Copper-based catalyst for preparing ethyl alcoholby electrocatalytic reduction of carbon dioxide, and preparation method and application thereof

A copper-based catalyst, carbon dioxide technology, applied in electrodes, electrolysis components, electrolysis process, etc., can solve the problems of ethanol selectivity and current density that have not been reported in research

Active Publication Date: 2021-07-06
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although ethanol has the advantages of high energy density (26.8MJ / kg) and easy storage and transportation, there are still great challenges in the high selectivity and high current density of electrocatalytic reduction of carbon dioxide to ethanol. High ethanol selectivity and current density

Method used

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  • Copper-based catalyst for preparing ethyl alcoholby electrocatalytic reduction of carbon dioxide, and preparation method and application thereof
  • Copper-based catalyst for preparing ethyl alcoholby electrocatalytic reduction of carbon dioxide, and preparation method and application thereof
  • Copper-based catalyst for preparing ethyl alcoholby electrocatalytic reduction of carbon dioxide, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Step 1: Accurately weigh 23.8 mg of copper chloride dihydrate and dissolve in 50 mL of water to form precursor solution A; weigh 21.5 mg of chloroauric acid and dissolve in 50 mL of water to form precursor solution B.

[0046] Step 2: Under stirring, add 200 μL of PDDA dropwise to the precursor solution A in step 1 to form solution C; under stirring, add 750 μL of 0.1M sodium citrate solution dropwise to the precursor in step 1 In solution B, solution D was formed; 47 mg of sodium borohydride was weighed and dissolved in 15 mL of ice water to form solution E, and 4.6 mg of sodium borohydride was weighed and dissolved in 15 mL of ice water to form solution F.

[0047] Step 3: Add solution E in step 2 dropwise to solution C in step 2 under Ar atmosphere and stirring in an ice bath, stir for 2 hours to form solution G, and add solution F in step 2 to solution D dropwise , stirred for 2 h to form solution H.

[0048] Step 4: After the stirring is finished, add solution G i...

Embodiment 2

[0054] Step 1: Accurately weigh 47.6 mg of copper chloride dihydrate and dissolve in 50 mL of water to form precursor solution A; weigh 43.3 mg of chloroauric acid and dissolve in 50 mL of water to form precursor solution B.

[0055] Step 2: Under stirring, add 200 μL of PDDA solution dropwise to precursor solution A in step 1 to form solution C; under stirring, add 750 μL of 0.1M sodium citrate solution dropwise to the precursor in step 1 94 mg of sodium borohydride was dissolved in 15 mL of ice water to form solution E, and 9.2 mg of sodium borohydride was weighed and dissolved in 15 mL of ice water to form solution F.

[0056] Step 3: Under the conditions of Ar atmosphere and ice bath stirring, add solution E in step 2 dropwise to solution C in step 2, stir for 2 hours to form solution G, and add solution F in step 2 dropwise to solution D1 , stirred for 2 h to form solution H.

[0057] Step 4: After the stirring is finished, add solution G in step 3 dropwise to solution H...

Embodiment 3

[0063] Step 1: Accurately weigh 71.5 mg of copper chloride dihydrate and dissolve in 50 mL of water to form precursor solution A; weigh 64.9 mg of chloroauric acid and dissolve in 50 mL of water to form precursor solution B.

[0064] Step 2: Under stirring, add 200 μL of PDDA solution dropwise to precursor solution A in step 1 to form solution C; under stirring, add 750 μL of 0.1M sodium citrate solution dropwise to the precursor in step 1 141.8 mg sodium borohydride was weighed and dissolved in 15 mL ice water to form solution E, and 46.1 mg was weighed and dissolved in 15 mL ice water to form solution F.

[0065] Step 3: Add solution E in step 2 dropwise to solution C in step 2 under Ar atmosphere and stirring in an ice bath, stir for 2 hours to form solution G, and add solution F in step 2 to solution D dropwise , stirred for 2 h to form solution H.

[0066] Step 4: After the stirring is finished, add solution G in step 3 dropwise to solution H in step 3, and stir for 2 ho...

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Abstract

The invention relates to a copper-based catalyst for preparing ethanol by electrocatalytic reduction of carbon dioxide, and a preparation method and application thereof. The catalyst is a supported bimetallic copper-based catalyst; and the carrier is a carbon material or a metal material, and the active substance is a gold-copper heterojunction. According to the preparation method, the carbon material or the metal material is used as the carrier, sodium citrate and PDDA are used as stabilizers, the binary metal copper-based catalyst is prepared through an electrostatic self-assembly method, and the obtained catalyst has a gold-copper binary heterojunction. According to the invention, the binary catalyst with different contact structures can be prepared by regulating and controlling the surface coating of the metal particles only by regulating and changing the variety and the dosage of the stabilizer, and the catalyst shows very high selectivity on preparation of ethanol by electrocatalytic reduction of carbon dioxide.

Description

technical field [0001] The invention relates to a preparation method of a high-performance copper-based catalyst for electrocatalytic reduction of carbon dioxide, and a method for preparing ethanol by using the catalyst for electrocatalytic reduction of carbon dioxide. Background technique [0002] In recent years, problems such as energy crisis and global warming have become more and more prominent, and it is imminent to seek sustainable development technologies with economic benefits. Electrocatalytic reduction of carbon dioxide technology is favored by people as a way to use renewable energy to drive the reduction of greenhouse gas carbon dioxide to prepare a variety of fuels and chemicals. Among the various products of electrocatalytic reduction of carbon dioxide, compared with C 1 Products (such as CO and formate, etc.), ethylene, ethanol, etc. C 2+ The products have attracted widespread attention because of their higher energy efficiency and greater global market val...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B3/03C25B3/26C25B11/091
Inventor 张生马新宾况思宇刘海
Owner TIANJIN UNIV
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