CN114289032A - Preparation method and application of tungsten oxide loaded platinum-iron nano alloy catalyst - Google Patents
Preparation method and application of tungsten oxide loaded platinum-iron nano alloy catalyst Download PDFInfo
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- 239000000956 alloy Substances 0.000 title claims abstract description 72
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
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- 229910052786 argon Inorganic materials 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- DLAPQHBZCAAVPQ-UHFFFAOYSA-N iron;pentane-2,4-dione Chemical compound [Fe].CC(=O)CC(C)=O DLAPQHBZCAAVPQ-UHFFFAOYSA-N 0.000 claims description 2
- MBUJACWWYFPMDK-UHFFFAOYSA-N pentane-2,4-dione;platinum Chemical compound [Pt].CC(=O)CC(C)=O MBUJACWWYFPMDK-UHFFFAOYSA-N 0.000 claims description 2
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- MYAQZIAVOLKEGW-UHFFFAOYSA-N 4,6-dimethyldibenzothiophene Chemical compound S1C2=C(C)C=CC=C2C2=C1C(C)=CC=C2 MYAQZIAVOLKEGW-UHFFFAOYSA-N 0.000 description 3
- NICUQYHIOMMFGV-UHFFFAOYSA-N 4-Methyldibenzothiophene Chemical compound S1C2=CC=CC=C2C2=C1C(C)=CC=C2 NICUQYHIOMMFGV-UHFFFAOYSA-N 0.000 description 3
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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
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Abstract
The invention belongs to the field of preparation of catalytic materials, and discloses a preparation method and application of a tungsten oxide-loaded platinum-iron nano alloy catalyst. The catalyst is prepared by preparing the platinum-iron nano alloy by adopting a co-reduction strategy, and then loading the platinum-iron nano alloy on the tungsten oxide with modified surface by adopting an impregnation method, so that the successful preparation of the tungsten oxide loaded platinum-iron nano alloy catalyst is realized. The catalyst prepared by the invention is nontoxic and harmless, has good dispersibility and high catalytic activity, and has higher desulfurization performance on various aromatic sulfur-containing organic matters.
Description
Technical Field
The invention belongs to the field of preparation of functional catalytic materials, and particularly relates to a preparation method of a tungsten oxide supported platinum-iron nano alloy catalyst and application of the tungsten oxide supported platinum-iron nano alloy catalyst in catalytic oxidation of aromatic organic sulfur in diesel oil.
Background
With the rapid development of economy, the problem of more and more serious environmental pollution affects the production and life of people. Among them, the problem of air pollution represented by haze, acid rain, and the like is becoming serious. The main cause of haze and acid rain is the combustion of sulfur-containing organic compounds in the fuel, and therefore, the production of clean sulfur-free fuel is very important for purifying the environment. The hydrodesulfurization method widely adopted in the industry at present has excellent removal effect on most of mercaptan and thioether, but requires harsh reaction conditions for removing aromatic thiophene sulfur with large steric hindrance. Aiming at the thiophene organic sulfur which is difficult to completely remove after hydrodesulfurization, the oxidative desulfurization technology has obvious advantages. The oxidative desulfurization has the advantages of mild operation conditions, high removal efficiency of the thiophene sulfur and wide research.
In recent years, noble metal nano-catalysts have been widely developed and exhibit excellent performance in a variety of catalytic reactions. Recently, noble metal platinum (Pt) has been found to be a highly active catalytic site for removing aromatic thiophenic sulfur from fuel oil by catalytic oxidation with activated molecular oxygen (chem. Eng. J.2020,380, 122526; Ind. Eng. chem. Res.2021,60, 2828-2837). Although the Pt nano-catalyst has the capability of catalytic oxidative desulfurization, the development of the Pt nano-catalyst is still limited by the disadvantages of high price and low storage capacity in order to further develop towards industrial application. Therefore, it is of practical significance to reduce the amount of Pt used while maintaining the catalytic performance. The preparation of alloy catalysts is a very practical strategy.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a tungsten oxide supported platinum-iron nano alloy catalyst and a preparation method thereof. The catalyst takes tungsten oxide with organic matter modified surface as a carrier, and the platinum-iron nano alloy with good catalytic activity is loaded on the surface of the tungsten oxide to obtain the tungsten oxide-loaded platinum-iron nano alloy catalyst;
in the catalyst, the mass percentage of tungsten oxide modified by organic matters on the surface and the platinum-iron nano alloy is as follows: 1: 0.01-1: 0.05.
