JP2007145680A - Hydrogen generating material and hydrogen generating method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hydrogen generating material capable of generating hydrogen even at low temperature and capable of preserving the hydrogen in a solid state. <P>SOLUTION: The hydrogen generating material comprises a metal amide and metal hydroxide. The hydrogen generating material is heated, and the metal amide and metal hydroxide are reacted, so as to generate hydrogen. Since the reaction between the metal amide and metal hydroxide progresses at a temperature lower than 320°C, the amount of the energy used for hydrogen generation can be reduced compared with the conventional case, and also, a hydrogen generator provided with the hydrogen generating material can be miniaturized. Since the hydrogen is preserved in a solid state in the hydrogen generating material before the heating, namely, the hydrogen is, as a constituting element, taken into the metal amide and metal hydroxide as solid substances, the weight and size of the whole device can be compacted without imparting high pressure resistance to the hydrogen generator provided with the hydrogen generating material. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a hydrogen generating material and a hydrogen generating method.

  Conventionally, for example, as a technique for generating hydrogen used in fuel for fuel cells, a method using a high-pressure cylinder, a method for vaporizing liquid hydrogen, a method for heating a hydrogen generating material or a hydrogen storage material, steam reforming of hydrocarbons Laws are known. Among them, the method for heating the hydrogen generating material is simple, and the hydrogen generating apparatus using the method is small, and is suitable for mounting on a moving body. In such a hydrogen generation method, the lower the hydrogen release temperature of the hydrogen generation material, the lower the energy consumption required for hydrogen generation, and the smaller the hydrogen generation apparatus, the better.

Here, as the hydrogen generating material, for example, metal materials mainly including rare earth, titanium, vanadium, magnesium, etc., alanate hydride (for example, sodium aluminum hydride (NaAlH ₄ ), lithium aluminum hydride) Various materials such as lightweight inorganic compounds such as (LiAlH ₄ )) and carbon are known. In addition, a method for generating hydrogen through the following reactions (1) and (2) using lithium amide (LiNH ₂ ) as a hydrogen generating material has also been reported (for example, see Non-Patent Document 1).

〔Chemical formula〕
LiNH ₂ + 2LiH = Li ₂ NH + LiH + H ₂ (1)
Li ₂ NH + LiH = Li ₃ N + H ₂ (2)

Non-Patent Document 1 describes that LiNH ₂ as a hydrogen generating material in the above formula (1) is synthesized by hydrogenation of lithium nitride (Li ₃ N). Further, as the hydrogen release characteristics, it is shown that the reaction of the above formula (1) starts to proceed at 200 ° C. or higher, and the reaction of the above formula (2) starts to proceed at about 320 ° C. or higher.

In addition, an apparatus for generating hydrogen by reacting LiAlH ₄ as a hydrogen generating material with ammonia (NH ₃ ) stored as a liquid is known (see, for example, Non-Patent Document 2).

Ping Chen et al., Interaction of hydrogen with metalnitrides and imides, NATURE Vol.420, 21 NOVEMBER 2002, p302 ~ 304 Nicholas Sifer, Kristopher Gardner, “An analysis of hydrogen production ammonia hydride hydrogen generators for use in military fuel cell environments.”, Journal of Power Sources, 132, 135-138 (2004).

However, in the hydrogen generation method described in Non-Patent Document 1, the reaction represented by the above formula (2) does not proceed unless the temperature is about 320 ° C. or higher. For this reason, sufficient heat resistance must be given to the hydrogen generator using the hydrogen generation method, and the entire apparatus becomes large. In addition, when hydrogen is generated, the amount of energy required for heating increases. From such a viewpoint, development of a hydrogen generating material capable of generating hydrogen at a temperature lower than 320 ° C. is desired.
On the other hand, in the configuration described in Non-Patent Document 2, since liquid ammonia is required for hydrogen generation, a sufficient pressure resistance must be imparted to a container for storing liquid ammonia. For this reason, the weight and size of the entire apparatus are increased, and it may be difficult to mount the apparatus on a moving body, for example, and may become impractical. In this regard, if hydrogen can be stored in a solid state without using liquid ammonia, the problem does not occur.

