CN109939682A - M-B/γ-Al2O3The preparation method and application of catalyst - Google Patents
M-B/γ-Al2O3The preparation method and application of catalyst Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Abstract
The present invention discloses M-B/ γ-Al2O3The preparation method of catalyst, comprising the following steps: a, by nanometer γ-Al2O3After powder is added to the water ultrasonic mixing, M Cl is added2·6H2O, ultrasonic mixing obtain suspending liquid A, nanometer γ-Al2O3The mass ratio of powder and water is 1: (50-600), nanometer γ-Al2O3Powder and M Cl2·6H2The molar ratio of O is (0.5-2): 1；B, suspending liquid A in step a is added in sodium borohydride, mixing, reaction to bubble-free generates, and obtains M-B/ γ-Al2O3Suspension, sodium borohydride and M Cl2·6H2The molar ratio of O is (2-3): 1；C, by M-B/ γ-Al in step b2O3Suspension is filtered, is cleaned, is filtered, under room temperature, dry, obtains M-B/ γ-Al2O3Catalyst, while its application being provided.Preparation method of the present invention is simple, for when being catalyzed aluminum-water reaction hydrogen manufacturing, having very high activity, only aluminium powder, catalyst need to be added to the water can make fine aluminium powder and water successive reaction and generate hydrogen prepared catalyst, entire hydrogen production process is succinct, efficient, and no pollution to the environment.
Description
Technical field
The invention belongs to aluminum-water reaction hydrogen producing technology fields.
Background technique
With the sustainable development of world economy and the continuous improvement of human living standard, people get over the demand of the energy
Come bigger.Currently, the energy resource supply of countries in the world is based on fossil fuel, however, a large amount of uses of fossil fuel can cause
A series of energy and environmental problem, such as fossil fuel is increasingly depleted, greenhouse effects, atmosphere pollution, acid rain.Therefore, the world
Various countries will establish cleaning, safe and sustainable energy resource structure as the emphasis of 21 century energy strategy.Hydrogen Energy is a kind of cleaning
Secondary energy sources, have many advantages, such as from a wealth of sources, zero-emission, can be mutually converted with the other forms energy.
Fuel cell is the ideal style of hydrogen utilization, and chemical energy directly can be changed into electric energy without being followed by Kano by it
The limitation of ring, while the product of fuel cell is water, no pollution to the environment.Hydrogen source used in portable fuel battery require hydrogen manufacturing or
The hydrogen storage content of hydrogen storage material is high, without noxious material (such as carbon monoxide), while requiring hydrogen-feeding system relatively simple, compact.Currently,
Most common hydrogen storage mode is high pressure compressed hydrogen storage and low-temperature liquefaction hydrogen storage, it is difficult to meet the needs of portable fuel battery,
The industrialized development of fuel cell is constrained to a certain extent.
In order to solve the problems, such as the hydrogen source of fuel cell, people turn to production hydrogen material in situ, and the hydrogen material in situ that produces can scene
Hydrogen manufacturing, real-time hydrogen supply, and storage easier than hydrogen and transport.Metallic aluminium is a kind of very promising production hydrogen material in situ, property
Vivaciously, resourceful, relative low price, 1Kg aluminium can produce 0.11Kg hydrogen.However, when metallic aluminium is exposed to oxidation ring
When border, surface will form one layer of fine and close oxide film, hinders aluminium and reacts with the direct of water.In order to promote aluminium and water
Directly reaction generates hydrogen, and various activating technologies occur in succession, as to react hydrogen manufacturing, alloying aluminium and water in alkaline solution anti-for aluminium
Answering hydrogen manufacturing, high-energy ball milling to activate, aluminium reacts hydrogen manufacturing with water, surface modified aluminium reacts hydrogen manufacturing, aluminium with water under the catalysis of the catalyst
Hydrogen manufacturing etc. is reacted with water.In these activation methods, aluminium reacts hydrogen producing technology with larger with water under the catalysis of the catalyst
Potentiality, this method is easy to operate, is not required to handle aluminium, only aluminium and catalyst need to be added to the water can prepare hydrogen
Gas.Currently, common catalyst has γ-Al2O3、TiO2Equal oxides, Al (OH)3Deng, but the catalytic efficiency of above-mentioned catalyst compared with
It is low.Therefore, seeking a kind of effective catalyst for the reaction hydrogen manufacturing of aluminium-water just seems particularly critical.
