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Single-atom platinum-based catalytic material under different atmospheres, and preparation method and application thereof

A catalytic material and atomic technology, applied in the field of air pollution control, can solve the problems of easy agglomeration, easy deactivation, limitation, and high price of active centers, and achieve excellent low-temperature activity and reaction stability

Active Publication Date: 2021-06-15
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high price of precious metals and the easy agglomeration and deactivation of active centers, the prospect of further industrial application is limited.

Method used

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  • Single-atom platinum-based catalytic material under different atmospheres, and preparation method and application thereof
  • Single-atom platinum-based catalytic material under different atmospheres, and preparation method and application thereof
  • Single-atom platinum-based catalytic material under different atmospheres, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1 Synthesis of single-atom platinum-based copper oxide catalytic material under air atmosphere

[0050] (1) Dissolve 50g of sodium hydroxide in 400mL of deionized water, and stir at 800rpm for 10min to fully dissolve it;

[0051] (2) After the solution in step (1) is down to room temperature, add 9 g of cetyltrimethylammonium bromide to the above mixed solution, and stir at 800 rpm for 10 min to fully dissolve it;

[0052] (3) Heat the solution obtained in step (2) to 75° C., and stir at 800 rpm for 10 minutes to make it evenly mixed;

[0053] (4) Dissolve 1.37g of copper acetate in 40mL of deionized water, and stir at 700rpm for 5min to completely dissolve;

[0054] (5) Add the solution obtained in step 4 to the solution obtained in step (3) dropwise, and continue to stir at 1000 rpm for at least 60 minutes until the foam in the solution disappears completely and mixes uniformly;

[0055] (6) After waiting for the solution in step (5) to drop to room temperat...

Embodiment 2

[0063] Example 2 Synthesis of single-atom platinum-based copper oxide catalytic material under nitrogen atmosphere

[0064] (1) Dissolve 50g of sodium hydroxide in 400mL of deionized water, and stir at 800rpm for 10min to fully dissolve it;

[0065] (2) After the solution in step (1) is down to room temperature, add 9 g of cetyltrimethylammonium bromide to the above mixed solution, and stir at 800 rpm for 10 min to fully dissolve it;

[0066] (3) Heat the solution obtained in step (2) to 75° C., and stir at 800 rpm for 10 minutes to make it evenly mixed;

[0067] (4) Dissolve 1.37g of copper acetate in 40mL of deionized water, and stir at 700rpm for 5min to completely dissolve;

[0068] (5) Add the solution obtained in step 4 to the solution obtained in step (3) dropwise, and continue to stir at 1000 rpm for at least 60 minutes until the foam in the solution disappears completely and mixes uniformly;

[0069] (6) After waiting for the solution in step (5) to drop to room tem...

Embodiment 3

[0077] Example 3 Synthesis of single-atom platinum-based copper oxide catalytic material under 5vol.% carbon monoxide atmosphere

[0078] (1) Dissolve 50g of sodium hydroxide in 400mL of deionized water, and stir at 800rpm for 10min to fully dissolve it;

[0079] (2) After the solution in step (1) is down to room temperature, add 9 g of cetyltrimethylammonium bromide to the above mixed solution, and stir at 800 rpm for 10 min to fully dissolve it;

[0080] (3) Heat the solution obtained in step (2) to 75° C., and stir at 800 rpm for 10 minutes to make it evenly mixed;

[0081] (4) Dissolve 1.37g of copper acetate in 40mL of deionized water, and stir at 700rpm for 5min to completely dissolve;

[0082](5) Add the solution obtained in step 4 to the solution obtained in step (3) dropwise, and continue to stir at 1000 rpm for at least 60 minutes until the foam in the solution disappears completely and mixes uniformly;

[0083] (6) After waiting for the solution in step (5) to dro...

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Abstract

The invention discloses a single-atom platinum-based catalytic material under different atmospheres, and a preparation method and application thereof. Different reaction atmospheres are introduced, and regulation and control of single-atom active site performance are realized through conversion of the reaction atmospheres. The synthesis of the monatomic platinum-based catalytic material is realized under the conditions of air, nitrogen, carbon monoxide or ammonia gas. By utilizing the specific low surface polarizability and high-density unsaturated coordination atoms of a two-dimensional layered copper oxide carrier, on one hand, the reducibility of a reaction system can be maintained in a carbon monoxide atmosphere, and the two-dimensional layered copper oxide carrier can be further complexed with the unsaturated coordination atoms on the surface of the carrier to form carboxyl groups, so that a monatomic precursor is captured; and on the other hand, under the condition of ammonia gas, the monatomic precursor can form a Pt-(NH4)x group, so that the Pt-(NH4)x group is anchored on the surface of the carrier, and abundant surface hydroxyl groups are generated around the Pt-(NH4)x group. The monatomic platinum-based catalytic material prepared under different atmospheres has excellent low-temperature activity and reaction stability.

Description

technical field [0001] The invention belongs to the technical field of air pollution control, in particular to a single-atom platinum-based catalytic material under different atmospheres, its preparation method and application. Background technique [0002] Volatile Organic Compounds (Volatile Organic Compounds, VOCs) refer to organic compounds with a boiling point lower than 260°C at normal pressure, or a saturated vapor pressure exceeding 133.32Pa at room temperature (25°C), which are emitted into the air in the form of gaseous molecules The general term for organic compounds. There are many kinds of VOCs, mainly including aliphatic hydrocarbons, oxygen-containing hydrocarbons, aromatic hydrocarbons and their derivatives, halogen-containing hydrocarbons, nitrogen-containing hydrocarbons, sulfur-containing hydrocarbons, etc. VOCs have high atmospheric chemical reactivity and are the key factor for the enhancement of atmospheric oxidation. [0003] In recent years, the tot...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J35/10B01D53/86B01D53/72
CPCB01J23/8926B01D53/8668B01J35/613B01J35/633
Inventor 何炽姜泽宇马牧笛田明姣陈长伟武雅妮
Owner XI AN JIAOTONG UNIV