  In view of the above-described problems, an object of the present invention is to provide a hydrogen generating material and a hydrogen generating method capable of generating hydrogen even at a low temperature and storing hydrogen in a solid state.

In order to achieve the above object, the hydrogen generating material of the present invention includes a metal amide and a metal hydride, and the metal amide and the metal hydride react with each other by heating to generate hydrogen. Features.
According to the present invention, since the reaction between the metal amide and the metal hydride can proceed even at a temperature lower than 320 ° C., the amount of energy used for hydrogen generation can be reduced as compared with the prior art, and the hydrogen generating material can be used. The hydrogen generator equipped with can be reduced in size. Further, hydrogen is stored in a solid state in the hydrogen generating material before heating, that is, it is incorporated as a constituent element in the metal amide and metal hydride which are solid substances. For this reason, the weight and size of the whole apparatus can be made compact, without giving a big pressure | voltage resistance to the hydrogen generator provided with the said hydrogen generating material.

Here, examples of the metal of the metal amide include alkali metals (Li, Na, K, Rb, etc.), alkaline earth metals (Be, Mg, Ca, Sr, etc.), Sc, Y, rare earth metals (La, Ce). , Nd, Sm, Eu, Gd), 3B group metals (B, Al, Ga, etc.), 4B group metals (C, Si, Ge, etc.) and the like.
In the present invention, the metal amide is preferably a metal amide containing two or more metals. Examples of such metal amides containing two or more metals include LiB (NH ₂ ) ₄ , LiAl (NH ₂ ) ₄ , LiNa ₂ (NH ₂ ) ₃ , Li ₃ Na (NH ₂ ) ₄ , Li _5. Na (NH ₂ ) ₆ , NaB (NH ₂ ) ₂ , NaAl (NH ₂ ) _{2 and the} like can be mentioned. Furthermore, in the present invention, the metal amide is preferably a metal amide containing Li and Al, and particularly LiAl (NH ₂ ) ₄ is desirable.
According to the present invention, hydrogen can be generated even at a temperature lower than 320 ° C., and hydrogen can be stored in a solid state. In particular, when LiAl (NH ₂ ) ₄ is used as the metal amide, hydrogen can be generated even at about 160 ° C., so that the energy consumed for hydrogen generation can be greatly reduced, and the hydrogen generation apparatus can be made more compact. it can.

  Examples of the method for synthesizing such metal amides include a method of synthesizing by hydrogenation of nitride and a method of synthesizing by reaction of metal and ammonia. In the present invention, the metal amide is composed of metal and ammonia. It is desirable to synthesize by reaction. In this case, since the metal amide constituting the hydrogen generating material can be obtained with high yield, the manufacturing cost of the hydrogen generating material can be reduced. Examples of the method for synthesizing the metal amide include the following methods (a) to (c).

(A) A metal is dissolved in liquid ammonia and reacted. In this case, the reaction temperature is preferably −40 to 400 ° C., the pressure is 0.01 to 500 MPa, and the reaction time is preferably 0.01 to 500 hours. Note that the reaction rate is low at a temperature lower than −40 ° C., and the decomposition reaction of the metal amide proceeds simultaneously at a temperature higher than 400 ° C. Further, since the ammonia cannot be maintained in a liquid state at a pressure lower than 0.01 MPa, the reaction does not proceed satisfactorily, and at a pressure higher than 500 MPa, the pressure resistant material is expensive, which is not realistic. The reaction does not proceed sufficiently when the reaction time is shorter than 0.01 hours, and the productivity is problematic when the reaction time is longer than 500 hours.

