CN109037714A - A kind of distributed cobalt-base catalyst and preparation method of fuel cell - Google Patents
A kind of distributed cobalt-base catalyst and preparation method of fuel cell Download PDFInfo
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- CN109037714A CN109037714A CN201810832498.6A CN201810832498A CN109037714A CN 109037714 A CN109037714 A CN 109037714A CN 201810832498 A CN201810832498 A CN 201810832498A CN 109037714 A CN109037714 A CN 109037714A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/90—Selection of catalytic material
- H01M4/9041—Metals or alloys
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/90—Selection of catalytic material
- H01M4/9075—Catalytic material supported on carriers, e.g. powder carriers
- H01M4/9083—Catalytic material supported on carriers, e.g. powder carriers on carbon or graphite
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
- Y02E60/50—Fuel cells
Abstract
The present invention proposes the distributed cobalt-base catalyst and preparation method of a kind of fuel cell; the cobalt-base catalyst first passes through zinc nitrate and prepares nano zine oxide; by dip loading in porous flake organic polymer surface and interlayer; then it is impregnated in aqueous solution; cobalt nitrate is added under alkaline condition, carries out vacuum high-temperature heat treatment under nitrogen and hydrogen gas mixture protection after taking-up and is made.Cobalt-base catalyst provided by the invention, nano zine oxide is uniformly distributed in the polymer by dipping, make metallic cobalt by zinc oxide uniform load in carbon ball surface through carbonization and reduction treatment, to effectively improve the dispersibility of metallic cobalt, improve the catalytic activity of catalyst, catalytic performance is excellent, and long service life can be widely used for fuel cell.
Description
Technical field
The present invention relates to field of fuel cell technology, a kind of distributed cobalt-base catalyst more particularly to fuel cell and
Preparation method.
Background technique
Fuel cell, especially Proton Exchange Membrane Fuel Cells have the characteristics that energy conversion efficiency is high, free of contamination, very
It is suitable as the power source of green novel energy source automobile.Fuel cell electric car can solve automobile industry development bring environment
With energy problem, new opportunity is brought for auto industry future development.Its membrane electrode is core component, by proton exchange membrane, is urged
Agent, gas diffusion layers are combined.Wherein, the performance of catalyst directly affects the stability, usability and system of fuel cell
Standby cost, it is one of the critical material for developing fuel cell.
So far, fuel-cell catalyst is still based on platinum.Expensive due to platinum, scarcity of resources causes fuel
Battery cost is very high, greatly limits it and is widely applied.In recent years, many researchs are conceived to raising Pt base cathodic oxygen reduction and urge
The stability of agent, utilization rate, modified electrode structure reduce fuel cell cost to reduce platinum load capacity.But basic outlet
It should be that exploitation can substitute platinum, inexpensive, resourceful non-platinum catalyst, such as metallic cobalt completely, fire in recent years
Expect to be taken seriously in the research and application in cell catalyst field.
Currently, the catalytic performance of non-precious metal catalyst is then difficult to meet the needs of Proton Exchange Membrane Fuel Cells, and mention
The means of high catalyst activity are mainly to improve the density and the more active sites of surface exposure of active site, but be easy
Cause the decline of proton exchange membrane and catalyst service life, and will lead to preparation process and tend to be complicated.Therefore, one kind is developed
The simple and effective high dispersive type catalyst of synthesis technology and the compound of catalyst and membrane electrode have highly important practical significance.
Chinese invention patent application number 201610055510.8 discloses a kind of fuel cell and is urged with hud typed gold/cobalt/boron
Agent, the catalyst are the golden cobalt-boron alloy with core-shell structure, and wherein amorphous cobalt-boron is shell, and crystalline state gold is core；The invention
Core-shell catalyst be amorphous material wrap up crystalline material, be different from previous " brilliant peritectoid " structure, which has both non-
The denominator of crystalline material and crystalline material, catalytic performance is superior, can effectively improve the discharge performance of fuel cell, significantly
The dosage for reducing noble metal significantly reduces fuel cell cost, this is beneficial to the development for promoting fuel cell, using one
Stage reduction method preparation.Chinese invention patent application number 201711074620.X discloses a kind of monatomic cobalt/graphite olefinic proton friendship
The preparation method of membrane cell catalyst is changed, which uses sodium alginate, melamine, cobalt acetate, zinc acetate and stone
Black alkene is raw material, is successfully prepared out the monatomic cobalt load graphene cathod catalyst of used in proton exchange membrane fuel cell；It should
Catalyst shows excellent catalytic performance, in wave inception potential, half wave potential, in terms of limiting current density with business now
Pt/C catalyst will be got well, and show very excellent stability.
