CN108686677B - Preparation method and application of nano catalytic material with palladium oxide shell-nickel oxide core structure - Google Patents
Preparation method and application of nano catalytic material with palladium oxide shell-nickel oxide core structure Download PDFInfo
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- 229910003445 palladium oxide Inorganic materials 0.000 title claims abstract description 39
- 229910000480 nickel oxide Inorganic materials 0.000 title claims abstract description 34
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 26
- 239000000463 material Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- JQPTYAILLJKUCY-UHFFFAOYSA-N palladium(ii) oxide Chemical compound [O-2].[Pd+2] JQPTYAILLJKUCY-UHFFFAOYSA-N 0.000 title claims description 35
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 84
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims abstract description 65
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000011246 composite particle Substances 0.000 claims abstract description 48
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 48
- 229910052751 metal Inorganic materials 0.000 claims abstract description 44
- 239000002184 metal Substances 0.000 claims abstract description 44
- 239000002245 particle Substances 0.000 claims abstract description 37
- 229910052763 palladium Inorganic materials 0.000 claims abstract description 34
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000243 solution Substances 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 15
- 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 description 14
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 claims description 14
- GPNDARIEYHPYAY-UHFFFAOYSA-N palladium(ii) nitrate Chemical compound [Pd+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O GPNDARIEYHPYAY-UHFFFAOYSA-N 0.000 claims description 10
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 claims description 9
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 7
- 230000001590 oxidative effect Effects 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000010907 mechanical stirring Methods 0.000 claims description 6
- 239000001509 sodium citrate Substances 0.000 claims description 6
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims description 6
- 239000008139 complexing agent Substances 0.000 claims description 5
- 229910001453 nickel ion Inorganic materials 0.000 claims description 5
- 239000007800 oxidant agent Substances 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 229910017604 nitric acid Inorganic materials 0.000 claims description 3
- VEQPNABPJHWNSG-UHFFFAOYSA-N Nickel(2+) Chemical compound [Ni+2] VEQPNABPJHWNSG-UHFFFAOYSA-N 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 239000011943 nanocatalyst Substances 0.000 claims 1
- 239000003054 catalyst Substances 0.000 abstract description 6
- -1 palladium ions Chemical class 0.000 abstract description 6
- 229910000510 noble metal Inorganic materials 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 239000011247 coating layer Substances 0.000 abstract description 2
- 238000000151 deposition Methods 0.000 abstract description 2
- MUJIDPITZJWBSW-UHFFFAOYSA-N palladium(2+) Chemical compound [Pd+2] MUJIDPITZJWBSW-UHFFFAOYSA-N 0.000 abstract description 2
- HBEQXAKJSGXAIQ-UHFFFAOYSA-N oxopalladium Chemical compound [Pd]=O HBEQXAKJSGXAIQ-UHFFFAOYSA-N 0.000 abstract 4
- 150000004706 metal oxides Chemical class 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 6
- 238000000746 purification Methods 0.000 description 6
- 230000006872 improvement Effects 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 150000002940 palladium Chemical class 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/89—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals
- B01J23/892—Nickel and noble metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- B01J35/398—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/12—Oxidising
Abstract
The invention provides a preparation method of a nano catalytic material with a palladium oxide shell-nickel oxide core structure, which comprises the steps of firstly preparing nano metal nickel particles, then reducing palladium ions by metal nickel in a palladium ion solution through the replacement reaction of the surface of the nickel particles and palladium ions by utilizing the property that the potential of a metal palladium electrode is higher than that of the metal nickel, and depositing the palladium ions on the surface of the nickel particles to form a metal palladium coating layer with the thickness of nano magnitude, thereby obtaining the nano metal palladium-nickel composite particles with the palladium shell-nickel core structure. In glycerol, nano metallic palladium-nickel composite particles having a palladium shell-nickel core structure are oxidized with ozone into nano oxide composite particles having a palladium oxide shell-nickel oxide core structure, which can be used as a catalyst material for motor vehicle exhaust. The invention prepares the nanometer noble metal oxide composite particle with the palladium oxide shell-nickel oxide core structure to replace the palladium oxide particle used in the current motor vehicle tail gas catalytic purifier.