Summary of the invention
It is an object of that present invention to provide M-B/ γ-Al2O3The preparation method of catalyst, while M-B/ γ-Al being provided2O3It urges
The application of agent is another goal of the invention of the invention.
Based on above-mentioned purpose, the present invention takes following technical scheme:
M-B/γ-Al2O3The preparation method of catalyst, comprising the following steps:
A, by nanometer γ-Al2O3After powder is added to the water ultrasonic mixing, M Cl is added2·6H2O, ultrasonic mixing obtain suspending liquid A,
Nanometer γ-Al2O3The mass ratio of powder and water is 1: (50-600), nanometer γ-Al2O3Powder and M Cl2·6H2The molar ratio of O
For (0.5-2): 1；
B, suspending liquid A in step a is added in sodium borohydride, mixing, reaction to bubble-free generates, and obtains M-B/ γ-Al2O3It suspends
Liquid, sodium borohydride and M Cl2·6H2The molar ratio of O is (2-3): 1；Reaction equation are as follows:
2MCl2+4NaBH4+9H2O→M2B↓+25/2H2↑+3B(OH)3+4NaCl
4M2B+3O2→8M+2B2O3
C, by M-B/ γ-Al in step b2O3Suspension is filtered, is cleaned, is filtered, under room temperature, dry, obtains M-B/ γ-
Al2O3Catalyst.
M Cl in step a2·6H2O is CoCl2·6H2O or NiCl2·6H2O。
Ultrasound condition in step a: ultrasonic power 100-300W, supersonic frequency 20-60kHz, nanometer γ-Al2O3Powder
With water ultrasonic mixing 0.5-3h, M Cl is added2·6H2After O, continue ultrasonic mixing 0.5-2h.
It when being cleaned in step c, first washes with water 3-5 times, then uses washes of absolute alcohol；Drying condition: temperature 20-30
DEG C, drying time 8-12h.
Water is deionized water in step a and c.
Utilize M-B/ γ-Al made from above-mentioned preparation method2O3The application of catalyst, by M-B/ γ-Al2O3Catalyst is answered
For aluminum-water reaction hydrogen manufacturing.
M-B/γ-Al2O3Catalyst is applied to the method for aluminum-water reaction hydrogen manufacturing are as follows: under confined conditions, by M-B/ γ-Al2O3
Catalyst and aluminium powder are added to the water mixing, at 25-60 DEG C, react and hydrogen is made, the mass ratio of water and aluminium powder is (15-300):
1, M-B/ γ-Al2O3The quality of catalyst accounts for M-B/ γ-Al2O3The 5-30% of the quality sum of catalyst and aluminium powder.Aluminum water is anti-
The reaction equation answered are as follows:
Al+3H2O→Al(OH)3+3/2H2↑
M-B/ γ-the Al2O3Catalyst is Co-B/ γ-Al2O3Catalyst or Ni-B/ γ-Al2O3Catalyst.
Compared with prior art, the invention has the following advantages:
Preparation method of the present invention is simple, and whole preparation process does not need harsh process conditions, surpasses employed in preparation process
Acoustic processing method can reduce the reunion of catalyst, improve the active area of catalyst；Prepared M-B/ γ-Al2O3(M=
Co, Ni) catalyst for be catalyzed aluminum-water reaction hydrogen manufacturing when, have very high activity；In hydrogen production process, it is not required to locate aluminium in advance
Reason is not needed using acid or alkali yet, and only aluminium powder, catalyst, which need to be added to the water, can make fine aluminium powder and water successive reaction simultaneously
Hydrogen is generated, entire hydrogen production process is succinct, efficient, and no pollution to the environment.
