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Noble metal ruthenium monatomic supported catalyst as well as preparation method and application thereof

A ruthenium-based catalyst and catalyst technology, applied in the direction of catalysts, carbon compound catalysts, chemical instruments and methods, etc., can solve the problems of narrow absorption band of photocatalysts, fast recombination of photogenerated charges, poor product selectivity, etc. Industrialization and cost-saving effects

Active Publication Date: 2021-11-09
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, photocatalysts have problems such as narrow absorption band, fast recombination of photogenerated charges, low quantum efficiency, and poor product selectivity.

Method used

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  • Noble metal ruthenium monatomic supported catalyst as well as preparation method and application thereof
  • Noble metal ruthenium monatomic supported catalyst as well as preparation method and application thereof
  • Noble metal ruthenium monatomic supported catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Measure 3mmol cadmium acetate dihydrate and 6mmol L-cysteine ​​into 108mL deionized water, stir continuously for 30min to form a milky white solution, add 12mL ethanolamine, and stir continuously for 30min to form a transparent solution, after 180℃ hydrothermal reaction for 24h, After washing several times with absolute ethanol and deionized water, and drying overnight at 80 °C, pure yellow CdS was obtained.

Embodiment 2

[0048] Take 1 g of the dry pure CdS powder prepared in Example 1, disperse it in 100 mL of deionized water, ultrasonically and stir for 15 min, add 25 mL of 1 mol / L ammonium carbonate solution, continue stirring for 15 min, take 0.388 mL of the concentration of 2.58 mg / mL RuCl 3 The aqueous solution was dispersed in 50 mL of deionized water, added dropwise, stirred overnight, washed several times with absolute ethanol and deionized water, dried at 80 °C for 4 h, and treated at 200 °C for 4 h in a pure hydrogen atmosphere. In terms of mass, Ru accounts for 0.1%, that is, 0.1% Ru / CdS.

Embodiment 3

[0050] Take 1 g of the dry pure CdS powder prepared in Example 1, disperse it in 100 mL of deionized water, ultrasonically and stir for 15 min, add 25 mL of 1 mol / L ammonium carbonate solution, continue stirring for 15 min, take 1.948 mL of the concentration of 2.58 mg / mL RuCl 3 The aqueous solution was dispersed in 50 mL of deionized water, added dropwise, stirred overnight, washed several times with absolute ethanol and deionized water, dried at 80 °C for 4 h, and treated at 200 °C for 4 h in a pure hydrogen atmosphere. In terms of mass, Ru accounts for 0.5%, that is, 0.5% Ru / CdS.

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Abstract

The invention discloses a noble metal ruthenium monatomic supported catalyst as well as a preparation method and application thereof. The catalyst comprises a sulfide carrier and ruthenium dispersed on the surface of the sulfide carrier in a monatomic form, and the proportion of single ruthenium atoms is 0.01-10% by mass of the ruthenium-based catalyst. The CO2 adsorption capacity, the photo-generated charge separation capacity, the light absorption capacity, the photo-thermal conversion capacity and other properties of the catalyst are obviously improved. The preparation method has the advantages of simple and rapid preparation and cost saving, and can realize monatomic dispersion of high-specific-gravity noble metal ruthenium on the surface of cadmium sulfide. According to the monatomic dispersed ruthenium noble metal catalyst prepared by the method, the dispersity of noble metal is improved, the use cost of the noble metal is reduced, and the photo-thermal catalytic reduction of CO2 and high CH4 selectivity of the catalyst are ensured.

Description

technical field [0001] The invention belongs to CO 2 The technical field of reduction catalyst materials, specifically relates to a noble metal single-atom supported catalyst and its preparation method and application. Background technique [0002] With the rapid development of industrial society, the increasing consumption of fossil energy not only causes CO 2 The rapid increase of emissions has caused a series of environmental problems such as the "greenhouse effect", and also caused a shortage of non-renewable resources. Therefore, how to utilize CO 2 "Turning waste into treasure" has become one of the hot topics in the world. [0003] Currently, catalytic reduction of CO 2 The main methods are electrochemistry, bioelectrochemistry, thermal catalysis and photocatalysis. Among them, the thermal catalytic method requires a higher temperature for reaction, which increases energy consumption, and at the same time causes sintering and deactivation of the catalyst, shorten...

Claims

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Application Information

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IPC IPC(8): B01J27/045C07C1/02C07C9/04
CPCB01J27/045C07C1/02C07C2527/045B01J35/39C07C9/04
Inventor 贾宏鹏蔡松财
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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