hydrogen storage system to rapidly absorb and release hydrogen. The specific scheme of the invention is as follows:
a thermal shock preparation method of multi-principal-element alloy nanoparticles is characterized by comprising the following steps:
1) preparing raw materials:
weighing at least two metal salts respectively containing elements Ti, Zr, Hf, Mo and Nb, adding a dissolving solution, and respectively preparing salt solutions with certain concentrations;
2) mixing the solution:
taking each prepared salt solution with the same volume, adding the salt solutions into a centrifuge tube for mixing, and placing the centrifuge tube in an ultrasonic cleaning instrument for cleaning and vibrating to completely and uniformly mix the salt solutions;
3) preparing a heat shock substrate:
3.1) cutting the carbon fiber cloth into carbon fiber strips, carrying out ultrasonic cleaning on the carbon fiber strips, respectively sticking copper adhesive tapes with proper lengths at two ends of the carbon fiber strips after the carbon fiber strips are dried in the air, and placing the carbon fiber strips in a glass vessel;
3.2) weighing a proper amount of graphene, adding the graphene into a salt solution, and uniformly mixing;
3.3) slowly dripping the salt solution containing graphene onto the carbon fiber strips, stopping dripping until the carbon fibers are just completely covered, and airing the dissolved solution;
3.4) repeating the step (3.3) for a plurality of times until all the solution is dripped, drying, and putting into a glove box filled with argon;
4) thermal shock:
fixing the carbon fiber strip on a heating table in a glove box, and connecting a direct-current pulse power supply to copper adhesive tapes at two ends of the carbon fiber strip; setting power supply parameters such as a current value and pulse time in a constant current mode, starting pulse current and carrying out thermal shock synthesis;
and separating the graphene with the multi-principal-element alloy nanoparticles from the carbon fiber strips by using an ultrasonic cleaning instrument.
Further, in the step (4), the pulse time is 5 s-15 s, and the current is greater than 5A. The statistical average particle size of the multi-principal element alloy nanoparticles which can be prepared is in the range of 18-89nm, and the particle size can be controlled by pulse time.
Furthermore, the purities of the metal salts containing Ti, Zr, Hf, Mo and Nb in the step (1) are respectively more than 97%, 98%, 99.5%, 99% and 99%.
Further, in the step (1), the dissolving solution is absolute ethyl alcohol or deionized water.
Further, in the step (1), the metal salts containing Ti, Zr, Hf, Mo and Nb are respectively C10H10Cl2Ti、C20H28O4Zr、Cl4Hf、MoCl、Cl5Nb。
Further, in the step (3.4), the purity of the argon is more than or equal to 99.99%.
The invention also provides the multi-principal element alloy nano-particles prepared by the thermal shock preparation method based on the multi-principal element alloy nano-particles, which is characterized in that the multi-principal element alloy nano-particles are TiaZrbHfcModNbeWherein a, b, c, d and e in the expression respectively represent the atomic ratio of each corresponding component, and the following conditions are satisfied: a is more than or equal to 5 and less than or equal to 55, b is more than or equal to 10 and less than or equal to 65, c is more than or equal to 0 and less than or equal to 20, d is more than or equal to 0 and less than or equal to 20, e is more than or equal to 0 and less than or equal to 65, and a + b + c + d + e is equal to 100.
The statistical average particle size range of the multi-principal-element alloy nano particles is 18-89 nm.
The invention also provides a thermal shock preparation method based on the multi-principal-element alloy nano-particles or application of the multi-principal-element alloy nano-particles, which is characterized in that the thermal shock preparation method of the multi-principal-element alloy nano-particles or the multi-principal-element alloy nano-particles are applied to the field of hydrogen storage.
The principle and the beneficial effects of the invention are as follows:
1. the invention provides a thermal shock preparation method of multi-principal-element alloy nanoparticles, which decomposes graphene metal mixed salt solution loaded on carbon fiber strips by thermal shock, and is simple and effective. The method overcomes the defect of difficult preparation of the multi-principal-element alloy nano particles aiming at the hydrogen storage application background.
