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Preparation method of RuCl3/Cu-MOF-based composite catalyst and application

A composite catalyst, cu-mof technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes and other directions, can solve the problems of ammonia supply environment and other problems, achieve short time consumption, simple preparation process, high speed and selective enhancement

Inactive Publication Date: 2019-10-22
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since fossil fuels (mainly natural gas) are H 2 major source of precursors, so the prospect of continued and increasing use of the process for future ammonia supply poses serious environmental concerns

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1 A kind of based on RuCl 3 Preparation method of / Cu-MOF composite catalyst

[0035] (1) Preparation of RuCl 3 / Cu-MOF nanocrystal

[0036] 0.8 mmol of copper acetate and 0.50 mg of ruthenium trichloride were blended with 8 mL of water, and ultrasonicated at 180 W for 2 min to obtain a mixed solution of copper acetate and ruthenium trichloride;

[0037] 0.8 mmol of ligand H 2 Sala and 0.8 mmol of LiOH were added to 8 mL of water and stirred for 25 min to obtain a clear ligand solution;

[0038] The mixed solution of copper acetate and ruthenium trichloride was blended with the ligand solution, and allowed to stand at room temperature for 5 min to prepare Cu-MOF loaded with RuCl 3 nanocrystals, namely RuCl 3 / Cu-MOF nanocrystals with a yield of 73%;

[0039] (2) RuCl 3 / Pyrolysis of Cu-MOF nanocrystals

[0040] RuCl 3 / Cu-MOF nanocrystals were dried in air at 85 °C to constant weight, placed in a tube furnace, and pyrolyzed at 700 °C for 2 h in an arg...

Embodiment 2

[0043] Embodiment 2 A kind of based on RuCl 3 Preparation method of / Cu-MOF composite catalyst

[0044] (1) Preparation of RuCl 3 / Cu-MOF nanocrystal

[0045] 0.9 mmol of copper acetate and 0.55 mg of ruthenium trichloride were blended with 9 mL of water, and 180 W was ultrasonicated for 3 min to obtain a mixed solution of copper acetate and ruthenium trichloride;

[0046] 0.9 mmol of ligand H 2 Sala and 0.9 mmol of LiOH were added to 9 mL of water and stirred for 27 min to obtain a clear ligand solution;

[0047] The mixed solution of copper acetate and ruthenium trichloride was blended with the ligand solution, and allowed to stand at room temperature for 7 min to prepare Cu-MOF loaded with RuCl 3 nanocrystals, namely RuCl 3 / Cu-MOF nanocrystals with a yield of 76%;

[0048] (2) RuCl 3 / Pyrolysis of Cu-MOF nanocrystals

[0049] RuCl 3 / Cu-MOF nanocrystals were dried in air at 85 °C to constant weight, placed in a tube furnace, and pyrolyzed at 700 °C for 2 h in an a...

Embodiment 3

[0051] Embodiment 3 A kind of based on RuCl 3 Preparation method of / Cu-MOF composite catalyst

[0052] (1) Preparation of RuCl 3 / Cu-MOF nanocrystal

[0053] 1.0 mmol of copper acetate and 0.60 mg of ruthenium trichloride were blended with 10 mL of water, and ultrasonicated at 180 W for 4 min to obtain a mixed solution of copper acetate and ruthenium trichloride;

[0054] 1.0 mmol of ligand H 2 Sala and 1.0 mmol of LiOH were added to 10 mL of water and stirred for 30 min to obtain a clear ligand solution;

[0055] The mixed solution of copper acetate and ruthenium trichloride and the ligand solution were blended and allowed to stand at room temperature for 10 min to prepare Cu-MOF loaded RuCl 3 nanocrystals, namely RuCl 3 / Cu-MOF nanocrystals with a yield of 74%;

[0056] (2) RuCl 3 / Pyrolysis of Cu-MOF nanocrystals

[0057] RuCl 3 / Cu-MOF nanocrystals were dried in air at 85 °C to constant weight, placed in a tube furnace, and pyrolyzed at 700 °C for 2 h in an argon...

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Abstract

The invention discloses a preparation method of a RuCl3 / Cu-MOF-based composite catalyst and application of the catalyst in catalyzing room temperature nitrogen reduction to ammonia, belonging to the technical fields of nanomaterials and catalysis. The method mainly comprises the following steps: mixing a copper acetate solution, a ruthenium trichloride solution and a ligand solution to prepare RuCl3 / Cu-MOF nanocrystals; placing the RuCl3 / Cu-MOF nanocrystals in a tube furnace, and pyrolyzing at 700 DEG C for 2 hours under an argon atmosphere to obtain a carbon-nitrogen matrix nano-porous composite material co-doped with CuO nanoparticles and Ru nanoparticles, namely the RuCl3 / Cu-MOF-based composite catalyst; the catalyst is used in catalyzing room temperature nitrogen reduction to ammonia,and has simple preparation process, low cost and good industrial prospect.

Description

technical field [0001] The invention discloses a RuCl-based 3 The preparation method of the / Cu-MOF composite catalyst and the application of the catalyst for catalyzing the reduction of nitrogen at room temperature into ammonia based on the catalyst belong to the fields of nanomaterial technology and catalytic technology. Background technique [0002] The synthesis of ammonia from molecular nitrogen and hydrogen is one of the greatest inventions of the 20th century. Today, the century-old Haber-Bosch process is the source of most of the world's ammonia, accounting for 90 percent of annual production. Ammonia and its derivatives (including urea) are important components of fertilizers. It is estimated that without the use of artificial fertilizers in the Haber-Bosch process, global food production could support only a fraction of the world's population today. However, since fossil fuels (mainly natural gas) are H 2 The main source of precursors, so the prospect of contin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10C25B1/00C25B11/06
CPCB01J27/24C25B1/00C25B11/093B01J35/33B01J35/61
Inventor 侯莹匡轩
Owner UNIV OF JINAN
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