CN112151815A - PdZn alloy nano catalyst applied to ethanol fuel cell - Google Patents
PdZn alloy nano catalyst applied to ethanol fuel cell Download PDFInfo
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1009—Fuel cells with solid electrolytes with one of the reactants being liquid, solid or liquid-charged
- H01M8/1011—Direct alcohol fuel cells [DAFC], e.g. direct methanol fuel cells [DMFC]
- H01M8/1013—Other direct alcohol fuel cells [DAFC]
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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
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
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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 invention discloses a PdZn alloy nano catalyst applied to an ethanol fuel cell, and belongs to the technical field of electrocatalysis. The method utilizes palladium acetylacetonate and zinc chloride as precursors to synthesize the PdAu alloy nano material with the super-dendritic structure by a simple one-step hydrothermal method in the atmosphere of a mixed gas of hydrogen and carbon monoxide. Compared with commercial Pt/C with the mass fraction of 20%, the PdZn alloy nano material prepared by the invention has the oxygen reduction performance and the ethanol oxidation performance which are far greater than those of the commercial Pt/C, and the stability performance which is superior to that of the commercial Pt/C. The method is simple to operate, strong in controllability and certain in universality.
Description
Technical Field
The invention relates to a PdZn alloy nano catalyst applied to an ethanol fuel cell, belonging to the technical field of electrocatalysis.
Background
In recent years, environmental and energy problems have been increasingly emphasized by countries around the world as a large amount of non-renewable fossil energy is consumed. According to incomplete statistics, the traditional fossil energy can supply human for no more than one hundred years at most, and natural disasters such as climate warming, glacier thawing, flood abuse and the like caused by rapid rise of harmful gases such as carbon dioxide, sulfide, nitride and the like in the atmosphere due to the use of the fossil energy indicate uncertainty and abnormality of global environmental change. Therefore, the design and development of a novel, sustainable, clean and efficient energy form are of great significance for reducing the use of fossil energy, reducing the emission of harmful gases and coping with global environmental changes.
Fuel cells are one of the most efficient devices for directly converting chemical energy (e.g., ethanol, methanol, hydrogen, formic acid, etc.) contained in small fuel molecules into electrical energy. Among various fuel cells, ethanol fuel cells have received extensive attention and research from numerous researchers due to the characteristics of easy storage, wide sources, poisoning resistance, cleanliness, high energy density, and the like of ethanol. Meanwhile, the electrocatalytic oxidation process of ethanol in a fuel cell involves a multi-electron reaction process, and therefore, the selection of a catalyst has important significance for completely oxidizing ethanol molecules. Among the catalysts, the platinum-based catalyst is considered to be the catalyst with the best catalytic activity for ethanol oxidation and oxygen reduction, but due to its scarcity, the slow kinetics of the cathode oxygen reduction reaction, and the tendency to generate acids and aldehydes as intermediates in the catalytic process of ethanol oxidation, the large-scale commercial application of platinum-based materials in ethanol fuel cells is seriously hindered. For the present time, the development of highly efficient non-platinum based materials has a significant driving role in the development of ethanol fuel cells. The metal palladium (Pd) has similar physicochemical properties with the metal platinum (Pt), and compared with the platinum, the metal palladium (Pd) has richer storage capacity, relatively cheaper price and strong CO poisoning resistance. If the palladium-based material is used instead of the platinum-based material, the consumption of platinum can be reduced, and the development of the ethanol fuel cell can be promoted to a certain extent. However, with respect to the metal palladium nanocatalyst alone, unsatisfactory catalytic performance is exhibited in the cathode and anode portions of the fuel cell due to its inherent electronic structural defectivity. Numerous studies have shown that alloying is an effective measure for increasing the activity of the catalyst. Wang et al prepared PdPb nanoparticles by using sodium citrate as a regulator and low-solubility sodium borohydride as a reducing agent, showed excellent ethanol oxidation performance, but hardly showed the oxygen reduction activity of a cathode; li et al, by modifying the P element on the surface of the PdNi nanoparticles, significantly improved the mass activity of ethanol, but did not exhibit oxygen reduction activity.