Low few in order to improve non-precious metal catalyst superficial catalytic activation site, dispersion is uneven, and catalytic performance is low to be lacked
It falls into, and avoids the process for improving catalytic activity in the prior art complicated and ineffective problem, it is necessary to propose a kind of new
Type dispersing type non-precious metal catalyst, and then the dispersibility in catalyst surface active site is improved, promote catalytic performance.
Summary of the invention
For current fuel cell platinum based noble metal catalyst amount big and at high cost problem and Non-precious Metal Catalysts
The active site of agent is few and is unevenly distributed, and there are complex process for existing solution, easily reduces catalyst service life
The defects of, the present invention proposes a kind of fuel cell ceramic gas diffusion layer and preparation method, to improve metallic cobalt in carbon
The dispersibility of ball surface, improves catalytic performance.
To solve the above problems, the invention adopts the following technical scheme:
A kind of distributed cobalt-base catalyst of fuel cell, the cobalt-base catalyst first pass through zinc nitrate and prepare nano zine oxide,
It by dip loading in porous flake organic polymer surface and interlayer, is impregnated in aqueous solution, nitre is added under alkaline condition
Sour cobalt carries out vacuum high-temperature heat treatment under reducing atmosphere after taking-up and is made.
Preferably, the porous flake organic polymer be expanded polystyrene, it is porous polysulfones, porous polyarylate, porous
The combination of one or more of polyurethane, porous polyimide.
Preferably, in the nitrogen and hydrogen gas mixture, nitrogen, hydrogen volume ratio be 1:3-4.
The present invention also provides a kind of preparation methods of the distributed cobalt-base catalyst of fuel cell, and specific preparation method is such as
Under:
(1) zinc nitrate, sodium hydroxide are added to absolute ethanol, ultrasonic disperse is uniform, and heating carries out back flow reaction, obtains nanometer
Zinc oxide colloid；
(2) porous flake macromolecule organic polymer is added in nano zine oxide colloid, is taken out after impregnating 24-25h, obtains table
The porous flake macromolecule organic polymer in face and interlayer load zinc oxide；
(3) porous flake high molecular polymer is added in deionized water, addition ammonium hydroxide adjusting pH value to alkalinity, while nitre is added
The hydroxyl group of acidic cobalt solution, closed ageing, zinc oxide surface polarizes under alkaline condition, generates negative electrical charge, cobalt ions
Zinc oxide particle surfaces are adsorbed to by electrostatic interaction, wash drying after taking-up, it is porous to obtain load zinc oxide/cobalt nitrate
Flaky polymer organic polymer；
(4) porous flake high molecular polymer is subjected to vacuum high-temperature heat treatment under nitrogen and hydrogen gas mixture protection, it is high
Molecularly Imprinted Polymer substrate is carbonized, while cobalt ions is reduced to metallic cobalt, is evenly distributed on zinc oxide surface, is made and is formed carbon
The zinc oxide of load/cobalt composite catalyst.
Preferably, the temperature of heating reflux reaction described in step (1) is 80-85 DEG C.
Preferably, in reaction system described in step (1), zinc nitrate, sodium hydroxide, dehydrated alcohol mass ratio be 1:
0.5-0.7:10-15。
Preferably, in system described in step (2), porous flake macromolecule organic polymer, nano zine oxide colloid
Mass ratio is 1:1.5-2.
Preferably, the time of closed ageing described in step (3) is 12-13h.
Preferably, in system described in step (3), porous flake high molecular polymer, cobalt nitrate mass ratio be 1:
0.3-0.4。
Preferably, the vacuum degree of the heat treatment of vacuum high-temperature described in step (4) is 0.1-0.3Pa, temperature 1500-2000
DEG C, handle 1-2h.
