CN115646506A - NiMoO 4 Synthesis method and application of loaded PtNi nanoparticles - Google Patents
NiMoO 4 Synthesis method and application of loaded PtNi nanoparticles Download PDFInfo
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- 229910002844 PtNi Inorganic materials 0.000 title claims abstract description 48
- 239000002105 nanoparticle Substances 0.000 title claims abstract description 40
- 238000001308 synthesis method Methods 0.000 title abstract description 4
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 claims abstract description 40
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 16
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- 239000000243 solution Substances 0.000 claims description 51
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 26
- 239000001257 hydrogen Substances 0.000 claims description 26
- 229910052739 hydrogen Inorganic materials 0.000 claims description 26
- 238000006243 chemical reaction Methods 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 239000008367 deionised water Substances 0.000 claims description 16
- 229910021641 deionized water Inorganic materials 0.000 claims description 16
- 238000009210 therapy by ultrasound Methods 0.000 claims description 9
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- 238000000354 decomposition reaction Methods 0.000 claims description 5
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- 230000002194 synthesizing effect Effects 0.000 claims 5
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- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 51
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
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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
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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Abstract
The invention provides a NiMoO 4 The preparation and the application of the loaded PtNi nano-particles are characterized in that good dispersion is carried out through simple stirring and ultrasound in the synthesis process, and a reducing agent sodium borohydride is rapidly added at room temperature, so that fine PtNi nano-particles are formed. The synthesis method has simple equipment requirement, rapid synthesis and no need of a stabilizer, and is a simple, convenient and green synthesis method. The nano-particle has better catalytic selectivity for the hydrolytic dehydrogenation of hydrazine hydrate, has good recoverable and recyclable performance, and can be used as a good economic catalyst.
Description
Technical Field
The invention relates to a synthetic method of PtNi nano-particles, belonging to the field of nano-materials. More specifically, it refers to NiMoO alone 4 The carrier is used for successfully loading the fine PtNi nano particles by a rapid reduction method at room temperature. The nano-particle can show good catalytic selectivity and recyclability for hydrazine hydrate, is a practical catalyst of noble metal with excellent performance, and can be applied to the field of catalysis.
Background
In the 21 st century of rapid development of industry, energy acquisition from fossil fuels such as natural gas and petroleum is the main approach of us, but the reserves of fossil fuels are limited due to non-renewable energy, and the development of new clean energy is urgent. With the increasing energy crisis and environmental pollution, the development and utilization of new energy resources are receiving social attention. As an ideal energy carrier, hydrogen has the characteristics of high energy density, no pollution of combustion products and the like. However, it is not limited toHow to safely and efficiently store and transport hydrogen is the key to the development and utilization of hydrogen energy. Hydrazine hydrate (N) 2 H 4 ·H 2 O) is a chemical hydrogen storage material with great application prospect, and has the hydrogen storage content of 8.0 wt.%, low price, stable property at room temperature and convenient transportation. In addition, because of the liquid physical property at normal temperature, the hydrazine hydrate can be directly used on the existing equipment, compared with NaBH 4 And NH 3 BH 3 And derivatives thereof are more competitive. Therefore, the development of a catalyst with high catalytic rate and high selectivity is the key of the practical production application of hydrazine hydrate. Here, the present invention prepares NiMoO through a simple chemical reduction process 4 The nano-sheet loaded PtNi bimetallic nano-catalyst is applied to the dehydrogenation of hydrazine hydrate.
Disclosure of Invention
By using sodium borohydride, ptNi nanoparticles were rapidly prepared and used for hydrogen production studies of hydrogen storage materials hydrazine hydrate. The synthesized PtNi nano-particles can be 1-10nm in size, and have high catalytic selectivity on hydrazine hydrate.