Disclosure of Invention
[ problem ] to provide a method for producing a semiconductor device
The existing noble metal catalyst is difficult to simultaneously show excellent electrocatalytic performance at the cathode and the anode of the fuel cell.
[ technical solution ] A
In order to solve the problems, the invention provides a PdZn alloy nano catalyst and a preparation method thereof, the method has simple process and lower cost, and the prepared PdZn alloy nano material has excellent activity of an oxidation source, stability and ethanol oxidation activity. The half-wave potential exhibited under alkaline conditions was 0.91V, much higher than that of commercial Pt/C (0.843V), and showed signs of fading after 15000 cycles. In addition, the excellent ethanol oxidation activity is also shown, and the mass activity is 3.45A mg-1Commercial platinum-carbon (1.12A mg)-1) 3.08 times of the total amount of the fuel, and can be applied to the field of ethanol fuel cells.
The invention provides a method for preparing a PdZn alloy nano catalyst, which comprises the steps of taking palladium acetylacetonate and zinc chloride as precursors, taking oil ammonia as a solvent, uniformly mixing, introducing a regulating gas, carrying out hydrothermal reaction, and carrying out solid-liquid separation after the reaction is finished to obtain the PdZn alloy nano catalyst.
In one embodiment of the present invention, the control gas is carbon monoxide, hydrogen, nitrogen or a mixed gas of carbon monoxide and hydrogen.
In one embodiment of the present invention, the control gas is a mixed gas of carbon monoxide and hydrogen.
In one embodiment of the present invention, the mass ratio of palladium acetylacetonate to zinc chloride is 1: (1.10-1.51).
In one embodiment of the present invention, the mass ratio of palladium acetylacetonate to zinc chloride is 1: 1.47.
in one embodiment of the present invention, the hydrothermal reaction temperature is 155-165 ℃ and the reaction time is 1.5-3 h.
In one embodiment of the invention, the hydrothermal reaction temperature is 162 ℃ and the reaction time is 2.5 h.
In one embodiment of the present invention, the solid-liquid separation comprises the following steps: adding absolute ethyl alcohol into the suspension, and then centrifuging to obtain the target product.
In an embodiment of the present invention, the method specifically includes the following steps:
1) adding palladium acetylacetonate, zinc chloride and ammonium bromide into oil ammonia, and stirring to form a solution;
3) adding the solution obtained in the step 1) into a reaction kettle, adding a regulating gas, heating to 155-165 ℃ for reaction for 1.5-3 h, cooling to obtain a suspension, and performing solid-liquid separation on the suspension to obtain a solid, namely the PdZn alloy nano catalyst.
The invention provides the PdZn alloy nano catalyst prepared by the method.
The invention provides a fuel cell cathode and anode material and a fuel cell driving device containing the PdZn alloy nano catalyst.
In one embodiment of the invention, the fuel cell powered device includes electric bicycles, electric automobiles, and other devices powered by ethanol fuel cells.
In one embodiment of the invention, the cathode and anode materials are prepared by loading PdZn alloy nano-catalyst on carbon powder.
The invention provides an application of the PdZn alloy nano catalyst in the field of ethanol fuel cells.
[ advantageous effects ]:
(1) the PdZn alloy nano-catalyst can be prepared by a simple one-step hydrothermal method, and the method is simple to operate and high in controllability.