the invention also aims to utilize the tungsten oxide supported platinum-iron nano alloy catalyst as a catalyst to catalyze and oxidize polycyclic aromatic sulfides in the diesel oil so as to ensure that the sulfur content in the diesel oil reaches the national VI standard.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a preparation method of a tungsten oxide supported platinum-iron nano alloy catalyst comprises the following steps:
(1) under the conditions of no water, no oxygen and nitrogen protection, adding a certain amount of platinum source and iron source into a surfactant, heating and stirring until the platinum source and the iron source are completely dissolved to obtain a brown yellow solution; heating to a reduction temperature at a certain heating rate, switching gas flow into hydrogen-nitrogen mixed gas, carrying out co-reduction for a period of time, cooling to room temperature, precipitating the obtained platinum-iron nano alloy by using ethanol, dispersing the obtained platinum-iron nano alloy in hexane, alternately washing for multiple times, and finally dispersing the obtained platinum-iron nano alloy in hexane for preservation;
(2) adding tungsten chloride into absolute ethyl alcohol, stirring and dissolving, then adding oleylamine and oleic acid as surface modifiers, adding the obtained precursor solution into a reaction kettle, carrying out solvothermal reaction at a certain temperature, cooling to room temperature, and washing the product by using cyclohexane and ethanol alternately to obtain tungsten oxide with the surface modified with oleylamine and oleic acid long carbon chain organic molecules, namely tungsten oxide with the surface modified with organic matters;
(3) weighing a certain amount of the platinum-iron nano alloy obtained in the step (1), dispersing the platinum-iron nano alloy into a mixed solution of hexane and acetone, adding a certain amount of tungsten oxide modified by the organic matter on the surface obtained in the step (2), ultrasonically dispersing, drying, introducing an inert atmosphere, and treating at a certain temperature for a period of time to obtain the tungsten oxide supported platinum-iron nano alloy catalyst.
In the step (1), the platinum source and the iron source are respectively acetylacetone platinum and acetylacetone iron, and the molar ratio of platinum to iron is 3: 1; the surfactant is oleylamine or octadecene; the temperature of the heating and stirring is 60 ℃.
In the step (1), the heating rate is 3-5 ℃/min; the reduction temperature is 200-240 ℃; the volume fraction of hydrogen in the hydrogen-nitrogen mixed gas is 5-10%; the reduction time is 1-1.5 hours.
In the step (2), the dosage proportion of the tungsten chloride, the absolute ethyl alcohol, the oleylamine and the oleic acid is 0.1-0.2 g: 10mL of: 0.5 mL: 0.5 mL; the solvothermal reaction temperature is 160-220 ℃, and the reaction time is 12-36 hours.
In the step (3), the mass ratio of the tungsten oxide modified by the organic matter on the surface to the platinum-iron nano alloy is 1: 0.01-1: 0.05; the inert atmosphere is argon and nitrogen; the treatment temperature is 150-250 ℃, and the treatment time is 1-4 hours.
The catalyst prepared by the invention is a brown yellow powdery solid in appearance, has no obvious smell, is immiscible with water, ethanol, acetonitrile, gasoline, diesel oil and other liquids, and belongs to an environment-friendly catalyst.
The catalyst is used for activating molecular oxygen to catalyze, oxidize and remove aromatic organic sulfur in diesel oil.
The invention has the beneficial effects that:
according to the invention, the tungsten oxide modified by organic matter on the surface is used as the carrier, and the platinum-iron nano alloy with good catalytic activity is loaded on the surface of the tungsten oxide to prepare the tungsten oxide-loaded platinum-iron nano alloy catalyst, so that the problems of high price and the like of the pure platinum nano catalyst are solved.