2. The invention provides the multi-principal-element alloy nano-particles prepared by the thermal shock preparation method, the multi-principal-element alloy nano-particles are uniform in structure, the statistical average particle size range is 18-89nm, and the multi-principal-element alloy nano-particles have large specific surface area, so that the multi-principal-element alloy nano-particles have a faster hydrogen absorption and desorption rate, and the multi-principal-element alloy nano-particles can ensure that the dynamic performance of the multi-principal-element alloy nano-particles is remarkably improved on the basis of high hydrogen storage capacity.
3. The multi-principal-element alloy nano-particles prepared by the method have important application value in the field of hydrogen storage. Compared with the multi-principal-element alloy block synthesized by the traditional method (vacuum arc furnace smelting), the multi-principal-element alloy nano-particles have more excellent hydrogen storage dynamic performance advantages; the invention overcomes the defect that the traditional material cannot be put into practical application (such as Mg-based hydrogen storage material) because of poor dynamic performance, and the multi-principal-element nano-particles prepared by the method can be applied to the traditional material to improve the dynamic performance of the traditional material. In addition, the preparation of the multi-principal element hydrogen storage alloy nano particles is also beneficial to researching the hydrogen storage mechanism of the alloy under a transmission electron microscope, so that the thermal shock preparation method of the multi-principal element hydrogen storage alloy nano particles provides a theoretical basis for the design of novel alloy and the optimization and promotion of hydrogen storage performance.
Drawings
FIG. 1 is a scanning electron microstructure of multi-element hydrogen storage alloy TiZr nanoparticles prepared in the examples;
FIG. 2 is a scanning electron microstructure of a multi-element hydrogen storage alloy TiZrHfNb nanoparticles prepared in an example;
FIG. 3 is a scanning electron microstructure of a multi-element hydrogen storage alloy TiZrHfMoNb nanoparticles prepared in an example;
FIG. 4 is a scanning electron microstructure of the multi-element hydrogen storage alloy TiZrHfMoNb nanoparticles prepared in the examples.
Detailed Description
The invention is further described below with reference to the drawings and specific preferred embodiments of the description, without thereby limiting the scope of protection of the invention. The preparation and sample characterization of the present invention are illustrated by specific examples, and the preparation method and the morphology of the synthesized nanoparticles of the present invention can be fully understood by those skilled in the art from the disclosure of the present specification.
Example 1
1. And designing the composition of the multi-principal-element alloy nanoparticles.
The embodiment is a multi-main-element hydrogen storage alloy TiZr nano-particle composed of Ti and Zr.
2. And (3) preparing multi-principal element alloy nanoparticles.
The preparation of the multi-principal-element alloy nano-particles is one of the most critical steps, and the preparation process is as follows:
1) preparing raw materials: separately weighing two metal salts of Ti and Zr (titanocene dichloride C)10H10Cl2Ti, titanium zirconium acetylacetonate C20H28O4Zr), the salt selected in this example is high purity (purity above 97%); 10ml of anhydrous ethanol salt solution with the concentration of two metal salts being 0.025mol/l is respectively prepared.
2) Mixing the solution: taking each prepared salt solution with the same volume (1 ml each), adding the salt solutions into a centrifuge tube for mixing, placing the centrifuge tube in an ultrasonic cleaning instrument for cleaning and vibrating, and completely and uniformly mixing the salt solutions;
3) preparing a heat shock substrate: 3.1) cutting the carbon fiber cloth into carbon fiber strips, carrying out ultrasonic cleaning on the carbon fiber strips (the cleaning sequence is deionized water, acetone and absolute ethyl alcohol in sequence), respectively sticking copper adhesive tapes with proper lengths (the length of the copper adhesive tapes superposed with the carbon fibers is not more than 0.2cm, and the length of the copper adhesive tapes exceeding the carbon fibers is less than 0.5cm) at two ends after the carbon fibers are dried in the air, and placing the copper adhesive tapes in a glass vessel; 3.2) weighing a proper amount of graphene (2mg/ml), adding into a salt solution, and uniformly mixing; 3.3) slowly dripping the salt solution containing graphene onto the carbon fiber strips, stopping dripping until the carbon fibers are just completely covered, and airing the dissolved solution; 3.4) repeating the step (3.3) for a plurality of times until all 120 mul is dripped, drying, and putting into a transition bin of an organic glass glove box;
4) thermal shock: placing a pulse direct current power supply and a heating table for fixing carbon cloth fibers into a glass glove box of a machine, vacuumizing the glass glove box, cleaning the glass glove box once by using 99.99% of Ar gas, and introducing Ar gas with the pressure slightly less than the atmospheric pressure (so that the gloves can be operated normally and freely); operating the glove box, clamping positive and negative alligator clips of a direct-current power supply onto copper adhesive tapes at two ends of the carbon fibers, wherein the alligator clips do not exceed the adhesive tapes to touch the carbon fibers, and then fixing the alligator clips on a heating table; setting pulse current parameters as (selecting constant current mode): the voltage is 30V, the current is 5A, the time is 15s, and pulse current is used for carrying out thermal shock synthesis when the switch is started after the setting is finished. And separating the graphene with the multi-principal-element alloy nanoparticles from the carbon fiber strips by using an ultrasonic cleaning instrument.