The active site of existing non-precious metal catalyst is few and is unevenly distributed, and causes catalytic performance poor, technique mistake
Journey is complicated, limits its application.In consideration of it, the present invention proposes a kind of preparation side of the distributed cobalt-base catalyst of fuel cell
Zinc nitrate, sodium hydroxide are added to absolute ethanol, are stirred by ultrasonic by method, flow back later in heating, prepare nano oxygen
Change zinc colloid；, later will porous flake macromolecule organic polymer immerse colloidal solution in, after dipping take out, later will be porous
Flaky polymer polymer immerses in deionized water, adjusts pH to alkalinity and cobalt nitrate solution is added simultaneously, after closed ageing, by piece
Shaped polymer takes out, carries out vacuum high-temperature heat treatment, sheet polymer cracking carbonization under nitrogen and hydrogen gas mixture protection
For dusty material, the catalyst material as obtained.After being prepared as nano zine oxide by zinc nitrate, by dip loading in
Organic polymer surface and interlayer, in aqueous solution, zinc oxide surface is coated by great amount of hydroxy group group, is occurred under alkaline condition
Polarization, generates a large amount of negative electrical charges, cobalt ions is adsorbed to zinc oxide particle surfaces by electrostatic interaction, by under reducing atmosphere
Vacuum high-temperature heat treatment, high molecular polymer substrate is carbonized, while cobalt ions is reduced to metallic cobalt, is evenly distributed on oxidation
Zinc surface forms zinc oxide/cobalt composite catalyst of carbon load, effectively increases the dispersibility of metallic cobalt, improve catalyst
Catalytic performance.
The present invention proposes the distributed cobalt-base catalyst and preparation method of a kind of fuel cell, compared with prior art,
Prominent feature and excellent effect are:
1, the present invention in aqueous solution restores high-temperature process after cobalt ions absorption by zinc oxide, is evenly distributed on cobalt ions
Nano granular of zinc oxide surface.
2, in preparation process of the invention, nano zine oxide is uniformly distributed in the polymer by dipping, is carbonized and is gone back
Original place reason makes metallic cobalt by zinc oxide uniform load on carbon ball surface, to effectively improve the dispersibility of metallic cobalt.
3, catalyst activity prepared by the present invention is high, and catalytic performance is excellent, can be widely used for fuel cell.
Specific embodiment
In the following, the present invention will be further described in detail by way of specific embodiments, but this should not be interpreted as to the present invention
Range be only limitted to example below.Without departing from the idea of the above method of the present invention, according to ordinary skill
The various replacements or change that knowledge and customary means are made, should be included in the scope of the present invention.
Embodiment 1
(1) zinc nitrate, sodium hydroxide are added to absolute ethanol, ultrasonic disperse is uniform, and heating carries out back flow reaction, obtains nanometer
Zinc oxide colloid；The temperature of heating reflux reaction is 83 DEG C；In reaction system, the quality of zinc nitrate, sodium hydroxide, dehydrated alcohol
Than for 1:0.6:12；
(2) porous flake macromolecule organic polymer is added in nano zine oxide colloid, is taken out after impregnating 24.5h, obtains table
The porous flake macromolecule organic polymer in face and interlayer load zinc oxide；Porous flake organic polymer is porous polyphenyl second
Alkene；In system, porous flake macromolecule organic polymer, nano zine oxide colloid mass ratio be 1:1.8；
(3) porous flake high molecular polymer is added in deionized water, addition ammonium hydroxide adjusting pH value to alkalinity, while nitre is added
Acidic cobalt solution, closed ageing wash drying after taking-up, and it is organic poly- to obtain load zinc oxide/cobalt nitrate porous flake macromolecule
Close object；The time of closed ageing is 12.5h；In system, porous flake high molecular polymer, cobalt nitrate mass ratio be 1:0.3；
(4) porous flake high molecular polymer is subjected to vacuum high-temperature heat treatment, system under nitrogen and hydrogen gas mixture protection
Zinc oxide/cobalt composite catalyst of carbon load must be formed；In nitrogen and hydrogen gas mixture, nitrogen, hydrogen volume ratio be 1:
3.5；The vacuum degree of vacuum high-temperature heat treatment is 0.2Pa, and temperature is 1800 DEG C, handles 1.5h.