Detailed description of the invention
Fig. 1 is fine aluminium powder, Examples 1 and 2 M-B/ γ-Al2O3The x-ray diffraction pattern of catalyst；
Fig. 2 is Examples 1 and 2 M-B/ γ-Al2O3Catalyst electron scanning micrograph；
Fig. 3 is to add Co-B/ γ-Al at 40 DEG C2O3Etc. different catalysts, the complete reactivity of fine aluminium powder and water is at any time
Variation diagram；
Fig. 4 is to add Ni-B/ γ-Al at 40 DEG C2O3Etc. different catalysts, the complete reactivity of fine aluminium powder and water is at any time
Variation diagram；
Fig. 5 at different temperatures, adds the catalyst of embodiment 1, and the complete reactivity of fine aluminium powder and water changes with time
Figure.
Specific embodiment
Embodiment 1
Co-B/γ-Al2O3The preparation method of catalyst, comprising the following steps:
A, in room temperature (25 DEG C), ultrasonic power 150W, supersonic frequency be under 40kHz, by nanometer γ-Al2O3Dress is added in powder
Have and be placed in the beaker of deionized water in ultrasonic water bath slot after ultrasonic mixing 1h, adds CoCl2·6H2O continues ultrasonic mixing
0.5h obtains suspending liquid A, nanometer γ-Al2O3The mass ratio of powder and water is 1: 250, nanometer γ-Al2O3Powder and CoCl2·
6H2The molar ratio of O is 1: 1；
B, suspending liquid A in step a is added in sodium borohydride in 30s, is mixed (hand operated mixing), vigorous reaction is black to generating
Color precipitating, bubble-free generate, and obtain Co-B/ γ-Al2O3Suspension, sodium borohydride and CoCl2·6H2The molar ratio of O is 2: 1；
C, by Co-B/ γ-Al in step b2O3Suspension filtered, first with deionized water clean 3 times, it is clear with dehydrated alcohol again
It washes 1 time, filters, at 25 DEG C, dry 10h obtains Co-B/ γ-Al2O3Catalyst.
Utilize Co-B/ γ-Al made from above-mentioned preparation method2O3The application of catalyst, by Co-B/ γ-Al2O3Catalyst
Applied to aluminum-water reaction hydrogen manufacturing, Co-B/ γ-Al2O3Catalyst is applied to the method for aluminum-water reaction hydrogen manufacturing are as follows: under confined conditions, will
Co-B/γ-Al2O3Catalyst and aluminium powder are added to the water mixing, at 25-60 DEG C, react and hydrogen, the quality of water and aluminium powder is made
Than for 250: 1, Co-B/ γ-Al2O3The quality of catalyst accounts for Co-B/ γ-Al2O3The quality sum of catalyst and aluminium powder
10%.
Embodiment 2
Ni-B/γ-Al2O3The preparation method of catalyst, comprising the following steps:
A, in room temperature (25 DEG C), ultrasonic power 150W, supersonic frequency be under 40kHz, by nanometer γ-Al2O3Dress is added in powder
Have and be placed in the beaker of deionized water in ultrasonic water bath slot after middle ultrasonic mixing 1h, adds NiCl2·6H2O continues ultrasonic mixing
0.5h obtains suspending liquid A, nanometer γ-Al2O3The mass ratio of powder and water is 1: 250, nanometer γ-Al2O3Powder and NiCl2·
6H2The molar ratio of O is 1: 1；
B, suspending liquid A in step a is added in sodium borohydride in 30s, is mixed (hand operated mixing), vigorous reaction is black to generating
Color precipitating, bubble-free generate, and obtain Ni-B/ γ-Al2O3Suspension, sodium borohydride and NiCl2·6H2The molar ratio of O is 2: 1；
C, by Ni-B/ γ-Al in step b2O3Suspension filtered, first with deionized water clean 3 times, it is clear with dehydrated alcohol again
It washes 1 time, filters, at 25 DEG C, dry 10h obtains Ni-B/ γ-Al2O3Catalyst.