Description
Technical Field
The invention provides a preparation method of a nano catalytic material with a palladium oxide shell-nickel oxide core structure, belonging to the field of lighter detection and debugging equipment.
Background
The palladium oxide is a motor vehicle exhaust catalytic purification material with excellent performance. At present, in the preparation of catalytic purification materials for automobile exhaust, a certain amount of palladium salt is added into slurry (also called water washing slurry, english washcoat) prepared by mixing and ball-milling a powder type coating material and water, and is coated on the surface of dense small channels of a catalyst carrier (generally, a honeycomb ceramic carrier or a metal honeycomb carrier), and then the carrier coated with the catalyst is heated, roasted and molded. During sintering, the palladium salt in the slurry is calcined and oxidized to convert the submicron or micron palladium oxide particles which are attached to the coating material on the surface of the catalyst carrier and have catalytic action. The palladium oxide particles used as the catalytic material for purifying the tail gas of the motor vehicle mainly have palladium atoms on the surfaces of the particles participating in catalytic reaction in the catalytic process, and the palladium atoms at the core of the particles generally do not participate in the catalytic reaction because the palladium atoms cannot contact tail gas molecules, so that the effective utilization rate of palladium in a tail gas purifier of the motor vehicle in the tail gas purifying and catalyzing process is reduced. Therefore, the inventor proposes a method for preparing nano palladium oxide in the prior invention patent (ZL 201310272768. X), so that the change of chemical forms can not occur in the processes of adding catalyst water washing slurry and roasting and forming, and the available specific surface area of the palladium oxide is improved. Meanwhile, the invention discloses a method for preparing the nano hollow palladium oxide, which further improves the specific surface area of the available palladium oxide and reduces the required amount of the palladium oxide on the premise of ensuring the same specific surface area. However, it was found that the efficiency was lowered at a high temperature (1000 ℃ C.) during use, and there was a possibility that thermal collapse occurred due to insufficient strength of the hollow structure. The invention aims to overcome the defects of the two technologies, and the nickel core is manufactured to be used as the inner core of the nano palladium oxide, so that the strength of the nano particles is enhanced, and the available specific surface area of the nano palladium oxide is greatly improved. The aim is to further improve the effective utilization rate of palladium in the motor vehicle exhaust purifier on the premise of meeting the national motor vehicle exhaust emission standard, thereby reducing the use amount of noble metal palladium and reducing the production cost of the motor vehicle exhaust catalytic purifier.
Disclosure of Invention
The invention aims to prepare a nano-oxide composite particle which is formed by coating nickel oxide particles (namely, has a palladium oxide shell-nickel oxide core structure) with palladium oxide and can be used for catalytic purification of motor vehicle exhaust. Because the core part of the nano-oxide composite particle with the palladium oxide shell-nickel oxide core structure is nickel oxide, when the nano-oxide composite particle is used as a motor vehicle exhaust catalytic purification material, compared with the solid palladium oxide particle used in the existing motor vehicle exhaust purification catalytic coating, the nano-oxide composite particle can reduce the consumption of noble metal palladium under the condition of the same motor vehicle exhaust purification effect, improve the effective utilization rate of palladium and reduce the production cost of a motor vehicle exhaust catalytic purifier.
In order to achieve the purpose, the invention adopts the following technical scheme.
The preparation of the nano-oxide composite particle with the palladium oxide shell-nickel oxide core structure is realized by the following technical approaches.