(B) The metal is reacted in an ammonia atmosphere. In this case, the reaction temperature is preferably 0 to 500 ° C., the pressure is 0.01 to 500 MPa, and the reaction time is preferably 0.01 to 500 hours. The reaction rate is low at a temperature lower than 0 ° C., and the decomposition reaction of the metal amide proceeds simultaneously at a temperature higher than 500 ° C. In addition, the reaction rate is low at a pressure lower than 0.01 MPa, so that the reaction does not proceed well. At a pressure higher than 500 MPa, the pressure resistant material is expensive, which is not realistic. The reaction does not proceed sufficiently when the reaction time is shorter than 0.01 hours, and the productivity is problematic when the reaction time is longer than 500 hours.

(C) A metal salt (chloride, bromide, iodide, etc., preferably chloride) is dissolved in liquid ammonia and reacted. In this case, the reaction temperature is preferably −40 to 400 ° C., the pressure is 0.01 to 500 MPa, and the reaction time is preferably 0.01 to 500 hours. The reaction rate is low at temperatures lower than −40 ° C., and the metal amide decomposition reaction proceeds simultaneously at temperatures higher than 400 ° C. Further, since the ammonia cannot be maintained in a liquid state at a pressure lower than 0.01 MPa, the reaction does not proceed satisfactorily, and at a pressure higher than 500 MPa, the pressure resistant material is expensive, which is not realistic. And reaction time does not advance fully in reaction time shorter than 0.01 hour, and there exists a problem in productivity in reaction time longer than 500 hours. After the reaction, a salt such as ammonium chloride formed as a by-product is removed by sublimation or the like.

Examples of the metal hydride include alkali metals (Li, Na, K, Rb, etc.), alkaline earth metals (Be, Mg, Ca, Sr, etc.), Sc, Y, rare earth metals (La, Ce). , Nd, Sm, Eu, Gd), 3B group metals (B, Al, Ga, etc.), 4B group metals (C, Si, Ge, etc.) and the like. In the present invention, the metal hydride is preferably a metal hydride containing two or more metals. Examples of such metal hydrides containing two or more metals include LiBH ₄ , LiAlH ₄ , Li ₃ AlH ₆ , (Li, Na) AlH ₄ , NaBH ₄ , NaAlH _{4, and the} like. Furthermore, in the present invention, the metal hydride is preferably a metal hydride containing Li and Al, and LiAlH ₄ and Li ₃ AlH ₆ are particularly desirable.
According to the present invention, hydrogen can be generated even at a temperature lower than 320 ° C., and hydrogen can be stored in a solid state. In particular, when LiAlH ₄ is used as the metal hydride, it becomes possible to generate hydrogen at about 160 ° C., so that the energy consumed for hydrogen generation can be greatly reduced, and the hydrogen generator can be made more compact.

As a method for synthesizing such a metal hydride, for example, a method of reacting a metal in a hydrogen atmosphere can be exemplified. In this case, the reaction temperature is preferably 0 to 500 ° C., the pressure is 0.01 to 50 MPa, and the reaction time is preferably 0.01 to 500 hours. The reaction rate is low at a temperature lower than 0 ° C., and the metal hydride decomposition reaction proceeds simultaneously at a temperature higher than 500 ° C. Further, the reaction rate is low at a pressure lower than 0.01 MPa, so that the reaction does not proceed well, and at a pressure higher than 500 MPa, the pressure resistant material is expensive, which is not realistic. And reaction time does not advance fully in reaction time shorter than 0.01 hour, and there exists a problem in productivity in reaction time longer than 500 hours.
Moreover, it is preferable to synthesize a metal hydride containing two or more kinds of metals, for example, LiAlH ₄ by reacting LiH and AlCl ₃ in diethyl ether. In this case, the reaction temperature is desirably in the range from −50 ° C. to the boiling point of diethyl ether (34.6 ° C.).

  In addition to the metal amide and the metal hydride, a catalyst functional substance is preferably added to the hydrogen generating material of the present invention described above. Thereby, decomposition reaction of metal amide and hydrogen generation reaction by metal hydride and ammonia can be promoted. Therefore, the hydrogen generation amount per unit weight or unit volume of the hydrogen generating material can be increased.

