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A kind of copper-doped bismuth bimetallic material and its preparation and application

A bismuth metal and copper doping technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve poor stability, low current density, and low Faradaic efficiency and other issues, to achieve the effect of low cost, good conductivity and easy operation

Active Publication Date: 2021-06-29
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a copper-doped bismuth bimetallic material and its preparation and application, to overcome the defects of low current density, low Faraday efficiency and poor stability in the application process of the prior art

Method used

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  • A kind of copper-doped bismuth bimetallic material and its preparation and application
  • A kind of copper-doped bismuth bimetallic material and its preparation and application
  • A kind of copper-doped bismuth bimetallic material and its preparation and application

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Embodiment 1

[0042] The preparation method of CuBi electroplating solution under constant current density, described CuBi electroplating solution is used for electrodeposition Cu-doped-Bi metal electrode, and preparation method is:

[0043] Take 0.01mol trisodium citrate dihydrate, 0.01mol urea, 0.01mol ethylenediaminetetraacetic acid, 0.001mol Bi(NO 3 ) 3 ·5H 2 O and 0.001mol Cu(NO 3 ) 2 ·3H 2 O was successively dissolved in 100 mL deionized water. After stirring well, use 0.01M HNO 3 and 0.01M NaOH to adjust the pH to 6, add 0.68g sodium formate, stir well until clear and sonicate.

[0044] The pretreated foamed copper was cut into 1cm×1.5cm as the working electrode, and the spectroscopic graphite rod was used as the counter electrode, and the Cu-doped-Bi metal electrode for the electrochemical reduction of carbon dioxide was obtained by electrodeposition at 400mA for 1min. , called Cu (1) -doped-Bi (1) -400.

Embodiment 2

[0046] The preparation method of CuBi electroplating solution under constant current density, described CuBi electroplating solution is used for electrodeposition Cu-doped-Bi metal electrode, and its preparation method is:

[0047] Take 0.01mol trisodium citrate dihydrate, 0.01mol urea, 0.01mol ethylenediaminetetraacetic acid, 0.001mol Bi(NO 3 ) 3 ·5H 2 O and 0.00025mol Cu(NO 3 ) 2 ·3H 2 O was successively dissolved in 100 mL deionized water. After stirring well, use 0.01M HNO 3 and 0.01M NaOH to adjust the pH to 6, add 0.68g sodium formate, stir well until clear and sonicate.

[0048] The pretreated foamed copper was cut into 1cm×1.5cm as the working electrode, and the spectroscopic graphite rod was used as the counter electrode, and the Cu-doped-Bi metal electrode for the electrochemical reduction of carbon dioxide was obtained by electrodeposition at 400mA for 1min. , called Cu (0.25)- doped-Bi (1) -400.

Embodiment 3

[0050] Preparation method of CuBi electroplating solution under constant current density. Described CuBi electroplating solution is used for electrodeposition Cu-doped-Bi metal electrode, and its preparation method is:

[0051] Take 0.01mol trisodium citrate dihydrate, 0.01mol urea, 0.01mol ethylenediaminetetraacetic acid, 0.001mol Bi(NO 3 ) 3 ·5H 2 O and 0.00025mol Cu(NO 3 ) 2 ·3H 2 O was successively dissolved in 100 mL deionized water. After stirring well, use 0.01M HNO 3 and 0.01M NaOH to adjust the pH to 6, add 0.68g sodium formate, stir well until clear and sonicate.

[0052] The pretreated foamed copper was cut into 1cm×1.5cm as the working electrode, and the spectroscopic graphite rod was used as the counter electrode, and the Cu-doped-Bi metal electrode for the electrochemical reduction of carbon dioxide was obtained under the condition of 100mA for 1min. , called Cu (0.25)- doped-Bi (1) -100.

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Abstract

The invention relates to a copper-doped bismuth bimetallic material and its preparation and application. The electrode uses foamed copper as a support, and the surface of the support supports copper-doped bismuth metal. The preparation includes: pretreatment of foamed copper, preparation of CuBi electroplating solution and electrodeposition under constant current density. The preparation method of the present invention is simple, easy to operate, low in cost, environmentally friendly, and Cu-doped-Bi has a larger specific surface area, and there is a large amount of reduced CO 2 the active site. Therefore, the electrode can greatly inhibit the competitive hydrogen evolution reaction in the electrochemical reduction of carbon dioxide, has high electrode stability, high current density, and extremely high formic acid Faradaic efficiency.

Description

technical field [0001] The invention belongs to the field of carbon dioxide electrocatalytic reduction electrode and its preparation and application, in particular to a copper-doped bismuth bimetallic material and its preparation and application. Background technique [0002] As the greatest challenges of this century, environmental pollution and energy crisis have attracted widespread attention [Nat.Commun.5, 4948(2014)]. CO 2 Electrochemical reduction into high value-added fuels and chemicals is considered to be an effective way to alleviate environmental problems (global warming and climate change) and store intermittent renewable energy (wind and solar energy) [Chem.Soc.Rev.45,631-675 (2014)]. However, the direct conversion of CO2 to hydrocarbons requires the development of electrocatalysts with high selectivity, high activity, and high stability [Nat. Although a large number of studies have confirmed that the CO 2 It is reduced to a C2 product with high industrial v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/031C25B11/054C25B11/061C25B11/091C25D3/56C25B3/07C25B3/26C25B3/25
CPCC25D3/56B01J23/8437C25B3/25C25B11/057C25B11/031C25B11/091B01J35/33
Inventor 乔锦丽彭芦苇王永霞刘佩璇王耀峰周博
Owner DONGHUA UNIV
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