Test method:
The cobalt-base catalyst that the present embodiment is prepared, which carries out dispersion, to be tested, using scanning transmission electron microscope (HitachiHD-
2000STEM), it is tested under 200KV voltage, observation metallic cobalt obtains that the results are shown in Table 1 in the dispersibility of catalyst surface；
The cobalt-base catalyst that the present embodiment is prepared carries out catalytic performance test, is tested using cyclic voltammetry, in IM6/
Cyclic voltammetric analysis is carried out using standard three electrode system on IM6e electrochemical workstation (Zahner, Germany).Ag/ in three electrodes
AgCl electrode is reference electrode, and platinum electrode is used as the electrode for being coated with catalyst layer of the present invention to electrode as working electrode, uses
The rotating disk electrode (r.d.e) device AFMS-LXF rotating disk electrode (r.d.e) that is the production of PINE company of the U.S. and device (diameter is not
5.0mm), electrolyte 0.5mol/LH2SO4, scanning range is -0.2 ~ 1.0V (vs.Ag/AgCl), and sweep speed 50mV/s will
The catalyst of the present embodiment is evenly applied to glassy carbon electrode surface；It can indicate that catalyst is living using the size of electrochemical surface area
The latent active of property position, mainly calculates according to electricity needed for catalyst ideal smooth surface cobalt oxidation hydrogen, obtains result such as table 1
It is shown.
Comparative example 1
Compared with Example 1, not in polymer surfaces and interlayer supported nano zinc oxide, catalyst obtained uses comparative example 1
The method of embodiment 1 is tested, and test result is as shown in table 1.
Embodiment 2
(1) zinc nitrate, sodium hydroxide are added to absolute ethanol, ultrasonic disperse is uniform, and heating carries out back flow reaction, obtains nanometer
Zinc oxide colloid；The temperature of heating reflux reaction is 80 DEG C；In reaction system, the quality of zinc nitrate, sodium hydroxide, dehydrated alcohol
Than for 1:0.5:10；
(2) porous flake macromolecule organic polymer is added in nano zine oxide colloid, dipping takes out afterwards for 24 hours, obtains surface
With the porous flake macromolecule organic polymer of interlayer load zinc oxide；Porous flake organic polymer is porous polysulfones；System
In, porous flake macromolecule organic polymer, nano zine oxide colloid mass ratio be 1:1.5；
(3) porous flake high molecular polymer is added in deionized water, addition ammonium hydroxide adjusting pH value to alkalinity, while nitre is added
Acidic cobalt solution, closed ageing wash drying after taking-up, and it is organic poly- to obtain load zinc oxide/cobalt nitrate porous flake macromolecule
Close object；The time of closed ageing is 12h；In system, porous flake high molecular polymer, cobalt nitrate mass ratio be 1:0.3；
(4) porous flake high molecular polymer is subjected to vacuum high-temperature heat treatment, system under nitrogen and hydrogen gas mixture protection
Zinc oxide/cobalt composite catalyst of carbon load must be formed；In nitrogen and hydrogen gas mixture, nitrogen, hydrogen volume ratio be 1:
3；The vacuum degree of vacuum high-temperature heat treatment is 0.1Pa, and temperature is 1500 DEG C, handles 2h.
It is tested using the method for embodiment 1, test result is as shown in table 1.
Comparative example 2
Comparative example 2 compared with Example 2, directly mixes the porous flake macromolecule organic polymer of metallic cobalt and load zinc oxide
High-temperature vacuum is handled after conjunction, and catalyst obtained is tested using the method for embodiment 1, and test result is as shown in table 1.