Drawings
FIG. 1 is a transmission electron microscope image of oleylamine modified platinum-iron nano alloy under the synthesis condition of 220 ℃;
FIG. 2 is a transmission electron microscope image of octadecene-modified Pt-Fe nano alloy at 220 deg.C;
FIG. 3 is a transmission electron microscope image of oleylamine modified platinum-iron nano alloy under 240 ℃ synthesis conditions;
FIG. 4 is a diagram showing the catalytic oxidation desulfurization activity of the tungsten oxide-supported platinum-iron nano-alloy catalyst obtained in example 3 on different sulfides;
FIG. 5 is a transmission electron microscope image of octadecene-modified Pt-Fe nano-alloy at 240 deg.C;
FIG. 6 is a transmission electron microscope image of oleylamine modified platinum nanoalloy at 220 ℃ synthesis;
fig. 7 is a graph showing catalytic oxidative desulfurization activity of a tungsten oxide-supported platinum nanocatalyst for dibenzothiophene in comparison.
Detailed Description
In light of the technical gist of the present invention, the technical solution, implementation process, principle and the like will be further explained as follows to better understand the present invention. However, it is easily understood by those skilled in the art that the contents described in the embodiments are only for illustrating the present invention and should not be limited to the invention described in detail in the claims. The above-described features of the present invention and those specifically described in the examples may be combined with each other to form new or preferred embodiments.
Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
Example 1:
under the conditions of no water, no oxygen and nitrogen protection, 20mg of platinum acetylacetonate and 5mg of iron acetylacetonate are weighed, 10mL of oleylamine is added into a flask, and the mixture is heated and stirred at the temperature of 60 ℃ until the mixture is completely dissolved to obtain a brown yellow solution. Then the temperature is raised to 220 ℃ at the heating rate of 3 ℃/min, and then the airflow is switched to 10 percent H2/N2The mixed gas is reduced for 1.5 hours at 220 ℃ and then cooled to room temperature. Precipitating the obtained platinum-iron (PtFe) nano alloy by using ethanol, dispersing the obtained platinum-iron (PtFe) nano alloy by using hexane, alternately washing the obtained platinum-iron (PtFe) nano alloy for multiple times, and finally dispersing the obtained PtFe nano alloy in the hexane for storage. The transmission electron microscope of the prepared PtFe nano alloy is shown in figure 1, the PtFe nano alloy is in a nano particle shape, and each 3-4 nano particles are coupled to form a triangle or a chain.
0.2g of tungsten chloride is weighed and added into 10mL of absolute ethyl alcohol, stirred and dissolved. Then 0.5mL oleylamine and 0.5mL oleic acid were added as surface modifiers. Adding the obtained precursor solution into a reaction kettle, and carrying out solvothermal reaction for 12 hours at the temperature of 200 ℃. And cooling to room temperature, and washing the product by using cyclohexane and ethanol alternately to obtain the tungsten oxide with the organic matter modified surface.
Then, 5mg of the PtFe nanoalloy was weighed and dispersed in a mixture of 6mL of hexane and 3mL of acetone, 0.1g of tungsten oxide with surface-modified organic molecules was added, and the mixture was ultrasonically dispersed for 1 hour. Drying at 80 ℃, and treating for 4 hours at 150 ℃ in a nitrogen atmosphere to obtain the tungsten oxide supported platinum-iron nano alloy catalyst.
Example 2:
under the conditions of no water, no oxygen and nitrogen protection, 20mg of platinum acetylacetonate and 5mg of iron acetylacetonate are weighed, 10mL of octadecene is added into a flask, and the flask is heated and stirred at 60 DEG CStirring until the mixture is completely dissolved to obtain a brown yellow solution. Then the temperature is raised to 220 ℃ at the heating rate of 3 ℃/min, and then the airflow is switched to 10 percent H2/N2The mixed gas is reduced for 1.5 hours at 220 ℃ and then cooled to room temperature. Precipitating the obtained platinum-iron (PtFe) nano alloy by using ethanol, dispersing the obtained platinum-iron (PtFe) nano alloy by using hexane, alternately washing the obtained platinum-iron (PtFe) nano alloy for multiple times, and finally dispersing the obtained PtFe nano alloy in the hexane for storage. The transmission electron microscope of the prepared PtFe nano alloy is shown in figure 2. Compared with the embodiment 1, the dispersion of the PtFe nano alloy is improved by adopting octadecene as the surfactant, and the coupling phenomenon exists between every 2-3 nano particles.
