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Preparation method and application of supported metal monatomic catalyst

A catalyst and supported technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., to achieve the effect of low cost, simple method and cost reduction

Active Publication Date: 2021-05-28
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there have been no reports on the preparation of single-atom catalysts with high loading and controllable metal and nitrogen coordination numbers.

Method used

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  • Preparation method and application of supported metal monatomic catalyst
  • Preparation method and application of supported metal monatomic catalyst

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preparation example Construction

[0027]The present invention also includes any of the above Mnx-SA / NC preparation method, including the following steps:

[0028]1) The nitrogen-containing inorganic matter, metal salt and template salt. The ball mill is loaded in a weight of the weight, and the ball mill is 30 min to 10 h.

[0029]2) The powder obtained by the ball is heated in the tubular furnace, wherein the heating speed is from 1 to 5 ° C / min, the heating temperature ranges from 500 to 900 ° C, the holding time is 30 ~ 300 min, and the gas can be, but not limited to Is N2Or Ar gas, finally cool down to get MNx-SA / NC catalyst.

[0030]The present invention also provides any of the above MNxApplication of - SA / NC in electrocatalytic carbon dioxide.

Embodiment 1

[0033]Cun2-SA / NC preparation method, including the following steps:

[0034]1) Cu (NO) by weight of 5% by weight3)225% s 250 rms, and the mass ratio of the ball is 25: 1, the ball mill is 350 r / min, and the ball mill is worn for 4 hours to obtain a uniform powder.

[0035]2) The powder obtained by step 1) is placed in a program-controlled temperature tube furnace. Under the nitrogen atmosphere, the temperature rise rate is 5 ° C / min, warmed to 600 ° C, heat insulation for 1 hour, naturally cooled to room temperature, to obtain CUN2-SA / NC nanomaterial; CUN2-SA / NC nanomaterial is a three-dimensional mesh structure, where Cu has a load of 33.2% by weight.

Embodiment 2

[0037]Fen3-SA / NC preparation method, including the following steps:

[0038]1) FE (NO) by weight of 100% by weight3)3, 27% melamine and 70% NaCl have a high energy ball mill ball mill, and the mass ratio of the ball is 25: 1, the ball mill is 350 r / min, the ball mill is worn for 4 hours to obtain a uniform powder.

[0039]2) When the powder obtained by step 1) is placed in a program-controlled temperature tube furnace, under a nitrogen atmosphere, the temperature rise rate is 5 ° C / min, warmed to 650 ° C, heat insulation for 1 hour, naturally cooled to room temperature, to obtain FEN3-SA / NC nanomaterials;3-SA / NC nanomaterial is a three-dimensional mesh structure, wherein Fe has a load of 21.2% by weight.

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Abstract

The invention relates to a preparation method and application of a supported metal monatomic catalyst. The catalyst takes nitrogen-doped carbon as a skeleton, and metal single atoms are anchored on the skeleton; and the mass percentage of metal monatomic in the catalyst is 0.1 wt%-36 wt%. The method comprises the following steps: 1) carrying out ball milling on a nitrogen-containing organic matter, a metal salt and a template salt; and 2) heating the powder obtained by ball milling, and cooling the powder to obtain the MNx-SA / NC catalyst, wherein M is a metal element in the metal salt in the step 1), x is greater than or equal to 2 and less than or equal to 5, SA is the abbreviation of a single atom, and NC represents nitrogen-doped carbon. The prepared catalyst is applied to electro-catalysis of carbon dioxide. According to the invention, the problem of environmental pollution is overcome, the cost is reduced, the pore structure of the catalyst is effectively regulated and controlled, x in MNx is controlled in a targeted manner, the method is simple, and monatomic, diatomic and polyatomic catalysts with different loading capacities and metals can be prepared on a large scale.

Description

Technical field[0001]The present invention belongs to the field of catalysts, and more particularly to the preparation method and application of a load type metal single atomic catalyst.Background technique[0002]With the development of society, energy shortage and environmental pollution have become a problem for human production and social development. Therefore, it is urgent to develop high-efficiency catalyst materials for energy and substance transformation. Transition metal nanoparticles are widely used in superior catalytic properties such as Fe, CO, Ni, Mn, Cu, Mo, Ru, RH, PD, Ag, IR, PT, and Au, etc. Transition metal. However, the high cost of metals severely hinders its wide application in energy and material conversion technology. So find a cheap and easy-scale catalyst material has become one of the hotspots in the field of energy and material transformation.[0003]At present, the atomic fragmented single atomic metal catalyst has caused more and more attention. Because of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/23C25B3/03C25B3/26C25B11/091
CPCC25B1/00Y02E60/50
Inventor 朱英王兴谱
Owner BEIHANG UNIV