Embodiment 3
(1) zinc nitrate, sodium hydroxide are added to absolute ethanol, ultrasonic disperse is uniform, and heating carries out back flow reaction, obtains nanometer
Zinc oxide colloid；The temperature of heating reflux reaction is 85 DEG C；In reaction system, the quality of zinc nitrate, sodium hydroxide, dehydrated alcohol
Than for 1:0.7:15；
(2) porous flake macromolecule organic polymer is added in nano zine oxide colloid, is taken out after impregnating 25h, obtains surface
With the porous flake macromolecule organic polymer of interlayer load zinc oxide；Porous flake organic polymer is porous polyarylate；Body
In system, porous flake macromolecule organic polymer, nano zine oxide colloid mass ratio be 1:2；
(3) porous flake high molecular polymer is added in deionized water, addition ammonium hydroxide adjusting pH value to alkalinity, while nitre is added
Acidic cobalt solution, closed ageing wash drying after taking-up, and it is organic poly- to obtain load zinc oxide/cobalt nitrate porous flake macromolecule
Close object；The time of closed ageing is 13h；In system, porous flake high molecular polymer, cobalt nitrate mass ratio be 1:0.4；
(4) porous flake high molecular polymer is subjected to vacuum high-temperature heat treatment, system under nitrogen and hydrogen gas mixture protection
Zinc oxide/cobalt composite catalyst of carbon load must be formed；In nitrogen and hydrogen gas mixture, nitrogen, hydrogen volume ratio be 1:
4；The vacuum degree of vacuum high-temperature heat treatment is 0.3Pa, and temperature is 2000 DEG C, handles 1h.
It is tested using the method for embodiment 1, test result is as shown in table 1.
Comparative example 3
Compared with Example 3, high-temperature process after directly mixing metallic cobalt, zinc oxide and high molecular polymer is made comparative example 3
Catalyst tested using the method for embodiment 1, test result is as shown in table 1.
Embodiment 4
(1) zinc nitrate, sodium hydroxide are added to absolute ethanol, ultrasonic disperse is uniform, and heating carries out back flow reaction, obtains nanometer
Zinc oxide colloid；The temperature of heating reflux reaction is 82 DEG C；In reaction system, the quality of zinc nitrate, sodium hydroxide, dehydrated alcohol
Than for 1:0.6:14；
(2) porous flake macromolecule organic polymer is added in nano zine oxide colloid, dipping takes out afterwards for 24 hours, obtains surface
With the porous flake macromolecule organic polymer of interlayer load zinc oxide；Porous flake organic polymer is cellular polyurethane；Body
In system, porous flake macromolecule organic polymer, nano zine oxide colloid mass ratio be 1:1.9；
(3) porous flake high molecular polymer is added in deionized water, addition ammonium hydroxide adjusting pH value to alkalinity, while nitre is added
Acidic cobalt solution, closed ageing wash drying after taking-up, and it is organic poly- to obtain load zinc oxide/cobalt nitrate porous flake macromolecule
Close object；The time of closed ageing is 12h；In system, porous flake high molecular polymer, cobalt nitrate mass ratio be 1:0.3；
(4) porous flake high molecular polymer is subjected to vacuum high-temperature heat treatment, system under nitrogen and hydrogen gas mixture protection
Zinc oxide/cobalt composite catalyst of carbon load must be formed；In nitrogen and hydrogen gas mixture, nitrogen, hydrogen volume ratio be 1:
4；The vacuum degree of vacuum high-temperature heat treatment is 0.3Pa, and temperature is 1900 DEG C, handles 2h.
It is tested using the method for embodiment 1, test result is as shown in table 1.
Comparative example 4
Comparative example 4 compared with Example 4, is not added with porous flake high molecular polymer, catalyst obtained is using embodiment 1
Method is tested, and test result is as shown in table 1.
Table 1:
| Performance indicator | Metallic cobalt dispersing character | Electro-chemical activity specific area (m2/ g) |
| Embodiment 1 | It is uniformly dispersed | 201.4 |
| Comparative example 1 | Dispersion is uneven, reunites serious | 145.2 |
| Embodiment 2 | It is uniformly dispersed | 202.1 |
| Comparative example 2 | Dispersion is uneven, there is agglomeration | 158.4 |
| Embodiment 3 | It is uniformly dispersed | 200.8 |
| Comparative example 3 | Dispersion is uneven, there is agglomeration | 167.2 |
| Embodiment 4 | It is uniformly dispersed | 201.2 |
| Comparative example 4 | Dispersion is uneven, more reunion | 152.5 |
Claims (10)
1. a kind of distributed cobalt-base catalyst of fuel cell, which is characterized in that the cobalt-base catalyst first passes through zinc nitrate system
Standby nano zine oxide is impregnated in aqueous solution by dip loading in porous flake organic polymer surface and interlayer, in alkalinity
Under the conditions of cobalt nitrate is added, after taking-up nitrogen and hydrogen gas mixture protection under carry out vacuum high-temperature heat treatment and be made.