0.1g of tungsten chloride is weighed and added into 10mL of absolute ethyl alcohol, stirred and dissolved. Then 0.5mL oleylamine and 0.5mL oleic acid were added as surface modifiers. Adding the obtained precursor solution into a reaction kettle, and carrying out solvothermal reaction for 36 hours at 160 ℃. And cooling to room temperature, and washing the product by using cyclohexane and ethanol alternately to obtain the tungsten oxide with the organic matter modified surface.
Then, 5mg of the PtFe nanoalloy was weighed and dispersed in a mixture of 6mL of hexane and 3mL of acetone, 0.1g of tungsten oxide with surface-modified organic molecules was added, and the mixture was ultrasonically dispersed for 1 hour. Drying at 80 ℃, and treating for 1 hour at 250 ℃ in an argon atmosphere to obtain the tungsten oxide supported platinum-iron nano alloy catalyst.
Example 3:
under the conditions of no water, no oxygen and nitrogen protection, 20mg of platinum acetylacetonate and 5mg of iron acetylacetonate are weighed, 10mL of oleylamine is added into a flask, and the mixture is heated and stirred at the temperature of 60 ℃ until the mixture is completely dissolved to obtain a brown yellow solution. Then the temperature is raised to 240 ℃ at the heating rate of 4 ℃/min, and then the airflow is switched to 10 percent H2/N2The mixed gas is reduced for 1.5 hours at 240 ℃ and then cooled to room temperature. Precipitating the obtained platinum-iron (PtFe) nano alloy by using ethanol, dispersing the obtained platinum-iron (PtFe) nano alloy by using hexane, alternately washing the obtained platinum-iron (PtFe) nano alloy for multiple times, and finally dispersing the obtained PtFe nano alloy in the hexane for storage. The transmission electron microscope of the prepared PtFe nano alloy is shown in figure 3. The PtFe nano alloy has good dispersibility, and coupling phenomenon exists between every 2-3 nano particles.
0.2g of tungsten chloride is weighed and added into 10mL of absolute ethyl alcohol, stirred and dissolved. Then 0.5mL oleylamine and 0.5mL oleic acid were added as surface modifiers. Adding the obtained precursor solution into a reaction kettle, and carrying out solvothermal reaction for 24 hours at 180 ℃. And cooling to room temperature, and washing the product by using cyclohexane and ethanol alternately to obtain the tungsten oxide with the organic matter modified surface.
Then, 5mg of the PtFe nanoalloy was weighed and dispersed in a mixture of 6mL of hexane and 3mL of acetone, 0.1g of tungsten oxide with surface-modified organic molecules was added, and the mixture was ultrasonically dispersed for 1 hour. Drying at 80 ℃, and then treating for 2 hours at 200 ℃ in an argon atmosphere to obtain the tungsten oxide supported platinum-iron nano alloy catalyst.
Dibenzothiophene (DBT), 4-methyl dibenzothiophene (4-MDBT), 4, 6-dimethyl dibenzothiophene (4,6-DMDBT) are taken as model sulfides and dissolved in decalin to obtain model oil, and the initial concentration of the sulfur content in the model oil is 500 ppm. 20mL of model oil and 0.05g of tungsten oxide-loaded platinum-iron nano alloy are taken to be placed in a reaction bottle, the reaction bottle is placed on a magnetic heating stirrer, and the reaction temperature is set to be 120 ℃. Air with a certain flow rate is introduced as an oxidant, and the stirring speed is 800 rpm. And in the reaction process, detecting the sulfur content by using an Agilent GC-7890A gas chromatograph, and calculating the desulfurization rate. The desulfurization performance is shown in fig. 4, and the removal rates of 4,6-DMDBT, DBT and 4-MDBT by the tungsten oxide supported platinum-iron nano-alloy catalyst prepared in example 3 after 2 hours of catalytic oxidation reaction respectively reach 74.0%, 29.2% and 6.6%. The time for complete catalytic oxidative removal of the 3 sulfides was 3.5 hours, 4 hours and 5 hours, respectively.