(2) The PdZn nano material prepared by the invention utilizes the alloying of the zinc simple substance and the palladium, thereby obviously improving the catalytic performance and the stability of the catalyst, the catalytic performance and the stability of the catalyst are superior to those of commercial Pt/C, and especially when the regulated gas is the mixed gas of carbon monoxide and hydrogen, the prepared PdZn nano particles show excellent oxygen reduction catalytic performance and ethanol oxidation performance. After 15000 cycles, the activity of the oxygen reduction catalyst is attenuated; the ethanol oxidation activity was still superior to commercial platinum carbon at a potential of 0.81V (relative to a standard hydrogen electrode) for a relative current of 2000 s.
Drawings
FIG. 1 is a transmission electron micrograph of PdZn NDs, PdZn NSs, PdZn NPs prepared in examples 1-3; wherein (a) is PdZn NDs, (b) is PdZn NSs, and (c) is PdZn NPs.
FIG. 2 shows the X-ray diffraction pattern of PdZn NDs prepared in example 1.
FIG. 3 is a STEM-EDX line scan analysis of PdZn NDs prepared in example 1.
FIG. 4 is a graph of the electron transfer numbers of PdZn NDs and commercial platinum carbon prepared in example 1.
FIG. 5 is a plot of cyclic voltammograms of ethanol oxidation of PdZn NDs, PdZn NSs, PdZn NPs and commercial Pt/C prepared in examples 1-3.
FIG. 6 is an oxygen reduction polarization curve of PdZn NDs, PdZn NSs, PdZn NPs and commercial Pt/C prepared in examples 1-3.
FIG. 7 shows the results of the oxidation stability tests of PdZn NDs prepared in example 1 and commercial Pt/C ethanol.
FIG. 8 shows the results of the PdZn NDs and commercial Pt/C oxygen reduction stability tests prepared in example 1.
Fig. 9 is a transmission electron micrograph of the material prepared in comparative example 1.
FIG. 10 shows the cyclic voltammograms and oxygen reduction polarization curves of the ethanol oxidation of PdZn NDs-1, PdZn NDs-2, PdZn NDs-3 and PdZn NDs-4 obtained in examples 4 to 7.
Detailed Description
For a better understanding of the present invention, the following examples are included to further illustrate the present invention, but the present invention is not limited to the examples given below.
[ example 1 ]
The preparation method of the branched PdZn nano material comprises the following specific steps:
(1) taking 20.0mg of palladium acetylacetonate and 136 mu L (100mg/mL) of zinc chloride solution as precursors, adding 43.6mg of ammonium bromide into a glass reagent bottle filled with 5mL of oil ammonia solvent, and stirring to form a uniform solution;
(2) adding the obtained uniform solution into a reaction kettle, and simultaneously, placing a reaction kettle containing 9.6mg of MO (CO)6Introducing 0.25MPa hydrogen as a CO source, heating by using an oil bath pan, raising the temperature to 162 ℃, preserving the heat for 2.5 hours, cooling to room temperature to obtain black gelatinous suspension, adding ethanol into the suspension, and centrifuging to obtain the final dendritic PdZn nano material named as PdZn NDs.
[ example 2 ]
The preparation method of the flaky PdZn nano material comprises the following specific steps:
(1) taking 20mg of palladium acetylacetonate and 136 mu L (100mg/mL) of zinc chloride solution as precursors, adding 43.6mg of ammonium bromide into a glass reagent bottle filled with 5mL of oil ammonia solvent, and stirring to form a uniform solution;
(2) adding the obtained uniform solution into a reaction kettle, and simultaneously, placing a reaction kettle containing 9.6mg of MO (CO)6Heating the mixture by using an oil bath pan as a CO source, raising the temperature to 162 ℃, keeping the temperature for 2.5 hours, then cooling the mixture to room temperature to obtain black gelatinous suspension, adding ethanol into the suspension, and then centrifuging the suspension to obtain the final flaky PdZn nano material named as PdZn NSs.