The invention provides a synthetic method of PtNi nano-particles, which comprises the following steps:
(1) Adding NiMoO into a container 4 Adding NiCl 2 ·6H 2 O and PtCl 4 Adding deionized water, performing ultrasonic treatment, and stirring uniformly;
(2) Reacting NaBH 4 Adding the aqueous solution into the step (1), reacting in an open environment, centrifuging, washing and drying the solution obtained after the reaction to obtain PtNi @ NiMoO 4 。
The NiMoO 4 、NiCl 2 ·6H 2 O and PtCl 4 The mass ratio of (1): 0.5-2.5:2-3.
Preferably, the NiMoO 4 、NiCl 2 ·6H 2 O and PtCl 4 The mass ratio of (A) to (B) is 2:1.9:2.7.
NaBH added in step (2) 4 The mass concentration of (2) is 100-250mg/ml. Preferably NaBH 4 The mass concentration of (3) is 187mg/ml.
The NiMoO 4 Is replaced by Co 3 O 4 Or ZrO 2 。
The invention also provides an application of the PtNi nano-particles prepared by the method in catalyzing decomposition of hydrazine hydrate to produce hydrogen.
The PtNi nanoparticles were used for hydrogen production kinetics of hydrogen storage material hydrazine hydrate. The research is respectively carried out from the aspects of substrate concentration, catalyst concentration, reaction temperature, different carriers, different sodium hydroxide concentrations and cycle performance. The PtNi nano-particles are used for kinetic study of decomposition hydrogen production of hydrazine hydrate, and are characterized in that a complete decomposition equation of the hydrazine hydrate is as follows:
N 2 H 4 →N 2 ↑+2H 2 ↑
the catalyst has the advantages of high decomposition activity, good cyclability, economy, simple and convenient synthesis and the like.
The prepared nano-particles can be controlled within 10nm, have high catalytic selectivity on hydrazine hydrate, and the activation energy value of the nano-particles reaches more than 52.00 KJ/mol.
Drawings
FIG. 1.PtNi/NiMoO 4 And NiMoO 4 XRD of (a).
FIG. 2.NiMoO 4 TEM images and particle size distribution of the supported PtNi nanoparticles.
FIG. 3. Influence of substrate concentration on hydrolysis kinetics.
FIG. 4. Effect of catalyst concentration on hydrolysis kinetics.
FIG. 5. Temperature effect on hydrolysis kinetics.
FIG. 6. Effect of sodium hydroxide concentration on hydrolysis kinetics.
Fig. 7.Ptni nanoparticle catalyst cycling performance test.
FIG. 8 shows the effect of PtNi nanoparticles supported on different carriers on catalytic performance.
Detailed Description
Example 1
The preparation scheme adopted by the invention comprises the following steps:
(1) A50 mL round bottom flask was charged with 200mg of NiMoO 4 Then 190mg of NiCl are added 2 ·6H 2 O and 270mg PtCl 4 Finally, 20mL of deionized water is added and stirred for 5min;
(2) Carrying out ultrasonic treatment on the solution in the step (1) for 30min;
(3) 187mg of NaBH are weighed out 4 And dissolved in 1mL of deionized water;
(4) Quickly injecting the solution in the step (3) into the solution in the step (2), and continuously and violently stirring at room temperature for 1h;
(5) Centrifuging and washing the solution obtained in the step (4), and recording the solution as PtNi @ NiMoO 4 。
As can be seen from XRD test of FIG. 1, ptNi @ NiMoO 4 Characteristic diffraction peak and NiMoO of catalyst 4 The crystal faces of Pt and Ni are consistent, and no visible peak exists, mainly because the nano particles are fine and no good crystal form is formed, so that no characteristic peak exists. Further TEM characterization of the invention has been carried out and found that fine Pt and Ni nanoparticles are indeed formed. As can be seen from FIG. 2, the dispersed morphology of the nanoparticles is located in NiMoO 4 The average particle size of the surface particles was 2.81nm.