A preparation method of a nano catalytic material with a palladium oxide shell-nickel oxide core structure comprises the following steps:
the first step is as follows: preparing metal nickel particles;
the second step is that: coating palladium metal outside the metal nickel particles to prepare nano metal palladium-nickel composite particles with a palladium shell-nickel core structure;
the third step: and (2) taking glycerol as a carrier liquid of the nano metal palladium-nickel composite particles, heating the glycerol to more than 250 ℃, and taking ozone as an oxidant to prepare the nano oxide composite particles with the palladium oxide shell-nickel oxide core structure.
In a further improvement, the method for preparing the metallic nickel particles in the first step comprises the following steps: preparing 1000ml of nickel sulfate solution with the concentration of 0.5mol/l, and adding a complexing agent sodium citrate according to the molar ratio of nickel sulfate to sodium citrate = 1: 2; 500ml of hydrazine hydrate is taken and NH is added4OH adjusting the pH value of a hydrazine hydrate solution to 11; at room temperature, under the conditions of mechanical stirring and ultrasonic vibration, hydrazine hydrate and NH are mixed4And pouring the OH mixed solution into a nickel sulfate solution to react for 5 minutes, so that hydrazine hydrate reduces the nickel ion nano metal nickel particles.
In a further improvement, the nickel particles have an average particle size of 200 nm.
In a further improvement, the second step comprises the steps of: preparing 1000ml of palladium nitrate solution with the concentration of 0.2mol/l, and adding nitric acid to adjust the pH value of the palladium nitrate solution to 3; and under the conditions of room temperature and mechanical stirring, washing the nickel particles by using deionized water, and then adding the washed nickel particles into a palladium nitrate solution to react for 20 minutes to obtain the nano metal palladium-nickel composite particles with the palladium shell-nickel core structure.
In the third step, the heating temperature of the glycerol is 275-285 ℃.
In a further improvement, the ozone is introduced at a rate of 1 liter per minute.
The nanometer catalytic material with the palladium oxide shell-nickel oxide core structure prepared by the preparation method is used for purifying the tail gas of the motor vehicle.
Specifically, the preparation method of the nano catalytic material with the palladium oxide shell-nickel oxide core structure comprises the following steps:
the first step is as follows: preparing nickel ion solution and adding a certain amount of complexing agent. Adding a certain amount of alkaline solution into a reducing agent hydrazine hydrate to adjust the pH value to be strong alkaline. And mixing the nickel ion solution and the hydrazine hydrate solution to prepare the nano-scale metallic nickel particles.
The second step is that: preparing palladium ion solution and adding a certain amount of complexing agent. Putting the prepared nickel particles in acidity, and utilizing the property that the potential of a metal palladium electrode is higher than that of a metal nickel electrode, through a displacement reaction between nickel atoms on the surface of the nickel particles and palladium ions in the solution, reducing the palladium ions in the solution by metal nickel and depositing the palladium ions on the surface of the nickel particles to form a metal palladium coating layer with the thickness of nanometer order, thereby preparing the nanometer metal palladium-nickel composite particles with the palladium shell-nickel core structure.
The third step: oxidizing the nanometer metal palladium shell-nickel core composite particles by using an oxidant to convert the nanometer metal palladium shell-nickel core composite particles into nanometer palladium oxide shell-nickel oxide core composite particles. In contrast, according to the present invention, the nano metal palladium-nickel composite particles having a palladium shell-nickel core structure are placed in glycerol, the glycerol is heated to 260 to 285 ℃, ozone generated by an ozone generator is introduced into the glycerol containing the nano metal palladium-nickel composite particles, and the nano metal palladium-nickel composite particles are oxidized to form the nano palladium oxide shell-nickel oxide core composite particles, thereby obtaining the nano oxide composite particles having a palladium oxide shell-nickel oxide core structure, which can be used as a motor vehicle exhaust catalyst material.