Example 4:
under the conditions of no water, no oxygen and nitrogen protection, 20mg of platinum acetylacetonate and 5mg of iron acetylacetonate are weighed, 10mL of octadecene is added into a flask, and the mixture is heated and stirred at the temperature of 60 ℃ until the mixture is completely dissolved to obtain a brown yellow solution. Then the temperature is increased to 240 ℃ at the heating rate of 3 ℃/min, and then the airflow is switched to 10 percent H2/N2The mixed gas is reduced for 1.5 hours at 240 ℃ and then cooled to room temperature. Precipitating the obtained platinum-iron (PtFe) nano alloy by using ethanol, dispersing the obtained platinum-iron (PtFe) nano alloy by using hexane, alternately washing the obtained platinum-iron (PtFe) nano alloy for multiple times, and finally dispersing the obtained PtFe nano alloy in the hexane for storage. Transmission of prepared PtFe nano alloyThe mirror is shown in figure 5. The PtFe nano alloy is in a nano particle form and has good dispersibility.
0.2g of tungsten chloride is weighed and added into 10mL of absolute ethyl alcohol, stirred and dissolved. Then 0.5mL oleylamine and 0.5mL oleic acid were added as surface modifiers. Adding the obtained precursor solution into a reaction kettle, and carrying out solvothermal reaction for 24 hours at 180 ℃. And cooling to room temperature, and washing the product by using cyclohexane and ethanol alternately to obtain the tungsten oxide with the organic matter modified surface.
Then, 5mg of the PtFe nanoalloy was weighed and dispersed in a mixture of 6mL of hexane and 3mL of acetone, 0.1g of tungsten oxide with surface-modified organic molecules was added, and the mixture was ultrasonically dispersed for 1 hour. Drying at 80 ℃, and treating at 180 ℃ for 3 hours in a nitrogen atmosphere to obtain the tungsten oxide supported platinum-iron nano alloy catalyst.
Comparative example:
under the conditions of no water, no oxygen and nitrogen protection, 20mg of platinum acetylacetonate is weighed, 10mL of oleylamine is added into a flask, and the mixture is heated and stirred at the temperature of 60 ℃ until the mixture is completely dissolved to obtain a brown yellow solution. Then the temperature is increased to 240 ℃ at the heating rate of 3 ℃/min, and then the airflow is switched to 10 percent H2/N2The mixed gas is reduced for 1.5 hours at 240 ℃ and then cooled to room temperature. And precipitating the obtained platinum nanoparticles by using ethanol, dispersing the platinum nanoparticles in hexane, alternately washing the platinum nanoparticles for multiple times, and finally dispersing the platinum nanoparticles in the hexane for storage. The transmission electron microscope of the prepared platinum nanoparticles is shown in fig. 6, which shows the morphology of nanoparticles, but coupling phenomenon exists between every 2-3 nanoparticles.
0.2g of tungsten chloride is weighed and added into 10mL of absolute ethyl alcohol, stirred and dissolved. Then 0.5mL oleylamine and 0.5mL oleic acid were added as surface modifiers. Adding the obtained precursor solution into a reaction kettle, and carrying out solvothermal reaction for 24 hours at 180 ℃. And cooling to room temperature, and washing the product by using cyclohexane and ethanol alternately to obtain the tungsten oxide with the organic matter modified surface.
Then, 5mg of platinum nanoparticles were weighed and dispersed in a mixed solution of 6mL of hexane and 3mL of acetone, 0.1g of tungsten oxide surface-modified with organic molecules was added, and ultrasonic dispersion was performed for 1 hour. Drying at 80 ℃, and treating for 2 hours at 200 ℃ in Ar atmosphere to obtain the tungsten oxide supported platinum nano catalyst. The performance of the activated molecular oxygen oxidative desulfurization agent is shown in FIG. 7. 3 hours before the reaction, the tungsten oxide supported platinum nano catalyst has poor removal rate of dibenzothiophene in fuel oil and basically has no catalytic oxidation desulfurization performance. The reaction is gradually carried out for 7 hours, so that dibenzothiophene in the fuel oil can be completely converted.