The procedure is as in example 1, only NiMoO 4 Replacement by Fe 3 O 4 、Co 3 O 4 、ZrO 2 ZnO, or MoS 2 To obtain Fe 3 O 4 、Co 3 O 4 、ZrO 2 、ZnO、MoS 2 Supported PtNi nanoparticles; respectively marked as PtNi @ Fe 3 O 4 ， PtNi@Co 3 O 4 ，PtNi@ZrO 2 ，PtNi@ZnO、PtNi@MoS 2 。
Example 2
The method applies PtNi nano particles to the dependence of hydrogen production kinetics of hydrazine hydrate on substrate concentration, and comprises the following steps:
(1) Weighing NiMoO 4 50mg of carrier is added with magnetons, and then 7mL of deionized water is added;
(2) 1mL (0.01 mmol/mL) of Pt was aspirated 4+ Solution (PtCl) 4 ) And 1mL (0.01 mmol/mL) of Ni 2+ Solution (NiCl) 2 ·6H 2 O) adding the mixture into the step (1), and performing ultrasonic treatment for 10min;
(3) 46.8mg of NaBH are weighed out 4 And is combined withDissolving in 1mL of deionized water;
(4) Dropwise adding the solution in the step (3) into the solution in the step (2) at a constant speed, and continuously stirring at room temperature for 10min;
(5) Centrifuging and washing the solution in the step (4), and adding 4mL (0.5M) of NaOH solution to obtain a suspension;
(6) And (3) placing the suspension in a water bath kettle, wherein the rotating speed is 2400r/min, and the temperature is set to be 50 ℃. After the reactor was sealed with a plug of brine, 0.12mL, 0.18mL, 0.24mL, and 0.3 mL (0.5 mmol, 0.75mmol, 1.0mmol, and 1.25mmol, respectively) of hydrazine hydrate, respectively, were charged into the reactor and the hydrogen volume was started to record.
As shown in fig. 3, the gas yield of the catalyst for the hydrolysis of hydrazine hydrate is close to 1.5 mol when the amount of hydrazine hydrate is 0.5mmol, the gas yield of the catalyst for the hydrolysis of hydrazine hydrate is close to 2.25mol when the amount of hydrazine hydrate is 0.75mmol, the gas yield of the catalyst for the hydrolysis of hydrazine hydrate is close to 3mol when the amount of hydrazine hydrate is 1.0mmol, and the gas yield of the catalyst for the hydrolysis of hydrazine hydrate is close to 3.75mol when the amount of hydrazine hydrate is 1.25 mmol. As can be seen from the kinetic curve equation in the lower right graph, the fitted slope of the hydrolysis of hydrazine hydrate approaches 0 when the substrate concentration is increased from 0.5mmol to 1.25mmol, which indicates that the relationship between the hydrolysis reaction and the substrate concentration is zero-order reaction, and the dependence on the substrate concentration is not large.
Example 3
The hydrogen production kinetics of applying PtNi nanoparticles to hydrazine hydrate is dependent on catalyst concentration. The method comprises the following steps:
(1) Weighing NiMoO 4 Marking the carrier as 1mmol% when the carrier is 25mg, and weighing NiMoO 4 37.5mg of carrier is recorded as 1.5mmol%, and NiMoO is weighed 4 The carrier 50mg is recorded as 2mmol%, and NiMoO is weighed 4 62.5mg of the carrier is recorded as 2.5mmol%, magnetons are respectively added, and then 7mL of deionized water is added;
(2) Absorbing Pt 4+ Solution (PtCl) 4 ) 1mL (0.005 mmol/mL) and Ni 2+ Solution (NiCl) 2 ·6H 2 O) 1mL (0.005 mmol/mL) was recorded as 1mmol%, and Pt was aspirated 4+ Solution (PtCl) 4 ) 1mL (0.0075 mmol/mL) and Ni 2+ Solution (NiCl) 2 ·6H 2 O) 1mL (0.0075 mmol/mL) was recorded as 1.5mmol%, and Pt was sucked up 4+ Solution (PtCl) 4 ) 1mL (0.01 mmol/mL) and Ni 2+ Solution (NiCl) 2 ·6H 2 O) 1mL (0.01 mmol/mL) was recorded as 2mmol%, and Pt was aspirated 4+ Solution (PtCl) 4 ) 1mL (0.0125 mmol/mL) and Ni 2+ Solution (NiCl) 2 ·6H 2 O) 1mL (0.0125 mmol/mL) is recorded as 2.5mmol, and the mixture is respectively added into the step (1) and is subjected to ultrasonic treatment for 10min;
(3) Weighing 23.4mg NaBH 4 Record as 1mmol%, 35.1mg NaBH was weighed 4 Recording as 1.5mmol%, 46.8mg NaBH was weighed out 4 Record as 2mmol%, weigh 58.5mg NaBH 4 Marking as 2.5mmol%, respectively dissolving in 1mL deionized water;
(4) Dropwise adding the solution in the step (3) into the solution in the step (2) at a constant speed, and continuously stirring at room temperature for 10min;
(5) Centrifuging and washing the solution in the step (4), and adding 4mL (0.5M) of NaOH solution to obtain a suspension;
(6) The suspension is placed in a water bath kettle at the rotating speed of 2400r/min and the temperature is set to be 50 ℃. After the reactor was sealed with a plug of brine, a fixed amount of hydrazine hydrate was injected into the reactor and the recording of the hydrogen volume was started.