[ example 3 ]
The preparation method of the granular PdZn nano material comprises the following specific steps:
(1) taking 20.0mg of palladium acetylacetonate and 136 mu L (100mg/mL) of zinc chloride solution as precursors, adding 43.6mg of ammonium bromide into a glass reagent bottle filled with 5mL of oil ammonia solvent, and stirring to form a uniform solution;
(2) adding the obtained uniform solution into a reaction kettle, introducing 0.25MPa of nitrogen, heating by using an oil bath pan, heating to 162 ℃, preserving heat for 2.5 hours, then cooling to room temperature to obtain black gelatinous suspension, adding ethanol into the suspension, and centrifuging to obtain the final granular PdZn nano material, wherein the name is PdZn NPs.
Morphology characterization and Performance testing
Transmission electron microscope images are taken of the nano-materials prepared in the examples 1-3, and the images a, b and c in the figure 1 are respectively transmission electron microscope images of the micro-morphologies of the PdZn NDs, PdZn NSs and PdZn NPs prepared in the examples 1-3, and from the transmission electron microscope images, the transmission electron microscope images can respectively obtain the super-dendritic, flaky and granular PdZn nano-materials by adjusting different gas atmospheres.
XRD test is carried out on the PdZn NDs nano-material prepared in the example 1, fig. 2 shows the X-ray diffraction pattern of the PdZn NDs, phase information of the PdZn NDs can be obtained from diffraction peaks of the PdZn NDs, and the diffraction peaks are not positioned at the positions of Pd and Zn simple substances from appearing main diffraction peaks, which shows that a well-dispersed PdZn alloy phase is formed.
FIG. 3 is a STEM-EDX linear scan analysis chart of PdZn NDs obtained by STEM-EDX line scan test, from which it can be seen that Pd atoms and Zn atoms have signals of the same frequency. Further indicating that PdZn alloy was formed.
Under alkaline conditions, PdZn alloy mainly performs four-electron oxygen reduction reaction (1) O in the cathode part2(g)+*→O2*；(2)O2*+H2O(l)+e-→OOH*+OH；(3)OOH*+e-→O*+OH-；(4)O*+H2O(l)+e-→OH*+OH-；(5)OH*+e-→OH-+. represents the active site. Whereas for the anode part, the ethanol molecules mainly undergo the following reactions on the catalyst surface:
FIG. 4 shows the electron transfer number calculated by the K-L equation during the catalysis of the PdZn NDs alloy nanomaterial prepared in example 1:
the K-L equation is:
wherein the content of the first and second substances,
j is the measured current density, JLIs a limiting current density, JKFor the kinetic current density, ω is the rotation rate of the working electrode, n is the number of transferred electrons, F is the Faraday constant (96485℃ mol-)1)，C0The solubility of oxygen in 0.1mol/L KOH solution (1.2X 10)-6mol·cm-3) D is the diffusion coefficient of oxygen in 0.1mol/L KOH solution, and gamma is the dynamic viscosity of the electrolyte (0.01 cm)2·s-1)。
Compared with the commercial Pt/C with the mass fraction of 20%, the material prepared in the example 1 can transfer about 4 electrons as the commercial Pt/C, which shows that the material undergoes a four-electron path in the catalytic process, and almost no other harmful intermediate products are generated, thereby being beneficial to improving the catalytic efficiency of the fuel cell.
FIG. 5 is a graph showing the results of the reaction at 1M KOH +1M CH3CH2The sweep rate in solution of OH was 50mV s-1(voltage range 0.10V-1.26V (relative to standard hydrogen electrode)) of the tested PdZn NDs, PdZn NSs, PdZn NPs and commercial Pt/C cyclic voltammetry curves, as can be seen from the figure, the PdZn NDs have the largest ethanol oxidation peak, and the mass activity of the PdZn NDs is 3.45A mg-1Commercial platinum-carbon (1.12A mg)-1) 3.08 times of that of PdThe mass activity of Zn NSs and PdZn NPs is 1.54A mg-1And 1.26A mg-1It shows that PdZn NDs have excellent ethanol oxidation activity.