Such catalytic functional materials include boron (B), carbon (C), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), platinum (Pt), palladium (Pd), rhodium. (Rh), lithium (Li), sodium (Na), magnesium (Mg), potassium (K), iridium (Ir), neodymium (Nd), lanthanum (La), calcium (Ca), vanadium (V), titanium (Ti), chromium (Cr), copper (Cu), zinc (Zn), aluminum (Al), silicon (Si), ruthenium (Ru), molybdenum (Mo), tungsten (W), tantalum (Ta), zirconium (Zr), hafnium (Hf), or one or more metals selected from silver (Ag), a compound thereof, an alloy thereof, or a hydrogen storage alloy. Door is preferable. In such a case, the effect of promoting the hydrogen generation reaction can be obtained with certainty.
Moreover, it is preferable that the said catalyst functional substance is added within the range of 0.1 mass% or more and 20 mass% or less with respect to the said metal hydride. In such a case, the promotion efficiency of the hydrogen generation reaction can be improved. In addition, when the addition amount of the catalyst functional material is lower than 0.1% by mass, the effect of promoting the hydrogen generation reaction cannot be obtained, and when the addition amount of the catalytic functional material is higher than 20% by mass, the metal amide and the metal hydrogen are obtained. There is a risk of inhibiting the reaction with the chemical.

The present invention as described above can be established not only as a hydrogen generating material but also as a hydrogen generating method. That is, the hydrogen generation method of the present invention is to heat a hydrogen generating material composed of a metal amide and a metal hydride to react the metal amide with the metal hydride to generate hydrogen. Features.
According to the present invention as described above, the same effects as those of the hydrogen generating material described above can be obtained. That is, hydrogen can be generated even at a temperature lower than 320 ° C., and hydrogen can be stored in a solid state.

Hereinafter, an embodiment of the present invention will be described.
The hydrogen generating material of the present embodiment includes lithium aluminum amide (LiAl (NH ₂ ) ₄ ) as a metal amide containing Li and Al, and lithium aluminum hydride (LiAlH ₄ ) as a metal hydride containing Li and Al. And a catalytic functional substance. These metal amide, metal hydride, and catalytic function substance are each formed in powder form and sealed in a reaction vessel in a sufficiently mixed state.

LiAl (NH ₂ ) ₄ is synthesized, for example, by dissolving metal Li and metal Al in liquid ammonia and reacting them. In the synthesis reaction, the temperature is −40 to 400 ° C., the pressure is 0.01 kPa to 500 MPa, and the reaction time is 0.01 to 500 hours. For example, when metal Li and metal Al are dissolved in liquid ammonia at −34 ° C. or lower and then heated to 80 ° C. and allowed to react for 72 hours, about 450 mg of LiAl (NH ₂ ) with respect to 40 mg of raw material metal Li ₄ is generated.
LiAlH ₄ is synthesized, for example, by reacting lithium hydride (LiH) and aluminum chloride (AlCl ₃ ) in diethyl ether. In the synthesis reaction, the temperature is in the range from −50 ° C. to the boiling point of diethyl ether (34.6 degrees).
The catalytic functional substance is, for example, TiCl ₃ . Such a catalyst functional substance is added in the range of 0.1% by mass or more and 20% by mass or less with respect to LiAlH ₄ which is a metal hydride.

In the hydrogen generation method using the hydrogen generating material of the present embodiment described above, the reaction vessel in which the hydrogen generating material is sealed is heated to a predetermined temperature (preferably 30 to 500 ° C., more preferably 100 to 300 ° C.). It is carried out by doing. As a result, the reaction shown in (3) below proceeds between the metal amide (LiAl (NH ₂ ) ₄ ) and the metal hydride (LiAlH ₄ ) to generate hydrogen. The reaction shown in the following (3) can proceed at about 160 ° C., and the reaction rate is very high. In addition, the reaction shown in (3) below may not proceed at a temperature of about 100 ° C. or lower. This is also confirmed in the examples described later.