3. And (3) characterization of the multi-principal element alloy nanoparticles.
1) Scanning electron microscope topography and texture analysis
Selecting monocrystalline silicon with proper size, ultrasonically cleaning (the cleaning sequence is acetone, deionized water and absolute ethyl alcohol in sequence) and airing, adding a proper amount of absolute ethyl alcohol (only the graphene has good dispersibility) into the multi-principal-element alloy nanoparticle loaded graphene obtained by separation, dripping the graphene solution (more than 10 mu l) onto the monocrystalline silicon, drying by an infrared heating lamp, and observing the tissue morphology of a sample by using a scanning electron microscope. As can be seen from FIG. 1, the statistical average particle size of the multi-principal element storage alloy nanoparticles is 88.65. + -. 27.97 nm.
2) Elemental distribution and atomic ratio analysis
In a scanning electron microscope observation sample tissue morphology diagram, nanoparticles (white dots in figure 1) with concentrated nanoparticle distribution, moderate size and regular shape are selected as sampling points for energy spectrum point scanning to perform point energy spectrum analysis, and atomic ratio obtained by energy spectrum counting of multi-principal-element alloy nanoparticles can be obtained by analyzing energy counting, as shown in table 1.
As seen from Table 1, the atomic ratio of Ti and Zr elements of the multi-element alloy nanoparticles is about 46: 54.
TABLE 1
| Element(s) | Atom% |
| Ti | 46.2 |
| Zr | 53.8 |
Example 2
1. And (4) specification of differences.
The embodiment of this example for synthesizing multi-element hydrogen storage alloy tizhfnb nanoparticles is the same as that of example 1, except that: the raw material is Ti, Zr, Hf and Nb salt (dichloro titanocene C10H10Cl2Ti, titanium zirconium acetylacetonate C20H28O4Zr, hafnium tetrachloride Cl4Hf and niobium pentachloride Cl5Nb); the concentrations of the four metal salts are respectively 0.0125 mol/l; the synthesis time was 5 s.
2. And (3) characterization of the multi-principal element alloy nanoparticles.
1) Scanning electron microscope topography and texture analysis
Selecting monocrystalline silicon with proper size, ultrasonically cleaning (the cleaning sequence is acetone, deionized water and absolute ethyl alcohol in sequence) and airing, adding a proper amount of absolute ethyl alcohol (only the graphene has good dispersibility) into the multi-principal-element alloy nanoparticle loaded graphene obtained by separation, dripping the graphene solution (more than 10 mu l) onto the monocrystalline silicon, drying by an ultraviolet heating lamp, and observing the tissue morphology of a sample by using a scanning electron microscope. As can be seen from FIG. 2, the statistical average particle size of the multi-principal component alloy nanoparticles is 18.74. + -. 6.02 nm.
2) Elemental distribution and atomic ratio analysis
Nanoparticles (white dots in fig. 1) with relatively flat distribution, moderate size and regular shape are selected from a tissue morphology graph of a sample observed by a scanning electron microscope and are used as sampling points for energy spectrum point scanning to perform point energy spectrum analysis, and the energy counting is analyzed to obtain the weight ratio and the atomic ratio obtained by energy spectrum counting of the multi-principal-element alloy nanoparticles, as shown in table 2.
As seen from Table 2, the atomic ratio of Ti, Zr, Hf, Nb elements of the multi-element alloy nanoparticles was about 5: 52: 3: 40.
