Hollow carbon-coated copper oxide nanoparticle catalyst as well as preparation method and application thereof

A technology of copper oxide and nanoparticles, applied in electrolysis components, electrodes, electrolysis process, etc., can solve the problem of low conversion rate of ammonia and achieve the effect of high production rate, cheap and easy-to-obtain raw materials, and mild conditions

Active Publication Date: 2021-08-10
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a hollow carbon-coated copper oxide nanoparticle catalys...

Method used

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  • Hollow carbon-coated copper oxide nanoparticle catalyst as well as preparation method and application thereof
  • Hollow carbon-coated copper oxide nanoparticle catalyst as well as preparation method and application thereof
  • Hollow carbon-coated copper oxide nanoparticle catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Weigh 1g of the Cu-MOF synthesized above, evenly distribute it in the magnetic boat, and then react in a tube furnace at 400°C for 2 hours under the protection of argon, cool to room temperature, and sieve;

[0051] Preparation of nitrate electrochemical reduction catalysts with carbon-coated copper nanoparticles.

Embodiment 2

[0053] Weigh 100 mg of the carbon-coated copper nanoparticles obtained in Example 1, evenly distribute them in a magnetic boat, and then react in a muffle furnace at 300° C. for 30 minutes under air, cool to room temperature, and sieve;

[0054] A catalyst for the electrochemical reduction of nitrate by hollow carbon-coated copper oxide nanoparticles with abundant oxygen vacancies was prepared.

Embodiment 3

[0056] Weigh 100 mg of carbon-coated copper nanoparticles obtained in Example 1, distribute them evenly in a magnetic boat, and then react in a muffle furnace at 300° C. for 60 minutes under air, cool to room temperature, and sieve;

[0057] A nitrate electrochemical reduction catalyst was prepared with hollow carbon-coated copper oxide nanoparticles.

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Abstract

The invention discloses a hollow carbon-coated copper oxide nanoparticle catalyst and a preparation method and application thereof. The preparation method comprises the steps: in an inert atmosphere, calcining copper metal organic framework powder for the first time, and obtaining a red product; carrying out secondary calcination treatment on the red product in an air atmosphere to obtain a calcined product; and grinding and sieving the calcined product to obtain the hollow carbon-coated copper oxide nanoparticle catalyst. The hollow carbon-coated copper oxide nano-particle catalyst with rich oxygen vacancies is effectively synthesized by utilizing the Kirkendall effect, due to the unique hollow structure and the rich oxygen vacancies, the maximum Faraday efficiency of ammonia of the catalyst is 94.2% under the potential of -0.2 V Vs RHE, the generation rate of ammonia reaches 487.8 mmol g<cat><-1> h<-1>, and the maximum Faraday efficiency of the catalyst is 94.2% under the potential of-0.2 V Vs RHE, and is about 2.4 times of the conversion rate of ammonia in the Haber-Bosch reaction.

Description

technical field [0001] The invention relates to the field of preparation of electrochemical reduction catalysts, in particular to a hollow carbon-coated copper oxide nanoparticle catalyst and its preparation method and application. Background technique [0002] Ammonia is not only a commonly used chemical raw material, but also an important new energy carrier. Industrial ammonia synthesis mainly focuses on the "N 2 -to-NH 3 "Converted Haber-Bosch reaction, but its reaction conditions are harsh, requiring high temperature and high pressure (350-550°C, 150-250atm). Normal temperature and pressure electrocatalytic reduction of nitrogen to ammonia, although it is expected to become a low-temperature substitute for the Haber-Bosch reaction, but Due to the low rate of ammonia production (usually less than 10 mmol g cat -1 h -1 ), the current density of ammonia production is small (less than 1mA cm -2 ) and the low selectivity of the ammonia production reaction make it diffic...

Claims

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Application Information

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IPC IPC(8): C25B1/27C25B11/091
CPCC25B1/00
Inventor 何传新覃永杰胡琪杨恒攀
Owner SHENZHEN UNIV
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