〔Chemical formula〕
3LiAlH ₄ + 3LiAl (NH ₂ ) ₄ → 6LiNH ₂ + 2Al ₂ (NH) ₃ + 2Al + 9H ₂ (3)

According to such this embodiment, the following effects can be obtained.
The hydrogen generating material of the present embodiment is configured to include LiAl (NH ₂ ) ₄ , LiAlH _4, and a catalytic functional material, and LiAl (NH ₂ ) ₄ and LiAlH ₄ are converted into the above formula (3) by heating. ) To generate hydrogen. Since the reaction represented by the above formula (3) can proceed at about 160 ° C., the energy used for hydrogen generation can be reduced as compared with the prior art, and the hydrogen generator equipped with the hydrogen generating material can be downsized. it can. Furthermore, since the reaction represented by the above formula (3) proceeds at a high reaction rate, a hydrogen generator capable of instantaneously generating a desired amount of hydrogen can be provided.
Further, hydrogen is stored in a solid state in the hydrogen generating material before heating, that is, it is incorporated as a constituent element in LiAl (NH ₂ ) ₄ and LiAlH ₄ which are solid substances. For this reason, the weight and size of the whole apparatus can be made compact, without giving a big pressure | voltage resistance to the hydrogen generator provided with the said hydrogen generating material.
Furthermore, since the catalyst functional substance is added in the range of 0.1% by mass or more and 20% by mass or less with respect to LiAlH ₄ , decomposition reaction of LiAl (NH ₂ ) ₄ , hydrogen generation reaction by LiAlH ₄ and ammonia Can be promoted. Therefore, the hydrogen generation amount per unit weight or unit volume of the hydrogen generating material can be increased.
In this embodiment, the metal amide, the metal hydride, and the catalytic functional substance are each formed in a powder form and sealed in the reaction vessel in a sufficiently mixed state. The hydrogen generation reaction proceeds well. Further, since the hydrogen generating reaction does not proceed at a temperature lower than 100 ° C., the hydrogen generating material can be managed even at room temperature, and can be easily transported in a state where the hydrogen generating material is sealed in the reaction vessel. Therefore, the hydrogen generating material of this embodiment and the hydrogen generating apparatus provided with the same can be suitably used, for example, when mounted on a moving body.

In addition, this invention is not limited to the above-mentioned embodiment, The deformation | transformation in the range which can achieve the objective of this invention, improvement, etc. are included in this invention.
For example, in the above-described embodiment, the configuration in which LiAl (NH ₂ ) ₄ is used as the metal amide, LiAlH ₄ is used as the metal hydride, and a catalyst functional substance is added is exemplified, but the present invention is not limited thereto. That is, any metal may be used in the metal amide and the metal hydride as long as hydrogen is generated by the reaction between the metal amide and the metal hydride. Even in such a case, the hydrogen generating material is obtained as a solid substance, and hydrogen can be generated even at a low temperature. In addition, the catalyst generating substance may not be added to the hydrogen generating material. In this case, the hydrogen generating material is obtained as a solid substance and the hydrogen generating reaction proceeds even at a low temperature although the hydrogen generating reaction rate is not improved.

Hereinafter, the present invention will be described more specifically with reference to examples.
(1) Synthesis of metal amide
(1-1) Synthesis of LiNH ₂ 40 mg of metal Li was put into a stainless steel container having a total capacity of 20 ml, and while cooling the container to −34 ° C. or lower, ammonia gas was introduced and liquefied to dissolve the metal. Thereafter, the stainless steel container was heated to 80 ° C. and held for 72 hours. The temperature was lowered after a predetermined time, and ammonia was removed from the container as a gas. As a result, about 80 mg of LiNH ₂ was obtained, and the yield was 60.5% (in terms of Li).