The third step in the above technical approach is a key step of the present invention, i.e. the metallic nickel atoms in the core of the composite particles must be sufficiently oxidized into nickel oxide to prevent the metallic nickel atoms remaining in the core of the composite particles from diffusing to the surface of the composite particles due to their high mobility in the high-temperature catalytic operating state, thereby reducing the surface catalytic activity of the composite particles. In order to prevent the agglomeration of the nano metal palladium-nickel composite particles during the oxidation in the air, the invention adopts a method for oxidizing the metal palladium-nickel composite particles in a liquid phase. The method comprises the steps of putting nano metal palladium-nickel composite particles into glycerol (boiling point 290 ℃), heating the glycerol to 260-285 ℃, introducing ozone generated by an ozone generator into the glycerol containing the nano metal palladium-nickel composite particles as an oxidant of the nano metal palladium-nickel composite particles, and oxidizing the nano metal palladium-nickel composite particles into nano oxide composite particles with a palladium oxide shell-nickel oxide core structure. In the oxidation process, ozone is used as an oxidizing agent in order to prevent the particles from agglomerating by conducting ozone gas to perform disordered stirring. Heating glycerol to 260-285 ℃ is to increase the oxidation temperature to promote the diffusion of oxygen atoms to the core of the nano metal palladium-nickel composite particles, thereby achieving the sufficient oxidation of the metal palladium-nickel composite particles.
Drawings
FIG. 1 is a diagram of a nano palladium oxide-nickel oxide composite particle;
fig. 2 is an X-ray diffraction spectrum of the nano palladium oxide-nickel oxide composite particle.
Detailed Description
Example 1
Preparing 1000ml of nickel sulfate solution with the concentration of 0.5mol/l, and adding the complexing agent sodium citrate according to the nickel sulfate/sodium citrate molar ratio = 1: 2. 500ml of hydrazine hydrate is taken and a certain amount of NH is added4OH adjusts the pH value of the hydrazine hydrate solution to 11. At room temperature, under the conditions of mechanical stirring and ultrasonic vibration, hydrazine hydrate and NH are mixed4And pouring the OH mixed solution into a nickel sulfate solution to react for 5 minutes, so that hydrazine hydrate reduces nickel ions, and metal nickel particles with the average particle size of about 200nm are prepared.
1000ml of palladium nitrate solution with the concentration of 0.2mol/l is prepared, and a certain amount of nitric acid is added to adjust the pH value of the palladium nitrate solution to be 3. And (2) under the conditions of room temperature and mechanical stirring, washing the prepared nano nickel particles by using deionized water, and then adding the washed nano nickel particles into a palladium nitrate solution to react for 20 minutes to obtain the nano metal palladium-nickel composite particles with the palladium shell-nickel core structure.
The preparation method comprises the following steps of cleaning nano metal palladium-nickel composite particles with a palladium shell-nickel core structure by using deionized water, adding the cleaned nano metal palladium-nickel composite particles into 500ml of glycerol, heating the glycerol containing the nano metal palladium-nickel composite particles to 275-285 ℃, and introducing ozone into the glycerol at a flow rate of 1 liter per minute to oxidize the metal palladium-nickel composite particles for 20 minutes to prepare the nano palladium oxide-nickel oxide composite particles with the palladium oxide shell-nickel oxide core structure, wherein the morphology of the nano palladium oxide-nickel oxide composite particles is shown in figure 1, and figure 2 is an X-ray diffraction spectrum of the prepared nano palladium oxide-nickel oxide composite particles with the palladium oxide shell-nickel oxide core structure.
According to the experiment, the above conditions can be adjusted to a certain extent, for example, the particle size of the metallic nickel particles can be adjusted to 150-250nm, and the reaction in the palladium nitrate solution can be adjusted according to the need.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A preparation method of a nano catalytic material with a palladium oxide shell-nickel oxide core structure is characterized by comprising the following steps:
the first step is as follows: preparing metal nickel particles;
the second step is that: coating palladium metal outside the metal nickel particles to prepare nano metal palladium-nickel composite particles with a palladium shell-nickel core structure;
the third step: using glycerol as a nano metal palladium-nickel composite particle carrier liquid, heating the glycerol to more than 250 ℃, and using ozone as an oxidant to prepare the nano catalytic material with the palladium oxide shell-nickel oxide core structure.
