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Monoatomic dispersed noble metal catalyst and application thereof

A noble metal catalyst, atomic dispersion technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc., can solve the problem of steady-state start-up and use stability, which has not been reported to achieve excellent stability in use, inhibit methanation side reactions, and avoid consumption

Active Publication Date: 2018-02-02
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Whether high-loaded single-atom catalysts can greatly increase the overall conversion rate of CO in the water-gas shift reaction, and at the same time effectively inhibit the methanation side reaction, has not yet been reported.
In addition, single-atom catalysts exhibit higher atom utilization than sub-nanometer catalysts in the decomposition of anhydrous hydrazine (GF201218006496.5), but their steady-state start-up performance under the actual conditions of aerospace propellant grade anhydrous hydrazine decomposition at room temperature and stability in use have not been reported

Method used

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  • Monoatomic dispersed noble metal catalyst and application thereof
  • Monoatomic dispersed noble metal catalyst and application thereof
  • Monoatomic dispersed noble metal catalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Ultrasonic disperse 1g of P25 carrier in 100mL deionized water to form a suspension; take 40mL of 0.68mg / mL RhCl 3Solution, add 100mL deionized water to stir and dilute, and add dropwise to the carrier suspension under strong stirring, adjust the pH value to 9.4, stir at 80°C for 3h, let stand for 1h, filter, wash with hot water, and dry in an oven at 80°C 12h. After drying, the catalyst was calcined at 400°C in air for 4h to obtain 2.5wt.%Rh / TiO 2 catalyst.

Embodiment 2

[0035] With 0.3g embodiment 1 described 2.5wt.%Rh / TiO 2 Catalyst at 30mL / min of 10vol.%H 2 / He was reduced at 200°C for 30 min, and quickly transferred to 30 mL of 11.6 mol / L HCl / 1% H under vigorous stirring. 2 o 2 In the mixed solution, stir and react at 65°C for 3h, filter, wash with hot water, and dry in an oven at 80°C for 12h to obtain 0.4wt.%Rh / TiO 2 -AL catalyst.

Embodiment 3

[0037] Prepare 7.9wt.%Rh / TiO by the method described in embodiment 1 2 catalyst. Implement 7.9wt.%Rh / TiO with 0.3g 2 Catalyst at 30mL / min of 10vol.%H 2 / He was reduced at 200°C for 30 min, and quickly transferred to 30 mL of 11.6 mol / L HCl / 1% H under vigorous stirring. 2 o 2 In the mixed solution, stir and react at 65°C for 3h, filter, wash with hot water, and dry in an oven at 80°C for 12h to obtain 2.0wt.%Rh / TiO 2 -AL catalyst.

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Abstract

The invention relates to a monoatomic dispersed platinum group metal based catalyst with a higher loading capacity and an application of the catalyst. Specifically, the invention relates to a bicomponent catalyst of titanium oxide and one selected from metals rhodium (Rh), ruthenium (Ru), platinum (Pt), iridium (Ir) and palladium (Pd) as well as preparation and an application of the catalyst. Themetal is highly dispersed in the form of a single atom on the carrier titanium oxide, and the metal content is up to 0.4-2%. The catalyst provided by the invention is suitable for the CO water gas shift reaction, and can improve the CO conversion rate and inhibit a methanation side reaction; and meanwhile, the catalyst also has very good low-temperature activity and use stability on catalytic decomposition of the liquid single-component propellant level anhydrous hydrazine used in a satellite attitude control engine in the aerospace industry.

Description

technical field [0001] The invention relates to a single-atom platinum group metal catalyst with a high loading capacity and its application in CO water-gas shift reaction and the decomposition of liquid single-unit anhydrous hydrazine at normal temperature for an aerospace satellite attitude control engine. When the metal is dispersed in the form of a single atom, the loading capacity is as high as 0.4-2%, which can increase the conversion rate of CO and inhibit the occurrence of methanation side reactions in the water gas shift reaction; it also has a good room temperature for the catalytic decomposition of aerospace propellant grade anhydrous hydrazine Steady-state start-up and stability in use. Background technique [0002] Hydrogen plays an important role in the chemical and chemical production process. It is not only used as a raw material for ammonia synthesis and hydrogenation, but also used as a clean and efficient energy source for proton exchange membrane fuel cel...

Claims

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Application Information

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IPC IPC(8): B01J23/46C01B3/16C06D5/04
CPCB01J23/462B01J37/009B01J37/06B01J37/18C01B3/16C06D5/04Y02P20/52
Inventor 王晓东关红玲林坚张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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