(1-2) Synthesis of LiAl (NH ₂ ) ₄ Into a stainless steel container with a total capacity of 20 ml, 40 mg of metal Li and 156 mg of metal Al are put, and while cooling the container to −34 ° C. or lower, ammonia gas is introduced and liquefied. Dissolved. Thereafter, the stainless steel container was heated to 80 ° C. and held for 72 hours. The temperature was lowered after a predetermined time, and ammonia was removed from the container as a gas. As a result, about 450 mg of LiAl (NH ₂ ) ₄ was obtained, and the yield was 79.7% (Li conversion).

In the above (1-1) and (1-2), the yields of LiNH ₂ and LiAl (NH ₂ ) ₄ were both high values exceeding 60%. From this, it can be seen that the metal amide is preferably synthesized by the reaction of the metal and ammonia. Further, comparing the results of (1-1) and (1-2) above, LiAl (NH ₂ ) ₄ was obtained in a higher yield, and the metal amide contained two or more metals. It can be seen that metal amides are preferred, particularly those containing Li and Al.

(2) Example 1
681 mg of LiAl (NH ₂ ) ₄ synthesized in the above (1-2) and 275.7 mg of LiAlH ₄ manufactured by Aldrich were mixed well in a mortar (Example 1), and a part of the mixture was used in an Ar stream. DSC (Differential Scanning Calorimetry) was measured. FIG. 1 shows DSC measurement results, and FIG. 2 shows XRD (X-ray Diffractometer) measurement results before and after the reaction. In FIG. 2, the lower pattern in the figure corresponds to the sample before heating, the middle pattern in the figure corresponds to the sample after heating to 170 ° C., and the upper pattern in the figure after heating to 420 ° C. Corresponds to the sample.

From FIG. 1, a large exothermic peak was observed at around 160 ° C. From this, it was found that LiAl (NH ₂ ) ₄ and LiAlH ₄ react completely at about 160 ° C., and that the reaction rate is very high because the width of the curve in FIG. 1 is narrow. And since the endothermic peak is observed around 130 ° C., it seems that the reaction may not proceed at about 100 ° C. or less.
In FIG. 2, in the sample before the reaction (lower part in the figure), peaks indicating LiAl (NH ₂ ) ₄ and LiNH ₂ are mainly observed. In the sample after heating to 170 ° C. (center in the figure), the peak indicating LiAl (NH ₂ ) ₄ was greatly reduced. Furthermore, in the sample after heating to 420 ° C. (upper side in the figure), a peak indicating LiAl (NH ₂ ) ₄ was hardly observed, and peaks indicating LiNH ₂ , Li ₃ AlN ₂ and Li ₂ O were observed. From this, it is understood that the hydrogen generation reaction of the above formula (3) proceeds by heating in Example 1, and the reaction of the above formula (3) is almost completely completed at 170 ° C.
Therefore, it was found that by using LiAl (NH ₂ ) ₄ as the metal amide and LiAlH ₄ as the metal hydride, hydrogen can be generated at a high reaction rate at about 160 ° C.

(3) Example 2
45.6 mg of synthesized LiAl (NH ₂ ) _{4 and} 11.3 mg of LiH manufactured by Aldrich were mixed well in a mortar (Example 2), and DSC was measured in an Ar stream using a part of the mixture. This material reacted completely at around 310 ° C. From the XRD measurement before and after the reaction and the like, it is considered that the reaction represented by the following formula (4) has progressed to generate hydrogen.

〔Chemical formula〕
6LiH + 3LiAl (NH ₂ ) ₄ → 3Li ₂ NH + Li ₃ AlN ₂ + 2AlN + 5NH ₃ + 6H ₂ (4)

From the experimental results of Example 2, it was found that hydrogen can be generated at about 310 ° C. by using LiAl (NH ₂ ) ₄ as the metal amide and LiH as the metal hydride. Further, comparing Example 1 and Example 2, since Example 1 can generate hydrogen at a lower temperature, the metal hydride is a metal hydride containing two or more metals, particularly Li It has been found preferable to use a metal hydride containing Al and Al.

It is a DSC measurement result about Example 1 of this invention. It is a XRD measurement result about the said Example 1. FIG.