Utilize Ni-B/ γ-Al made from above-mentioned preparation method2O3The application of catalyst, by Ni-B/ γ-Al2O3Catalyst
Applied to aluminum-water reaction hydrogen manufacturing, Ni-B/ γ-Al2O3Catalyst is applied to the method for aluminum-water reaction hydrogen manufacturing are as follows: under confined conditions, will
Ni-B/γ-Al2O3Catalyst and aluminium powder are added to the water mixing, at 25-60 DEG C, react and hydrogen, the quality of water and aluminium powder is made
Than for 250: 1, Ni-B/ γ-Al2O3The quality of catalyst accounts for Ni-B/ γ-Al2O3The quality sum of catalyst and aluminium powder
10%.
Embodiment 3
Co-B/γ-Al2O3The preparation method of catalyst, comprising the following steps:
A, in room temperature (25 DEG C), ultrasonic power 100W, supersonic frequency be under 20kHz, by nanometer γ-Al2O3Dress is added in powder
Have and be placed in the beaker of deionized water in ultrasonic water bath slot after middle ultrasonic mixing 3h, adds CoCl2·6H2O continues ultrasonic mixing
2h obtains suspending liquid A, nanometer γ-Al2O3The mass ratio of powder and water is 1: 600, nanometer γ-Al2O3Powder and CoCl2·6H2O
Molar ratio be 0.5: 1；
B, suspending liquid A in step a is added in sodium borohydride in 30s, is mixed (hand operated mixing), vigorous reaction is black to generating
Color precipitating, bubble-free generate, and obtain Co-B/ γ-Al2O3Suspension, sodium borohydride and CoCl2·6H2The molar ratio of O is 2: 1；
C, by Co-B/ γ-Al in step b2O3Suspension filtered, first with deionized water clean 3 times, it is clear with dehydrated alcohol again
It washes 1 time, filters, at 25 DEG C, dry 10h obtains Co-B/ γ-Al2O3Catalyst.
Utilize Co-B/ γ-Al made from above-mentioned preparation method2O3The application of catalyst, by Co-B/ γ-Al2O3Catalyst
Applied to aluminum-water reaction hydrogen manufacturing, Co-B/ γ-Al2O3Catalyst is applied to the method for aluminum-water reaction hydrogen manufacturing are as follows: under confined conditions, will
Co-B/γ-Al2O3Catalyst and aluminium powder are added to the water mixing, at 25-60 DEG C, react and hydrogen, the quality of water and aluminium powder is made
Than for 300: 1, Co-B/ γ-Al2O3The quality of catalyst accounts for Co-B/ γ-Al2O3The quality sum of catalyst and aluminium powder
20%.
Embodiment 4
Co-B/γ-Al2O3The preparation method of catalyst, comprising the following steps:
A, in room temperature (25 DEG C), ultrasonic power 300W, supersonic frequency be under 60kHz, by nanometer γ-Al2O3Dress is added in powder
Have and be placed in the beaker of deionized water in ultrasonic water bath slot after middle ultrasonic mixing 0.5h, adds CoCl2·6H2It is mixed to continue ultrasound by O
1h is closed, suspending liquid A, nanometer γ-Al are obtained2O3The mass ratio of powder and water is 1: 50, nanometer γ-Al2O3Powder and CoCl2·6H2O
Molar ratio be 2: 1；
B, suspending liquid A in step a is added in sodium borohydride in 30s, is mixed (hand operated mixing), vigorous reaction is black to generating
Color precipitating, bubble-free generate, and obtain Co-B/ γ-Al2O3Suspension, sodium borohydride and CoCl2·6H2The molar ratio of O is 2: 1；
C, by Co-B/ γ-Al in step b2O3Suspension filtered, first with deionized water clean 3 times, it is clear with dehydrated alcohol again
It washes 1 time, filters, at 25 DEG C, dry 10h obtains Co-B/ γ-Al2O3Catalyst.