As shown in FIG. 4, the hydrolysis of hydrazine hydrate corresponding to each curve is fitted to a first-order curve, and it can be seen from the lower right graph that the relationship between the hydrolysis reaction and the catalyst concentration is a first-order reaction, and it can be seen from the graph that the reaction time is 20min when the catalyst concentration is 1.0 mmol%, 8min when the catalyst concentration is 1.5mmol%, 5.5min when the catalyst concentration is 2.0mmol%, and 5min when the catalyst concentration is 2.5 mmol%. According to the existing experiment and the curve in the figure, the catalyst concentration is increased, and the reaction rate is faster. The reaction time did not increase significantly as the catalyst concentration increased from 2.0mmol% to 2.5mmol%, so continued increase in catalyst concentration was stopped.
Example 4
The PtNi nano-particles are applied to the dependence of hydrogen production kinetics of hydrazine hydrate on temperature. The method comprises the following steps:
(1) Weighing NiMoO 4 50mg of carrier is added with magnetons, and then 7mL of deionized water is added;
(2) 1mL (0.01 mmol/mL) of Pt was sucked up respectively 4+ Solution (PtCl) 4 ) And 1mL (0.01 mmol/mL) of Ni 2+ Solution (NiCl) 2 ·6H 2 O) adding the mixture into the step (1), and performing ultrasonic treatment for 10min;
(3) 46.8mg of NaBH are weighed out 4 And dissolved in 1mL of deionized water;
(4) Dropwise adding the solution in the step (3) into the solution in the step (2) at a constant speed, and continuously stirring at room temperature for 10min;
(5) Centrifuging and washing the solution in the step (4), and adding 4mL (0.5M) of NaOH solution to obtain a suspension;
(6) Placing the suspension in a water bath kettle at 2400r/min and at 30/40/50/60 deg.C. After the reactor was sealed with a plug of brine, a fixed amount of hydrazine hydrate was injected into the reactor and the recording of the hydrogen volume was started.
As shown in FIG. 5, the hydrolysis reaction of hydrazine hydrate corresponding to each curve is fitted to a first order curve, and it can be seen from the lower right graph in the figure that the relationship between the hydrolysis reaction and the reaction temperature is a first order reaction, and the higher the temperature is, the faster the reaction rate is. When the reaction temperature is 303K, the reaction time is 16min and the reaction is not completely finished. When the reaction temperature is 313K, the reaction time is 12min. When the reaction temperature is 323K, the reaction time is 5.5min. When the reaction temperature is 333K, the reaction time is 3.5min. It can be seen from the figure that the reaction time is significantly reduced when the temperature is increased from 303K to 323K. When the temperature was increased from 323K to 333K, the reaction time did not change significantly, so the temperature of the reaction was stopped from increasing.