TABLE 2
| Element(s) | Atom% |
| Ti | 5.44 |
| Zr | 52.14 |
| Hf | 2.44 |
| Nb | 39.98 |
Example 3
1. And (4) specification of differences.
In this example, a multi-element hydrogen storage alloy tizhfmonb nanoparticle is synthesized, and the specific implementation manner is the same as that in example 1, except that: the raw materials are salts of Ti, Zr, Hf, Mo and Nb(titanocene dichloride C10H10Cl2Ti, titanium zirconium acetylacetonate C20H28O4Zr, hafnium tetrachloride Cl4Hf. Molybdenum chloride ClMo and niobium pentachloride Cl5Nb); the concentrations of the five metal salts are respectively 0.0125 mol/l; the synthesis time was 15 s.
2. And (3) characterization of the multi-principal element alloy nanoparticles.
1) Scanning electron microscope topography and texture analysis
Selecting monocrystalline silicon with proper size, ultrasonically cleaning (the cleaning sequence is acetone, deionized water and absolute ethyl alcohol in sequence) and airing, adding a proper amount of absolute ethyl alcohol (only the graphene has good dispersibility) into the multi-principal-element alloy nanoparticle loaded graphene obtained by separation, dripping the graphene solution (more than 10 mu l) onto the monocrystalline silicon, drying by an ultraviolet heating lamp, and observing the tissue morphology of a sample by using a scanning electron microscope. From FIG. 3, it can be seen that the statistical average particle size of the multi-principal component alloy nanoparticles is 48.97. + -. 14.82 nm.
2) Elemental distribution and atomic ratio analysis
Nanoparticles (white dots indicated by arrows in fig. 3) with relatively flat distribution positions, moderate sizes and regular shapes are selected from a tissue morphology graph of a sample observed by a scanning electron microscope and used as sampling points for energy spectrum point scanning to perform point energy spectrum analysis, and the energy counting is analyzed to obtain the weight ratio and the atomic ratio obtained by energy spectrum counting of the multi-principal-element alloy nanoparticles, as shown in table 3.
As seen in Table 3, the atomic ratio of Ti, Zr, Hf, Mo, Nb elements of the multi-element alloy nanoparticles was about 7: 14: 6: 11: 62.
TABLE 3
| Element(s) | Atom% |
| Ti | 7.13 |
| Zr | 13.83 |
| Hf | 6.19 |
| Mo | 10.59 |
| Nb | 62.26 |
Example 4
1. And (4) specification of differences.
In this example, a multi-element hydrogen storage alloy tizhfmonb nanoparticle is synthesized, and the specific implementation manner is the same as that in example 1, except that: the raw material is Ti, Zr, Hf, Mo and Nb salt (dichloro titanocene C)10H10Cl2Ti, titanium zirconium acetylacetonate C20H28O4Zr, hafnium tetrachloride Cl4Hf. Molybdenum chloride ClMo and niobium pentachloride Cl5Nb); the concentrations of the five metal salts are respectively 0.0125 mol/l; the synthesis time was 5 s.
3. And (3) characterization of the multi-principal element alloy nanoparticles.
1) Scanning electron microscope topography and texture analysis
Selecting monocrystalline silicon with proper size, ultrasonically cleaning (the cleaning sequence is acetone, deionized water and absolute ethyl alcohol in sequence) and airing, adding a proper amount of absolute ethyl alcohol (only the graphene has good dispersibility) into the multi-principal-element alloy nanoparticle loaded graphene obtained by separation, dripping the graphene solution (more than 10 mu l) onto the monocrystalline silicon, drying by an ultraviolet heating lamp, and observing the tissue morphology of a sample by using a scanning electron microscope. From fig. 4, it can be seen that the statistical average particle size of the multi-principal-element alloy nanoparticles is 32.95+8.99 nm.
2) Elemental distribution and atomic ratio analysis
In a scanning electron microscope observation sample tissue morphology image, nanoparticles (white dots indicated by arrows in fig. 4) with concentrated nanoparticle distribution, moderate size and regular shape are selected as sampling points for energy spectrum point scanning to perform point energy spectrum analysis, and the energy counting is analyzed to obtain the weight ratio and the atomic ratio obtained by energy spectrum counting of the multi-principal-element alloy nanoparticles. As shown in table 4.