2. a kind of distributed cobalt-base catalyst of fuel cell according to claim 1, which is characterized in that the porous chips
Shape organic polymer is expanded polystyrene, porous polysulfones, porous polyarylate, cellular polyurethane, one in porous polyimide
Kind or two or more combinations.
3. a kind of distributed cobalt-base catalyst of fuel cell according to claim 1, which is characterized in that the nitrogen and
In hydrogen gas mixture, nitrogen, hydrogen volume ratio be 1:3-4.
4. a kind of preparation method of the distributed cobalt-base catalyst of fuel cell as described in any claim of claim 1-3,
Be characterized in that, it is specific the preparation method is as follows:
(1) zinc nitrate, sodium hydroxide are added to absolute ethanol, ultrasonic disperse is uniform, and heating carries out back flow reaction, obtains nanometer
Zinc oxide colloid；
(2) porous flake macromolecule organic polymer is added in nano zine oxide colloid, is taken out after impregnating 24-25h, obtains table
The porous flake macromolecule organic polymer in face and interlayer load zinc oxide；
(3) porous flake high molecular polymer is added in deionized water, addition ammonium hydroxide adjusting pH value to alkalinity, while nitre is added
The hydroxyl group of acidic cobalt solution, closed ageing, zinc oxide surface polarizes under alkaline condition, generates negative electrical charge, cobalt ions
Zinc oxide particle surfaces are adsorbed to by electrostatic interaction, wash drying after taking-up, it is porous to obtain load zinc oxide/cobalt nitrate
Flaky polymer organic polymer；
(4) porous flake high molecular polymer is subjected to vacuum high-temperature heat treatment under nitrogen and hydrogen gas mixture protection, it is high
Molecularly Imprinted Polymer substrate is carbonized, while cobalt ions is reduced to metallic cobalt, is evenly distributed on zinc oxide surface, is made and is formed carbon
The zinc oxide of load/cobalt composite catalyst.
5. a kind of preparation method of the distributed cobalt-base catalyst of fuel cell according to claim 4, which is characterized in that
The temperature of heating reflux reaction described in step (1) is 80-85 DEG C.
6. a kind of preparation method of the distributed cobalt-base catalyst of fuel cell according to claim 4, which is characterized in that
In reaction system described in step (1), zinc nitrate, sodium hydroxide, dehydrated alcohol mass ratio be 1:0.5-0.7:10-15.
7. a kind of preparation method of the distributed cobalt-base catalyst of fuel cell according to claim 4, which is characterized in that
In system described in step (2), porous flake macromolecule organic polymer, nano zine oxide colloid mass ratio be 1:1.5-2.
8. a kind of preparation method of the distributed cobalt-base catalyst of fuel cell according to claim 4, which is characterized in that
The time of closed ageing described in step (3) is 12-13h.
9. a kind of preparation method of the distributed cobalt-base catalyst of fuel cell according to claim 4, which is characterized in that
In system described in step (3), porous flake high molecular polymer, cobalt nitrate mass ratio be 1:0.3-0.4.
10. a kind of preparation method of the distributed cobalt-base catalyst of fuel cell according to claim 4, feature exist
In the vacuum degree of the heat treatment of vacuum high-temperature described in step (4) is 0.1-0.3Pa, and temperature is 1500-2000 DEG C, handles 1-2h.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113582716A (en) * | 2020-12-30 | 2021-11-02 | 苏州金宏气体股份有限公司 | Cobalt-doped ZnO piezoelectric ceramic, preparation method thereof and high-purity hydrogen production |
| CN113578222A (en) * | 2021-07-12 | 2021-11-02 | 浙江大学 | Nanocomposite synthesis device based on instantaneous high-temperature Joule heating method, preparation method and application |
-
2018
- 2018-07-26 CN CN201810832498.6A patent/CN109037714A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113582716A (en) * | 2020-12-30 | 2021-11-02 | 苏州金宏气体股份有限公司 | Cobalt-doped ZnO piezoelectric ceramic, preparation method thereof and high-purity hydrogen production |
| CN113578222A (en) * | 2021-07-12 | 2021-11-02 | 浙江大学 | Nanocomposite synthesis device based on instantaneous high-temperature Joule heating method, preparation method and application |
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