Preparation method of copper-antimony monatomic alloy catalyst and application of copper-antimony monatomic alloy catalyst in reduction of carbon dioxide

A catalyst, copper-antimony single technology, applied in metal processing equipment, transportation and packaging, nanotechnology for materials and surface science, etc., can solve the problems of low selectivity, easy generation of multi-carbon products, etc., and achieve a simple synthesis method. , the effect of excellent electrochemical carbon dioxide reduction performance, high carbon monoxide selectivity and activity

Active Publication Date: 2022-07-29
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0004] Aiming at the low selectivity of carbon dioxide reduction products in the above-mentioned prior art and the problems of easily producing multi-carbon products under high current density, the present invention provides copper-antimony single Atomic alloy catalyst preparation method and carbon dioxide reduction application that can suppress carbon-carbon coupling without reducing intrinsic activity and achieve high selectivity from carbon dioxide to carbon monoxide

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  • Preparation method of copper-antimony monatomic alloy catalyst and application of copper-antimony monatomic alloy catalyst in reduction of carbon dioxide
  • Preparation method of copper-antimony monatomic alloy catalyst and application of copper-antimony monatomic alloy catalyst in reduction of carbon dioxide
  • Preparation method of copper-antimony monatomic alloy catalyst and application of copper-antimony monatomic alloy catalyst in reduction of carbon dioxide

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Embodiment 1

[0037] The present embodiment prepares a copper-antimony single-atom alloy nano-catalyst, and the specific steps are as follows:

[0038] Disperse 1 mmol of antimony chloride in 20 ml of deionized water and add 3 mmol of citric acid to obtain mixed solution A; disperse 20 mmol of cupric chloride dihydrate in 20 ml of deionized water to obtain solution B; take 3.2 ml of mixed solution A, 2 ml of solution B, 1 ml of hydrochloric acid with a concentration of 3 mol per liter and 13.8 ml of deionized water, mixed to obtain 20 ml of mixed solution C; the mixed solution C was allowed to stand in an ice bath at -5°C for 60 minutes , and then poured into 10 ml of sodium borohydride aqueous solution with a concentration of 1 mol per liter at a rate of 10 ml per second to obtain mixed solution D; after mixed solution D was allowed to stand at room temperature for 2 hours, it was rotated at 10,000 rpm. , centrifugal separation for 10 minutes, the obtained product was ultrasonically washed...

Embodiment 2

[0047] The present embodiment prepares a copper-antimony single-atom alloy nano-catalyst, and the specific steps are as follows:

[0048] Disperse 1 mmol of antimony chloride in 20 ml of deionized water and add 3 mmol of citric acid to obtain mixed solution A; disperse 20 mmol of cupric chloride dihydrate in 20 ml of deionized water to obtain solution B; take 1.2 ml of mixed solution A, 2 ml of solution B, 1 ml of hydrochloric acid with a concentration of 3 mol per liter and 15.8 ml of deionized water, mixed to obtain 20 ml of mixed solution C; the mixed solution C was allowed to stand in an ice bath at -5°C for 60 minutes , and then poured into 10 ml of sodium borohydride aqueous solution with a concentration of 1 mol per liter at a rate of 10 ml per second to obtain mixed solution D; after mixed solution D was allowed to stand at room temperature for 2 hours, it was rotated at 10,000 rpm. , centrifugal separation for 10 minutes, the obtained product was ultrasonically washed...

Embodiment 3

[0056] The present embodiment prepares a copper-antimony single-atom alloy nano-catalyst, and the specific steps are as follows:

[0057] Disperse 1 mmol of antimony chloride in 20 ml of deionized water and add 3 mmol of citric acid to obtain mixed solution A; disperse 20 mmol of cupric chloride dihydrate in 20 ml of deionized water to obtain solution B; take 8 Milliliter of mixed solution A, 2 milliliters of solution B, 1 milliliter of hydrochloric acid with a concentration of 3 mol per liter, and 9 milliliters of deionized water were mixed to obtain 20 milliliters of mixed solution C; mixed solution C was allowed to stand in an ice bath at -5°C for 60 minutes , and then poured into 10 ml of sodium borohydride aqueous solution with a concentration of 1 mol per liter at a rate of 10 ml per second to obtain mixed solution D; after mixed solution D was allowed to stand at room temperature for 2 hours, it was rotated at 10,000 rpm. , centrifugal separation for 10 minutes, the obt...

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Abstract

The invention provides a preparation method of a copper-antimony monatomic alloy catalyst and carbon dioxide reduction application, and belongs to the technical field of metal nano catalysts.The preparation method comprises the steps that a mixed solution A in which antimony chloride and citric acid are dispersed and a solution B in which copper chloride dihydrate is dispersed are prepared and jointly mixed with hydrochloric acid and deionized water, and a mixed solution C is obtained; and after standing in an ice bath, pouring a sodium borohydride aqueous solution for standing reaction, and after multiple times of centrifugation, washing, drying and grinding, obtaining the copper nanoparticles loaded with antimony atoms with different concentrations and mutually isolated antimony atoms. By loading mutually isolated antimony atoms on the copper nanoparticles and adjusting the electronic state of the copper atoms, the copper nanoparticles lose the ability of carbon-carbon coupling to generate multi-carbon products, have extremely high selectivity and activity for converting carbon dioxide into carbon monoxide, and provide an effective way for industrial-grade efficient conversion of carbon dioxide.

Description

technical field [0001] The invention belongs to the technical field of metal nano-catalysts, and in particular relates to a preparation method of a copper-antimony single-atom alloy catalyst and application of carbon dioxide reduction. Background technique [0002] In recent years, massive carbon dioxide emissions from the burning of fossil fuels have led to a sharp rise in atmospheric carbon dioxide concentrations, which has sparked global attention to climate change. To this end, the country proposes to achieve the goal of "carbon peaking" by 2030 and "carbon neutrality" by 2060. Electrochemical carbon dioxide reduction provides a sustainable method to directly convert carbon dioxide into valuable chemicals at ambient temperature and pressure, thereby reducing carbon dioxide emissions and relieving dependence on fossil fuels. Among the products obtained from carbon dioxide reduction, carbon monoxide is one of the most important feedstocks that can be used for sustainable ...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/054C25B11/054C25B11/091C25B1/23B82Y30/00B82Y40/00
CPCB22F9/24C25B11/054C25B11/091C25B1/23B82Y30/00B82Y40/00
Inventor 夏川李嘉伟曾洪亮
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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