Utilize Co-B/ γ-Al made from above-mentioned preparation method2O3The application of catalyst, by Co-B/ γ-Al2O3Catalyst
Applied to aluminum-water reaction hydrogen manufacturing, Co-B/ γ-Al2O3Catalyst is applied to the method for aluminum-water reaction hydrogen manufacturing are as follows: under confined conditions, will
Co-B/γ-Al2O3Catalyst and aluminium powder are added to the water mixing, at 25-60 DEG C, react and hydrogen, the quality of water and aluminium powder is made
Than for 50: 1, Co-B/ γ-Al2O3The quality of catalyst accounts for Co-B/ γ-Al2O3The 5% of the quality sum of catalyst and aluminium powder.
Embodiment 5
Ni-B/γ-Al2O3The preparation method of catalyst, comprising the following steps:
A, in room temperature (25 DEG C), ultrasonic power 100W, supersonic frequency be under 20kHz, by nanometer γ-Al2O3Dress is added in powder
Have and be placed in the beaker of deionized water in ultrasonic water bath slot after middle ultrasonic mixing 2h, adds NiCl2·6H2O continues ultrasonic mixing
2h obtains suspending liquid A, nanometer γ-Al2O3The mass ratio of powder and water is 1: 400, nanometer γ-Al2O3Powder and NiCl2·6H2O
Molar ratio be 0.5: 1；
B, suspending liquid A in step a is added in sodium borohydride in 30s, is mixed (hand operated mixing), vigorous reaction is black to generating
Color precipitating, bubble-free generate, and obtain Ni-B/ γ-Al2O3Suspension, sodium borohydride and NiCl2·6H2The molar ratio of O is 2: 1；
C, by Ni-B/ γ-Al in step b2O3Suspension filtered, first with deionized water clean 3 times, it is clear with dehydrated alcohol again
It washes 1 time, filters, at 25 DEG C, dry 10h obtains Ni-B/ γ-Al2O3Catalyst.
Utilize Ni-B/ γ-Al made from above-mentioned preparation method2O3The application of catalyst, by Ni-B/ γ-Al2O3Catalyst
Applied to aluminum-water reaction hydrogen manufacturing, Ni-B/ γ-Al2O3Catalyst is applied to the method for aluminum-water reaction hydrogen manufacturing are as follows: under confined conditions, will
Ni-B/γ-Al2O3Catalyst and aluminium powder are added to the water mixing, at 25-60 DEG C, react and hydrogen, the quality of water and aluminium powder is made
Than for 300: 1, Ni-B/ γ-Al2O3The quality of catalyst accounts for Ni-B/ γ-Al2O3The quality sum of catalyst and aluminium powder
30%.
Embodiment 6
Ni-B/γ-Al2O3The preparation method of catalyst, comprising the following steps:
A, in room temperature (25 DEG C), ultrasonic power 300W, supersonic frequency be under 60kHz, by nanometer γ-Al2O3Dress is added in powder
Have and be placed in the beaker of deionized water in ultrasonic water bath slot after middle ultrasonic mixing 0.5h, adds NiCl2·6H2It is mixed to continue ultrasound by O
0.5h is closed, suspending liquid A, nanometer γ-Al are obtained2O3The mass ratio of powder and water is 1: 500, nanometer γ-Al2O3Powder and NiCl2·
6H2The molar ratio of O is 1: 1；
B, suspending liquid A in step a is added in sodium borohydride in 30s, is mixed (hand operated mixing), vigorous reaction is black to generating
Color precipitating, bubble-free generate, and obtain Ni-B/ γ-Al2O3Suspension, sodium borohydride and NiCl2·6H2The molar ratio of O is 2: 1；
C, by Ni-B/ γ-Al in step b2O3Suspension filtered, first with deionized water clean 3 times, it is clear with dehydrated alcohol again
It washes 1 time, filters, at 25 DEG C, dry 10h obtains Ni-B/ γ-Al2O3Catalyst.
Utilize Ni-B/ γ-Al made from above-mentioned preparation method2O3The application of catalyst, by Ni-B/ γ-Al2O3Catalyst
Applied to aluminum-water reaction hydrogen manufacturing, Ni-B/ γ-Al2O3Catalyst is applied to the method for aluminum-water reaction hydrogen manufacturing are as follows: under confined conditions, will
Ni-B/γ-Al2O3Catalyst and aluminium powder are added to the water mixing, at 25-60 DEG C, react and hydrogen, the quality of water and aluminium powder is made
Than for 50: 1, Ni-B/ γ-Al2O3The quality of catalyst accounts for Ni-B/ γ-Al2O3The 15% of the quality sum of catalyst and aluminium powder.