Example 5
The PtNi nano-particles are applied to the influence of hydrogen production kinetics of hydrazine hydrate on the concentration of sodium hydroxide. The method comprises the following steps:
(1) Weighing NiMoO 4 50mg of carrier is added with magnetons, and then 7mL of deionized water is added;
(2) 1mL (0.01 mmol/mL) of Pt was sucked up respectively 4+ Solution (PtCl) 4 ) And 1mL (0.01 mmol)/mL) of Ni 2+ Solution (NiCl) 2 ·6H 2 O) adding the mixture into the step (1), and performing ultrasonic treatment for 10min;
(3) 46.8mg of NaBH are weighed out 4 And dissolved in 1mL of deionized water;
(4) Dropwise adding the solution in the step (3) into the solution in the step (2) at a constant speed, and continuously stirring at room temperature for 10min;
(5) Centrifuging and washing the solution in the step (4), and respectively adding 4mL (0/0.5/1/1.5M) of NaOH solution to obtain a suspension;
(6) And (3) placing the suspension in a water bath kettle, wherein the rotating speed is 2400r/min, and the temperature is set to be 50 ℃. After the reactor was sealed with a plug of brine, hydrazine hydrate containing varying sodium hydroxide concentrations was injected into the reactor, i.e., 0.24mL of hydrazine hydrate was dissolved in 4.76mL of a solution containing 0/20/40/60mg of sodium hydroxide (noted as 0/0.5/1.0/1.5M).
As shown in fig. 6, the sodium hydroxide solution can effectively promote the hydrolysis kinetics of hydrazine hydrate, when the concentration of sodium hydroxide reaches 0.5M, the promotion effect is the greatest, and increasing the concentration thereof can inhibit the reaction rate. As can be seen from the graph, when the concentration of NaOH was 0M, the reaction hardly occurred. When the concentration of NaOH is 0.5M, the reaction rate is obviously improved and can be finished only in 5.5min. As the NaOH concentration continues to increase, the reaction rate begins to slow down. Indicating that the NaOH is saturated and begins to play an inhibiting role.
Example 6
The PtNi nano particles are applied to the hydrogen production dynamics of hydrazine hydrate for testing the cycle performance. The method comprises the following steps:
(1) Weighing NiMoO 4 Adding magnetons into 100mg of a carrier, and then adding 7mL of deionized water;
(2) 1mL (0.02 mmol/mL) of Pt was sucked up respectively 4+ Solution (PtCl) 4 ) And 1mL (0.02 mmol/mL) of Ni 2+ Solution (NiCl) 2 ·6H 2 O) adding the mixture into the step (1), and performing ultrasonic treatment for 10min;
(3) 93.6mg of NaBH are weighed out 4 And dissolved in 1mL of deionized water;
(4) Dropwise adding the solution in the step (3) into the solution in the step (2) at a constant speed, and continuously stirring at room temperature for 10min;
(5) Centrifuging and washing the solution in the step (4), and adding 4mL (0.5M) of NaOH solution to obtain a suspension;
(6) And (3) placing the suspension in a water bath kettle, wherein the rotating speed is 2400r/min, and the temperature is set to be 50 ℃. After the reactor was sealed with a plug of brine, a fixed amount of hydrazine hydrate was injected into the reactor and the recording of the hydrogen volume was started.
(7) After the reaction was complete, a further amount of hydrazine hydrate was injected into the reactor and the hydrogen volume was recorded again. This step was repeated up to 5 times.
As shown in fig. 7, as the number of times of catalysis increases, the hydrogen production rate is slightly slower, but the PtNi nanoparticle still has higher catalytic activity, and the cycling performance of the PtNi nanoparticle is good. There was no significant change in the reaction rate from the first to the third cycle. From the third post-cycle, the reaction rate decreased slightly, probably due to a slight decrease in the catalytic activity of the catalyst with increasing time. But the overall catalytic activity remains stable, which can prove the stability of the catalyst.