FIG. 6 is a sweep of 10mV s at a spin rate of 1600rpm/min in an oxygen saturated 0.1M KOH solution by a rotating disk electrode assembly-1Compared with the mass fraction of 20% of commercial Pt/C, the polarization curves of PdZn NDs, PdZn NSs, PdZn NPs and commercial Pt/C tested in the test process can find that the PdZn NDs and PdZn NSs have a larger half-wave potential than the commercial Pt/C, (the half-wave potential can qualitatively analyze the electrocatalytic oxygen reduction activity of the material, and the larger the half-wave potential is, the catalytic activity of the material is shown), particularly, the half-wave potential of the PdZn NDs is 0.91V and is far greater than the commercial Pt/C, and the catalysts are shown to have higher activity than the commercial Pt/C. This is probably because their unique super-dendritic structure and alloy effect can regulate and control the adsorption energy between intermediate product and catalyst, thus greatly improving their oxygen reduction catalytic activity.
FIG. 7 shows the oxygen reduction stability data of the PdZn NDs alloy nano-material prepared in example 1 and a commercial Pt/C electrode, respectively, and it can be found that the PdZn NDs alloy nano-material prepared in the invention shows excellent stability, and the sweep rate of the PdZn NDs alloy nano-material in an oxygen-saturated 0.1M KOH solution is 200mV s-1The polarization curve after 15000 cycles (voltage range 0.6V-1.0V versus standard reversible hydrogen electrode) shows weak attenuation, while for commercial Pt/C, after 15000 cycles, obvious attenuation appears.
FIG. 8 is an i-t curve of the PdZn NDs alloy nano-material prepared in example 1 and commercial Pt/C at a voltage of 0.80V (relative to a standard hydrogen electrode), and the final current of the PdZn NDs is larger than that of commercial platinum carbon after 2000 seconds, which shows that the PdZn NDs have excellent stability in an ethanol environment.
[ example 4 ]
(1) Taking 20.0mg of palladium acetylacetonate and 160 mu L (100mg/mL) of zinc chloride solution as precursors, adding 43.6mg of ammonium bromide into a glass reagent bottle filled with 5mL of oil ammonia solvent, and stirring to form a uniform solution;
(2) adding the obtained uniform solution into a reaction kettle, introducing 0.25MPa hydrogen, heating by using an oil bath pan, heating to 162 ℃, preserving heat for 2.5 hours, then cooling to room temperature to obtain black gelatinous suspension, adding ethanol into the suspension, and centrifuging to obtain the PdZn nano material with similar morphology, wherein the name is PdZn NDs-1.
[ example 5 ]
(1) Taking 20.0mg of palladium acetylacetonate and 180 mu L (100mg/mL) of zinc chloride solution as precursors, adding 43.6mg of ammonium bromide into a glass reagent bottle filled with 5mL of oil ammonia solvent, and stirring to form a uniform solution;
(2) adding the obtained uniform solution into a reaction kettle, introducing 0.25MPa hydrogen, heating by using an oil bath pan, heating to 162 ℃, preserving heat for 2.5 hours, then cooling to room temperature to obtain black gelatinous suspension, adding ethanol into the suspension, and centrifuging to obtain PdZn nano material with similar morphology, wherein the name is PdZn NDs-2
[ example 6 ]
(1) Taking 20.0mg of palladium acetylacetonate and 136 mu L (100mg/mL) of zinc chloride solution as precursors, adding 43.6mg of ammonium bromide into a glass reagent bottle filled with 5mL of oil ammonia solvent, and stirring to form a uniform solution;
(2) adding the obtained uniform solution into a reaction kettle, introducing 0.25MPa hydrogen, heating by using an oil bath pan, heating to 165 ℃, preserving heat for 2.5 hours, then cooling to room temperature to obtain black gelatinous suspension, adding ethanol into the suspension, and centrifuging to obtain the PdZn nano material with similar morphology, wherein the name is PdZn NDs-3.