7 effect test of embodiment
For convenient for being compared with catalyst of the invention, the Co-B catalyst of obtained reference examples and Ni-B catalyst are compared
Compared with.
Reference examples 1
Difference from example 1 is that: a nanometer γ-Al is not added in step a2O3Powder, other steps with embodiment 1,
Prepare Co-B catalyst.
Reference examples 2
With embodiment 2 the difference is that: a nanometer γ-Al is not added in step a2O3Powder, other steps with embodiment 2,
Prepare Ni-B catalyst.
The catalyst of 7.1 pairs of embodiments 1,2 and reference examples 1,2 carries out structural characterization
To pure aluminium powder, Co-B/ γ-Al2O3With Ni-B/ γ-Al2O3Catalyst carries out X-ray diffraction analysis, map such as Fig. 1 institute
Show.In Fig. 1, (a) is the fine aluminium powder that average-size is 1.75 microns；It (b) is Co-B/ γ-Al2O3Catalyst；It (c) is Ni-B/
γ-Al2O3Catalyst.
Structural analysis is carried out to the catalyst of Examples 1 and 2, electron scanning micrograph as shown in Fig. 2, in Fig. 2,
It (a) is Co-B/ γ-Al2O3Catalyst；It (b) is Ni-B/ γ-Al2O3Catalyst.
As shown in Figure 1, in addition to aluminium does not have other ingredients in aluminium powder；And Co-B/ γ-Al2O3With Ni-B/ γ-Al2O3Catalysis
Agent is amorphous.
As shown in Figure 2, Co-B and Ni-B is dispersed in γ-Al2O3Surface, it is indicated above that γ-Al2O3Improve Co-B and
The dispersibility of Ni-B increases the active area of Co-B and Ni-B.
The test of 7.2 catalyst performances
Co-B/ γ-Al prepared by embodiment 12O3It is prepared by catalyst, the Co-B catalyst of the preparation of reference examples 1, embodiment 2
Ni-B/γ-Al2O3Ni-B catalyst prepared by catalyst and reference examples 2 does catalysis aluminum-water reaction hydrogen manufacturing experimental performance respectively and surveys
Examination.
250mL water is taken to be put into four closed glass containers, the gasmetry pipe that glass container fills water with one is connected；So
Co-B/ γ-Al prepared by a certain amount of embodiment 1 is separately added into backward glass container2O3Prepared by catalyst or reference examples 1
Ni-B/ γ-Al prepared by Co-B catalyst or embodiment 22O3Ni-B catalyst prepared by catalyst or reference examples 2, is subsequently added into
A certain amount of metallic aluminium powder, and being stirred evenly aluminium powder body with catalyst with glass bar, finally by glass container it is closed after open
Begin to test.Wherein the weight ratio of water and aluminium powder is 250: 1, and the quality of catalyst accounts for the quality sum of catalyst and aluminium powder
10%.Hydrogen is only generated since aluminium is reacted with water, we are by drainage, according to the volume change of gasmetry Guan Zhongshui
Come calculate react produced by hydrogen volume, calculate metallic aluminium powder further according to equation for ideal gases and reacted with the complete of water
Rate changes with time, that is, produces hydrogen progress curve, namely produces hydrogen progress.Under the conditions of 40 DEG C, different catalysis are added
The complete reactivity versus time curve difference of agent, fine aluminium powder and water is as shown in Figures 3 and 4.Under condition of different temperatures,
Add Co-B/ γ-Al2O3The complete reactivity versus time curve of catalyst, fine aluminium powder and water is as shown in Figure 5.