Claims (8)
1. A tungsten oxide loaded platinum-iron nano alloy catalyst is characterized in that: the catalyst takes tungsten oxide with organic matter modified surface as a carrier, and the platinum-iron nano alloy with good catalytic activity is loaded on the surface of the tungsten oxide to obtain the tungsten oxide-loaded platinum-iron nano alloy catalyst.
2. The tungsten oxide-supported platinum-iron nano-alloy catalyst according to claim 1, wherein: the mass ratio of the tungsten oxide modified by the organic matter on the surface to the platinum-iron nano alloy is as follows: 1: 0.01-1: 0.05.
3. the method for preparing a tungsten oxide supported platinum-iron nano alloy catalyst according to claim 1 or 2, comprising the steps of:
(1) under the conditions of no water, no oxygen and nitrogen protection, adding a certain amount of platinum source and iron source into a surfactant, heating and stirring until the platinum source and the iron source are completely dissolved to obtain a brown yellow solution; heating to a reduction temperature at a certain heating rate, switching gas flow into hydrogen-nitrogen mixed gas, carrying out co-reduction for a period of time, cooling to room temperature, precipitating the obtained platinum-iron nano alloy by using ethanol, dispersing the obtained platinum-iron nano alloy in hexane, alternately washing for multiple times, and finally dispersing the obtained platinum-iron nano alloy in hexane for preservation;
(2) adding tungsten chloride into absolute ethyl alcohol, stirring and dissolving, then adding oleylamine and oleic acid as surface modifiers, adding the obtained precursor solution into a reaction kettle, carrying out solvothermal reaction at a certain temperature, cooling to room temperature, and washing the product by using cyclohexane and ethanol alternately to obtain tungsten oxide with the surface modified with oleylamine and oleic acid long carbon chain organic molecules, namely tungsten oxide with the surface modified with organic matters;
(3) weighing a certain amount of the platinum-iron nano alloy obtained in the step (1), dispersing the platinum-iron nano alloy into a mixed solution of hexane and acetone, adding a certain amount of tungsten oxide modified by the organic matter on the surface obtained in the step (2), ultrasonically dispersing, drying, introducing an inert atmosphere, and treating at a certain temperature for a period of time to obtain the tungsten oxide supported platinum-iron nano alloy catalyst.
4. The method of claim 3, wherein: in the step (1), the platinum source and the iron source are respectively acetylacetone platinum and acetylacetone iron, and the molar ratio of platinum to iron is 3: 1; the surfactant is oleylamine or octadecene; the temperature of the heating and stirring is 60 ℃.
5. The method of claim 3, wherein: in the step (1), the heating rate is 3-5 ℃/min; the reduction temperature is 200-240 ℃; the volume fraction of hydrogen in the hydrogen-nitrogen mixed gas is 5-10%; the reduction time is 1-1.5 hours.
6. The method of claim 3, wherein: in the step (2), the dosage proportion of the tungsten chloride, the absolute ethyl alcohol, the oleylamine and the oleic acid is 0.1-0.2 g: 10mL of: 0.5 mL: 0.5 mL; the solvothermal reaction temperature is 160-220 ℃, and the reaction time is 12-36 hours.
7. The method of claim 3, wherein: in the step (3), the mass ratio of the tungsten oxide modified by the organic matter on the surface to the platinum-iron nano alloy is 1: 0.01-1: 0.05; the inert atmosphere is argon and nitrogen; the treatment temperature is 150-250 ℃, and the treatment time is 1-4 hours.
8. The application of the tungsten oxide supported platinum-iron nano alloy catalyst of claim 1 in the catalytic oxidation removal of aromatic organic sulfur in diesel oil by activated molecular oxygen.
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