[ example 7 ]
(1) Taking 20.0mg of palladium acetylacetonate and 136 mu L (100mg/mL) of zinc chloride solution as precursors, adding 43.6mg of ammonium bromide into a glass reagent bottle filled with 5mL of oil ammonia solvent, and stirring to form a uniform solution;
(2) adding the obtained uniform solution into a reaction kettle, introducing 0.25MPa hydrogen, heating by using an oil bath pan, heating to 160 ℃, preserving heat for 2.5 hours, then cooling to room temperature to obtain black gelatinous suspension, adding ethanol into the suspension, and centrifuging to obtain the PdZn nano material with similar morphology, wherein the name is PdZn NDs-4.
FIG. 10 shows the cyclic voltammetry curves and oxygen reduction polarization curves for ethanol oxidation of PdZn NDs-1, PdZn NDs-2, PdZn NDs-3 and PdZn NDs-4 obtained in examples 4 to 7, respectively. As can be seen from the figure, when the content of the zinc chloride precursor in the examples 4 and 5 is increased, the ethanol oxidation activity of the PdZn NDs-1 and PdZn NDs-2 nanocrystals is reduced, and the oxygen reduction activity is not obviously changed. In examples 6 and 7, the ethanol oxidation activity and oxygen reduction activity of the PdZn NDs-3 and PdZn NDs-4 nanocrystals were not significantly changed when the reaction temperature was changed.
Comparative example 1
When the reaction system was not charged with the control gas and the other steps and conditions were the same as those in example 1, a material was prepared.
FIG. 9 is a transmission electron micrograph of a comparative example, and when other steps and conditions were the same as those in example 1, a material was prepared. The appearance of the material is rice-grain-shaped, which shows that proper gas regulation and control have important significance on the appearance structure of the material.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The method for preparing the PdZn alloy nano catalyst is characterized in that palladium acetylacetonate and zinc chloride are used as precursors, oil ammonia is used as a solvent, a regulating gas is introduced after uniform mixing, hydrothermal reaction is carried out, and solid-liquid separation is carried out after the reaction is finished to obtain the PdZn alloy nano catalyst.
2. The method of claim 1, wherein the conditioning gas is carbon monoxide, hydrogen, nitrogen, or a mixture of carbon monoxide and hydrogen.
3. The method of claim 1, wherein the conditioning gas is a mixture of carbon monoxide and hydrogen.
4. The method according to claim 1, wherein the mass ratio of palladium acetylacetonate to zinc chloride is 1: (1.10-1.51).
5. The method according to claim 1, wherein the hydrothermal reaction temperature is 155 to 165 ℃ and the reaction time is 1.5 to 3 hours.
6. The method according to claim 1, characterized in that it comprises in particular the steps of:
1) adding palladium acetylacetonate, zinc chloride and ammonium bromide into oil ammonia, and stirring to form a solution;
2) adding the solution obtained in the step 1) into a reaction kettle, adding a regulating gas, heating to 155-165 ℃ for reaction for 1.5-3 h, cooling to obtain a suspension, and performing solid-liquid separation on the suspension to obtain a solid, namely the PdZn alloy nano catalyst.
7. The PdZn alloy nano-catalyst prepared by the method of any one of claims 1 to 6.
8. Use of the PdZn alloy nanocatalyst as claimed in claim 7 in fuel cell cathode and anode materials, fuel cell drive equipment.
9. Use according to claim 8, wherein the fuel cell powered device comprises electric bicycles, electric cars and other devices powered by ethanol fuel cells.
10. The use according to claim 8, wherein the fuel cell cathode and anode materials are prepared by loading PdZn alloy nanocatalysts on carbon powder.
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| CN114094130A (en) * | 2021-11-30 | 2022-02-25 | 郑州大学 | Preparation method of fuel cell platinum alloy catalyst |
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