By Fig. 3 and 4 it is found that under the conditions of 40 DEG C, in deionized water, fine aluminium powder will not react in 3 hours with water
And generate hydrogen.But after catalyst is added, fine aluminium powder is will be with water successive reaction after the induction period of one section of short time
And generate hydrogen.Co-B/γ-Al2O3With Ni-B/ γ-Al2O3Catalyst is best to aluminium-water hydrogen production reaction catalytic effect, far
It is much better than γ-Al2O3, Co-B, Ni-B catalytic effect.It is indicated above that Co-B/ γ-Al2O3With Ni-B/ γ-Al2O3Catalyst
Chemical activity with higher can significantly promote aluminum water hydrogen production reaction.
As shown in Figure 5, Co-B/ γ-Al2O3Catalyst aluminium-water reacts the rate of hydrogen manufacturing with the raising of reaction temperature
And it increases sharply.Under the conditions of 60 DEG C, conversion ratio of the aluminum-water reaction in 3 hours can achieve 92% or more, this completely can be with
Meets the needs of portable fuel battery.In addition, Co-B/ γ-Al2O3The rate of catalysis aluminum-water reaction hydrogen manufacturing can pass through adjusting
Controlling reaction temperature.
Claims (8)
1.M-B/γ-Al2O3The preparation method of catalyst, which comprises the following steps:
A, by nanometer γ-Al2O3After powder is added to the water ultrasonic mixing, MCl is added2·6H2O, ultrasonic mixing obtain suspending liquid A, receive
Rice γ-Al2O3The mass ratio of powder and water is 1: (50-600), nanometer γ-Al2O3Powder and MCl2·6H2The molar ratio of O is
(0.5-2):1；
B, suspending liquid A in step a is added in sodium borohydride, mixing, reaction to bubble-free generates, and obtains M-B/ γ-Al2O3It suspends
Liquid, sodium borohydride and MCl2·6H2The molar ratio of O is (2-3): 1；
C, by M-B/ γ-Al in step b2O3Suspension is filtered, is cleaned, is filtered, under room temperature, dry, obtains M-B/ γ-
Al2O3Catalyst.
2. M-B/ γ-Al as described in claim 12O3The preparation method of catalyst, which is characterized in that MCl in step a2·
6H2O is CoCl2·6H2O or NiCl2·6H2O。
3. M-B/ γ-Al as claimed in claim 22O3The preparation method of catalyst, which is characterized in that ultrasonic item in step a
Part: ultrasonic power 100-300W, supersonic frequency 20-60kHz, nanometer γ-Al2O3Powder and water ultrasonic mixing 0.5-3h, add
Add MCl2·6H2After O, continue ultrasonic mixing 0.5-2h.
4. M-B/ γ-Al as claimed in claim 32O3The preparation method of catalyst, which is characterized in that when being cleaned in step c,
It first washes with water 3-5 times, then uses washes of absolute alcohol；Drying condition: temperature is 20-30 DEG C, drying time 8-12h.
5. M-B/ γ-Al as claimed in claim 42O3The preparation method of catalyst, which is characterized in that water is in step a and c
Deionized water.
6. M-B/ γ-Al made from the preparation method using claim 12O3The application of catalyst, which is characterized in that by M-B/
γ-Al2O3Catalyst is applied to aluminum-water reaction hydrogen manufacturing.
7. M-B/ γ-Al as claimed in claim 62O3The application of catalyst, which is characterized in that M-B/ γ-Al2O3Catalyst is answered
Method for aluminum-water reaction hydrogen manufacturing are as follows: under confined conditions, by M-B/ γ-Al2O3Catalyst and aluminium powder are added to the water mixing, in
It at 25-60 DEG C, reacts and hydrogen is made, the mass ratio of water and aluminium powder is (15-300): 1, M-B/ γ-Al2O3The quality of catalyst accounts for
M-B/γ-Al2O3The 5-30% of the quality sum of catalyst and aluminium powder.
8. M-B/ γ-Al as claimed in claim 72O3The application of catalyst, which is characterized in that the M-B/ γ-Al2O3Catalysis
Agent is Co-B/ γ-Al2O3Catalyst or Ni-B/ γ-Al2O3Catalyst.
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