As seen from Table 4, the atomic ratio of Ti, Zr, Hf, Mo, Nb elements of the multi-element alloy nanoparticles was about 13: 17: 7: 12: 51.
TABLE 4
| Element(s) | Atom% |
| Ti | 12.67 |
| Zr | 16.57 |
| Hf | 7.17 |
| Mo | 12.19 |
| Nb | 51.41 |
In summary, the present patent is based on the solid hydrogen storage material for the application background to perform element selection design, and adopts a chemical synthesis method (mixed salt solution pulse current thermal oscillation heating) from bottom to top to prepare the multi-principal-element alloy nanoparticles, which not only have greater advantages in reaction kinetics than the traditional powder particles, but also can be directly used for the research of hydrogen storage mechanism by a transmission electron microscope due to the loading of the multi-principal-element alloy nanoparticles on graphene, thereby solving the application limitation of the traditional high-entropy alloy block or powder sample in the research aspect.
Claims (6)
1. A thermal shock preparation method of multi-principal-element alloy nanoparticles is characterized by comprising the following steps:
1) preparing raw materials:
weighing at least two metal salts respectively containing elements Ti, Zr, Hf, Mo and Nb, adding a dissolving solution, and respectively preparing salt solutions with certain concentrations;
2) mixing the solution:
taking each prepared salt solution with the same volume, adding the salt solutions into a centrifuge tube for mixing, and placing the centrifuge tube in an ultrasonic cleaning instrument for cleaning and vibrating to completely and uniformly mix the salt solutions;
3) preparing a heat shock substrate:
3.1) cutting the carbon fiber cloth into carbon fiber strips, carrying out ultrasonic cleaning on the carbon fiber strips, respectively sticking copper adhesive tapes with proper lengths at two ends of the carbon fiber strips after the carbon fiber strips are dried in the air, and placing the carbon fiber strips in a glass vessel;
3.2) weighing a proper amount of graphene, adding the graphene into a salt solution, and uniformly mixing;
3.3) slowly dripping the salt solution containing graphene onto the carbon fiber strips, stopping dripping until the carbon fibers are just completely covered, and airing the dissolved solution;
3.4) repeating the step (3.3) for a plurality of times until all the solution is dripped, drying, and putting into a glove box filled with argon;
4) thermal shock: fixing the carbon fiber strip on a heating table in a glove box, and connecting a direct-current pulse power supply to copper adhesive tapes at two ends of the carbon fiber strip; setting a current value and pulse time in a constant current mode, starting pulse current, and performing thermal shock synthesis; separating the graphene with the multi-principal-element alloy nanoparticles from the carbon fiber strips by using an ultrasonic cleaning instrument;
in the step (4), the pulse time is 5 s-15 s, the current is equal to 5A, and the average particle size range of the multi-principal-element alloy nanoparticles is 18-89 nm.
2. The thermal shock preparation method of multi-principal-element alloy nanoparticles according to claim 1, wherein the purities of the metal salts containing Ti, Zr, Hf, Mo and Nb in the step (1) are respectively more than 97%, 98%, 99.5%, 99% and 99%.
3. The thermal shock preparation method of multi-principal-element alloy nanoparticles as claimed in claim 1, wherein in the step (1), the dissolving solution is absolute ethyl alcohol or deionized water.
4. The thermal shock preparation method of multi-host alloy nanoparticles as claimed in claim 1, wherein in step (3.4), the purity of argon is greater than or equal to 99.99%.
5. A multi-host alloy nanoparticle prepared based on the thermal shock preparation method of the multi-host alloy nanoparticle according to any one of claims 1 to 4, characterized in that: the expression of the multi-principal-element alloy nano-particles is TiaZrbHfcModNbeWherein a, b, c, d and e in the expression respectively represent the atomic ratio of each corresponding component, and the following conditions are satisfied: 5 is less than or equal toa≤55，10≤b≤65，0≤c≤20，0≤d≤20，0≤e≤65，a+b+c+d+e=100。
6. A thermal shock preparation method of the multi-principal alloy nanoparticles according to any one of claims 1 to 4 or an application of the multi-principal alloy nanoparticles according to claim 5, wherein the thermal shock preparation method of the multi-principal alloy nanoparticles or the application of the multi-principal alloy nanoparticles in the hydrogen storage field.
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