Example 7
The PtNi nano particles are applied to the influence of hydrogen production kinetics of hydrazine hydrate on different carriers. The method comprises the following steps:
(1) Weighing NiMoO 4 Adding magnetons into 100mg of a carrier, and then adding 7mL of deionized water;
(2) 1mL (0.02 mmol/mL) of Pt was sucked up respectively 4+ Solution (PtCl) 4 ) And 1mL (0.02 mmol/mL) of Ni 2+ Solution (NiCl) 2 ·6H 2 O) adding the mixture into the step (1), and performing ultrasonic treatment for 10min;
(3) 46.8mg of NaBH are weighed out 4 And dissolved in 1mL of deionized water;
(4) Dropwise adding the solution in the step (3) into the solution in the step (2) at a constant speed, and continuously stirring at room temperature for 10min;
(5) Centrifuging and washing the solution in the step (4), and adding 4mL (0.5M) of NaOH solution to obtain a suspension;
(6) And (3) placing the suspension in a water bath kettle, wherein the rotating speed is 2400r/min, and the temperature is set to be 50 ℃. After the reactor was sealed with a plug of brine, a fixed amount of hydrazine hydrate was injected into the reactor and the recording of the hydrogen volume was started.
As shown in FIG. 8, the carrier has important significance for PtNi nano-particles, and PtNi @ NiMoO can be seen from the catalytic activity of different carriers 4 >PtNi@ZrO 2 >PtNi@Co 3 O 4 >PtNi@MoS 2 >PtNi@ZnO>PtNi@Fe 3 O 4 。 PtNi@NiMoO 4 The main reason for the highest catalytic activity can be attributed to the strong interaction between the support and the PtNi nanoparticles. As can be seen from the figure, fe 3 O 4 When the support was used, the reaction hardly occurred, indicating that there was no interaction between the support and the metal. When ZnO and MoS 2 When used as supports, the reaction rate is slow and the reaction is not complete, indicating that the supports have weak interactions with the metal. When the carrier is Co 3 O 4 When the reaction time is 5min, but the reaction time is only half, the situation shows that the synergy between the carrier and the metal cannot be completely realized. When the support is ZrO 2 In this case, the reaction time required for completion was 8min, and although the interaction with the metal was possible, the reaction time was slightly long. When NiMoO 4 When the carrier is used as a carrier, the carrier can be completely reacted within 5.5min, and strong interaction is generated between the carrier and metal, so that the carrier is a good hydrogen evolution carrier.
Claims (7)
- A synthetic method of PtNi nano-particles is characterized by comprising the following steps:(1) Adding NiMoO into a container 4 Adding NiCl 2 ·6H 2 O and PtCl 4 Adding deionized water, performing ultrasonic treatment, and uniformly stirring;(2) Reacting NaBH 4 Adding the aqueous solution into the step (1), reacting in an open environment, centrifuging, washing and drying the solution obtained after the reaction to obtain PtNi @ NiMoO 4 。
- 2. The method for synthesizing PtNi nanoparticles according to claim 1, wherein NiMoO is used in step (1) 4 、NiCl 2 ·6H 2 O and PtCl 4 The mass ratio of (1): 0.5-2.5:2-3.
- 3. The method for synthesizing PtNi nanoparticles according to claim 1, wherein NiMoO is used in step (1) 4 、NiCl 2 ·6H 2 O and PtCl 4 The mass ratio of (1): 1.9:2.7.
- 4. the method for synthesizing PtNi nanoparticles according to claim 1, wherein NaBH added in step (2) 4 The mass concentration of (2) is 100-250mg/ml.
- 5. The method for synthesizing PtNi nanoparticles according to claim 1, wherein NaBH added in step (2) 4 The mass concentration of (3) is 187mg/ml.
- 6. The method for synthesizing PtNi nanoparticles according to any one of claims 1-5, wherein the NiMoO is 4 Is replaced by Co 3 O 4 Or ZrO 2 。
- 7. The application of the PtNi nanoparticles prepared according to any one of claims 1 to 6 in catalyzing decomposition of hydrazine hydrate to produce hydrogen.
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