2. The method for preparing a nano catalytic material having a palladium oxide shell-nickel oxide core structure according to claim 1, wherein the method for preparing the metallic nickel particles in the first step comprises: preparing 1000ml of nickel sulfate solution with the concentration of 0.5mol/l, and adding a complexing agent sodium citrate according to the molar ratio of nickel sulfate to sodium citrate = 1: 2; 500ml of hydrazine hydrate is taken and NH is added4OH adjusting the pH value of a hydrazine hydrate solution to 11; at room temperature, under the conditions of mechanical stirring and ultrasonic vibration, hydrazine hydrate and NH are mixed4The OH mixed solution is poured into the nickel sulfate solution to react for 5 minutes, so that hydrazine hydrate reduces nickel ions to obtain nano particlesMetallic nickel particles.
3. The method of claim 2, wherein the nickel particles have an average particle size of 200 nm.
4. The method for preparing a nanocatalyst material having a palladium oxide shell-nickel oxide core structure as set forth in claim 1, wherein the second step comprises the steps of: preparing 1000ml of palladium nitrate solution with the concentration of 0.2mol/l, and adding nitric acid to adjust the pH value of the palladium nitrate solution to 3; and under the conditions of room temperature and mechanical stirring, washing the nickel particles by using deionized water, and then adding the washed nickel particles into a palladium nitrate solution to react for 20 minutes to obtain the nano metal palladium-nickel composite particles with the palladium shell-nickel core structure.
5. The method for preparing the nano catalytic material with the palladium oxide shell-nickel oxide core structure according to claim 1, wherein the heating temperature of glycerol in the third step is 275-285 ℃.
6. The method of claim 1, wherein the ozone is introduced at a rate of 1 liter per minute.
7. The nano catalytic material with the palladium oxide shell-nickel oxide core structure prepared by the preparation method of the nano catalytic material with the palladium oxide shell-nickel oxide core structure of any one of claims 1 to 6 is used for purifying the tail gas of the motor vehicle.
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| JPS6279847A (en) * | 1985-10-01 | 1987-04-13 | Nippon Shokubai Kagaku Kogyo Co Ltd | Catalyst system for combustion of lower hydrocarbon fuel and combustion method using said system |
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| CN104043460A (en) * | 2014-06-11 | 2014-09-17 | 华东理工大学 | Preparation method for nickel oxide loaded palladium catalyst and application to room-temperature CO catalytic oxidation |
| CN106311273A (en) * | 2016-07-26 | 2017-01-11 | 厦门大学 | Ceria-laden PdNi alloy catalyst and the preparation method and application thereof |
| CN107262082A (en) * | 2016-03-31 | 2017-10-20 | 丰田自动车株式会社 | Hud typed oxide material, its manufacture method, exhaust gas purification catalyst and exhaust gas-cleaning method using the material |
-
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- 2018-05-09 CN CN201810440142.8A patent/CN108686677B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6279847A (en) * | 1985-10-01 | 1987-04-13 | Nippon Shokubai Kagaku Kogyo Co Ltd | Catalyst system for combustion of lower hydrocarbon fuel and combustion method using said system |
| CN103084571A (en) * | 2012-12-30 | 2013-05-08 | 南京师范大学 | Nanometer Al/Ni/hydroxyl-terminatedpoly butadiene (HTPB) nucleus-shell structure energetic composite particle and preparation method thereof for solid propellant |
| CN104043460A (en) * | 2014-06-11 | 2014-09-17 | 华东理工大学 | Preparation method for nickel oxide loaded palladium catalyst and application to room-temperature CO catalytic oxidation |
| CN107262082A (en) * | 2016-03-31 | 2017-10-20 | 丰田自动车株式会社 | Hud typed oxide material, its manufacture method, exhaust gas purification catalyst and exhaust gas-cleaning method using the material |
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