Method for preparing 2,5-furan dicarboxylic acid through electro-catalytic oxidation of 5-hydroxymethylfurfural by hydrotalcite-based layered catalyst

A technology of hydroxymethyl furfural and electrocatalytic oxidation, applied in the fields of chemical materials, energy saving and environmental protection, can solve the problems of harsh reaction conditions, high reaction temperature, high cost, etc. The effect of low potential

Active Publication Date: 2020-07-31
SUN YAT SEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the traditional catalytic oxidation method of 5-hydroxymethylfurfural currently used has limitations, mainly in that the reaction temperature is high and the participation of high-pressure gas is required, and the catalysts used are noble

Method used

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  • Method for preparing 2,5-furan dicarboxylic acid through electro-catalytic oxidation of 5-hydroxymethylfurfural by hydrotalcite-based layered catalyst
  • Method for preparing 2,5-furan dicarboxylic acid through electro-catalytic oxidation of 5-hydroxymethylfurfural by hydrotalcite-based layered catalyst
  • Method for preparing 2,5-furan dicarboxylic acid through electro-catalytic oxidation of 5-hydroxymethylfurfural by hydrotalcite-based layered catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] NiCoFe-LDHs layered catalyst materials were prepared by traditional co-precipitation method. Equipped with 0.5 M Ni respectively 2+ , 0.5 M Co 2+ , 1.0 M Fe 3+ , 1.0 M NaOH and 0.1 M Na 2 CO 3 The solution is stored in a Teflon bottle. When used, take 1.5 mL 0.5 M Ni respectively 2+ , 1.5 mL 0.5 M Co 2+ and 0.75 mL of 1.0 M Fe 3+Place in a 10 mL beaker for ultrasonic mixing for 20 min, then take an appropriate amount of 1.0 M NaOH and 0.1 M Na2CO3 solution (volume ratio 2: 1) and place in another beaker for ultrasonic mixing for 20 min. Then pour the two mixed solutions into the acid-base burette respectively and complete the titration in the four-neck round bottom flask. Before titration, pour 20 mL of ultrapure water into the four-neck flask and put it into a pH meter, and add magnetic stirring at the same time. , the stirring speed increases with the progress of the titration, and the pH at the end of the titration is about 9.5. After the titration was compl...

Embodiment 2

[0037] The NiCoFe-LDHs layered catalyst material prepared in Example 1 was used.

[0038] Electrocatalytic oxygen generation performance test:

[0039] In order to study the electrocatalytic oxygen production performance of the catalyst material, the Multi Autolab M204 electrochemical workstation was used to test the traditional three-electrode system. The NiCoFe-LDHs nanosheet loaded on the CFP is directly used as the working electrode, the Ag / AgCl electrode is used as the reference electrode, the platinum wire electrode is used as the counter electrode, and the electrolytic cell is a double-chamber cell with a DuPont proton exchange membrane in the middle. The solution was 1 M NaOH and 1 mM 5-hydroxymethylfurfural solution. In order to facilitate the comparison of OER catalytic performance, the reference potential of the test is converted into a reversible hydrogen electrode potential according to the following formula: E RHE =E Ag / AgCl +0.059*pH+E 0 Ag / AgCl . Before t...

Embodiment 3

[0043] Using the NiCoFe-LDHs layered catalyst material prepared in Example 1, at 35°C, the performance test of electrocatalytic oxidation of 1mM 5-hydroxymethylfurfural:

[0044] Using the Multi Autolab M204 electrochemical workstation, the test was carried out through the traditional three-electrode system. The NiCoFe-LDHs nanosheet loaded on the CFP is directly used as the working electrode, the Ag / AgCl electrode is used as the reference electrode, the platinum wire electrode is used as the counter electrode, and the electrolytic cell is a double-chamber cell with a DuPont proton exchange membrane in the middle. The solution was 1 M NaOH and 1 mM 5-hydroxymethylfurfural solution, and the scanning speed was 10 mV s -1 , the scanning range is from 0 to 0.8 V (vs. the reference electrode), and the electrocatalytic oxidation reaction temperature is 35 °C. To facilitate the comparison of OER catalytic performance, the tested reference potential was converted to the reversible hy...

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Abstract

The invention discloses a method for preparing 2,5-furan dicarboxylic acid through electro-catalytic oxidation of 5-hydroxymethylfurfural by a hydrotalcite-based layered catalyst. The method comprisesthe following steps: taking carbon fiber paper as a carrier, loading a layered hydroxide material on the carbon fiber paper through a hydrothermal reaction to serve as a working electrode, and implementing electro-catalytic oxidation by using a three-electrode system, thereby obtaining 2,5-furan dicarboxylic acid. The method has the following advantages: (1) the layered hydroxide catalyst is directly prepared by using a coprecipitation method, the synthesis method is simple and feasible, high-temperature calcination or high-pressure gas is not needed, and the energy consumption is low; (2) the carbon fiber paper is directly used as a substrate and has good contact with a catalyst material, so that the conductivity and the electron transmission efficiency are improved, and the cycling stability and the durability of the material are improved; and (3) the layered hydroxide material has an electro-catalytic oxidation performance on a biomass monomer, completes selective oxidation in a short time, and has excellent electro-catalytic oxygen production activity.

Description

technical field [0001] The invention relates to a method for preparing 2,5-furandicarboxylic acid by electrocatalytically oxidizing 5-hydroxymethylfurfural with a hydrotalcite-based layered catalyst, and belongs to the technical field of chemical materials and the field of energy conservation and environmental protection. Background technique [0002] With the excessive exploitation and unrestrained use of traditional fossil energy, the energy crisis and environmental problems are becoming more and more serious in today's society, threatening the natural environment and human survival. Therefore, it is imminent for people to study sustainable and renewable new energy strategies to replace traditional non-renewable energy sources. [0003] Biomass, as the only renewable non-petroleum-based carbon source, is an attractive alternative to fossil energy, and its conversion to new energy sources from biomass has also received attention. 5-Hydroxymethylfurfural (5-hydroxymethylfur...

Claims

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Application Information

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IPC IPC(8): C25B3/02C25B11/06B01J23/889B01J23/755C25B3/23
CPCC25B11/04B01J23/007B01J35/0033B01J23/8892B01J23/755C25B3/23
Inventor 严凯刘雨倩张曼
Owner SUN YAT SEN UNIV
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