Claims (18)

Comprising a metal amide and a metal hydride,
A hydrogen generating material, wherein the metal amide and the metal hydride react by heating to generate hydrogen. The hydrogen generating material according to claim 1,
The hydrogen generating material, wherein the metal amide is a metal amide containing two or more kinds of metals. The hydrogen generating material according to claim 1 or 2,
The hydrogen generating material, wherein the metal amide is a metal amide containing lithium (Li) and aluminum (Al). The hydrogen generating material according to any one of claims 1 to 3,
The metal amide was synthesized by a reaction between a metal and ammonia. The hydrogen generating material according to any one of claims 1 to 4,
The metal hydride is a metal hydride containing two or more kinds of metals. The hydrogen generating material according to any one of claims 1 to 5,
The metal hydride is a metal hydride containing lithium (Li) and aluminum (Al). The hydrogen generating material according to any one of claims 1 to 6,
A hydrogen generating material, wherein a catalytic functional substance is added in addition to the metal amide and the metal hydride. The hydrogen generating material according to claim 7,
The catalytic functional materials are boron (B), carbon (C), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), platinum (Pt), palladium (Pd), rhodium (Rh). , Lithium (Li), sodium (Na), magnesium (Mg), potassium (K), iridium (Ir), neodymium (Nd), lanthanum (La), calcium (Ca), vanadium (V), titanium (Ti) , Chromium (Cr), copper (Cu), zinc (Zn), aluminum (Al), silicon (Si), ruthenium (Ru), molybdenum (Mo), tungsten (W), tantalum (Ta), zirconium (Zr) One or more metals selected from hafnium (Hf) and silver (Ag), a compound thereof, an alloy thereof, or a hydrogen storage alloy, Hydrogen generating material. The hydrogen generating material according to claim 7 or 8,
The hydrogen generating material, wherein the catalytic functional substance is added in a range of 0.1% by mass or more and 20% by mass or less with respect to the metal hydride. Heating a hydrogen generating material composed of a metal amide and a metal hydride;
A hydrogen generation method, wherein the metal amide and the metal hydride are reacted to generate hydrogen. The hydrogen generation method according to claim 10,
The method for generating hydrogen, wherein the metal amide is a metal amide containing two or more metals. The hydrogen generation method according to claim 10 or 11,
The method for generating hydrogen, wherein the metal amide is a metal amide containing lithium (Li) and aluminum (Al). The hydrogen generation method according to any one of claims 10 to 12,
The method for generating hydrogen, wherein the metal amide is synthesized by reacting a metal with ammonia. The hydrogen generation method according to any one of claims 10 to 13,
The method for generating hydrogen, wherein the metal hydride is a metal hydride containing two or more kinds of metals. The hydrogen generation method according to any one of claims 10 to 14,
The method for generating hydrogen, wherein the metal hydride is a metal hydride containing lithium (Li) and aluminum (Al). The hydrogen generation method according to any one of claims 10 to 15,
In addition to the metal amide and the metal hydride, a catalytic function substance is added. The method for generating hydrogen according to claim 16,
The catalytic functional materials are boron (B), carbon (C), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), platinum (Pt), palladium (Pd), rhodium (Rh). , Lithium (Li), sodium (Na), magnesium (Mg), potassium (K), iridium (Ir), neodymium (Nd), lanthanum (La), calcium (Ca), vanadium (V), titanium (Ti) , Chromium (Cr), copper (Cu), zinc (Zn), aluminum (Al), silicon (Si), ruthenium (Ru), molybdenum (Mo), tungsten (W), tantalum (Ta), zirconium (Zr) One or more metals selected from hafnium (Hf) and silver (Ag), a compound thereof, an alloy thereof, or a hydrogen storage alloy, To generate hydrogen. The hydrogen generation method according to claim 16 or 17,
The method for generating hydrogen, wherein the catalytic functional substance is added in a range of 0.1% by mass to 20% by mass with respect to the metal hydride.

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