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Ammonia-etched sea-urchin-shaped spherical structure copper-manganese spinel material, preparation method and application thereof

A sea urchin-like, spinel technology, applied in electrolytic components, electrodes, electrolytic organic production, etc., can solve problems such as lack of stability, achieve excellent catalytic performance, reduce energy barriers, and accelerate transfer effects

Active Publication Date: 2021-06-29
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, reports have shown that NiFe LDHs lack stability in prolonged exposure to highly alkaline electrolyte solutions.

Method used

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  • Ammonia-etched sea-urchin-shaped spherical structure copper-manganese spinel material, preparation method and application thereof
  • Ammonia-etched sea-urchin-shaped spherical structure copper-manganese spinel material, preparation method and application thereof
  • Ammonia-etched sea-urchin-shaped spherical structure copper-manganese spinel material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A. Dissolve 2.0g copper acetate monohydrate, 4.9g manganese acetate tetrahydrate, 6g urea, 1g potassium bromate, and 0.6g ammonium fluoride in deionized water and stir evenly to form mixed solution A.

[0037] B. Transfer the mixed solution A into a 250ml Teflon-lined stainless steel autoclave, react at 160°C for 9 hours, and filter. Afterwards, the autoclave was naturally cooled to room temperature, filtered, and the filter cake was washed with deionized water until neutral, and then dried to obtain copper-manganese spinel precursor powder;

[0038] C. Transfer the precursor powder obtained in step B into a muffle furnace, and calcinate at 600°C for 3 hours to obtain a copper-manganese spinel powder with a sea urchin spherical structure, and its chemical expression is CuMn 2 o 4 .

[0039] D, the copper manganese spinel CuMn that step C obtains 2 o 4 The powder is evenly dispersed in 700ml of ammonia solution per gram; soaked at room temperature for 15 minutes, fil...

Embodiment 2

[0041] A. Dissolve 4.0g copper acetate monohydrate, 12.3g manganese acetate tetrahydrate, 11.9g urea, 1.9g potassium bromate, and 1.3g ammonium fluoride in deionized water and stir to form a mixed solution A.

[0042] B. Transfer the mixed solution A into a 250ml Teflon-lined stainless steel autoclave, react at 180°C for 7 hours, and filter. Afterwards, the autoclave was naturally cooled to room temperature, filtered, and the filter cake was washed with deionized water until neutral, and then dried to obtain copper-manganese spinel precursor powder;

[0043] C. Transfer the precursor powder obtained in step B into a muffle furnace, and calcine at 600°C for 4 hours to obtain a copper-manganese spinel powder with a sea urchin spherical structure, and its chemical expression is CuMn 2 o 4 .

[0044] D, the copper manganese spinel CuMn that step C obtains 2 o 4 The powder is evenly dispersed in 900ml of ammonia solution per gram; soaked at room temperature for 20 minutes, filt...

Embodiment 3

[0046] A. Dissolve 2.0g copper acetate monohydrate, 3.7g manganese acetate tetrahydrate, 5.4g urea, 0.8g potassium bromate, and 0.6g ammonium fluoride in deionized water and stir to form a mixed solution A.

[0047] B. Transfer the mixed solution A into a 250ml Teflon-lined stainless steel autoclave, react at 170°C for 8 hours, and filter. Afterwards, the autoclave was naturally cooled to room temperature, filtered, and the filter cake was washed with deionized water until neutral, and then dried to obtain copper-manganese spinel precursor powder;

[0048] C. Transfer the precursor powder obtained in step B into a muffle furnace, and calcine at 500°C for 4 hours to obtain a sea urchin-shaped spherical structure copper-manganese spinel powder, whose chemical expression is CuMn 2 o 4 .

[0049] D, the copper manganese spinel CuMn that step C obtains 2 o 4 The powder was uniformly dispersed in 700ml of ammonia solution per gram; soaked at room temperature for 8 minutes, filte...

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Abstract

The invention provides an ammonia-etched sea-urchin-shaped spherical structure copper-manganese spinel material, a preparation method and application thereof. The preparation method comprises the following steps: dissolving copper acetate monohydrate, manganese acetate tetrahydrate, urea, potassium bromate and ammonium fluoride in deionized water, uniformly mixing, and carrying out hydrothermal treatment and calcination to obtain precursor powder; and soaking in ammonia water to obtain the ammonia-etched copper-manganese spinel material CuMn2O4 / N. According to the invention, the chemical formula of the ammonia etching copper-manganese spinel material is shown as CuMn2O4 / N, the ammonia etching copper-manganese spinel material is of a sea urchin-shaped spherical structure, each spherical structure is composed of a nanoneedle structure which grows in the radial direction from a central core, the length of the nanoneedle is 100-150 nm, and the average diameter of the sea urchin-shaped spherical structure is 6-10 [mu]m; and when the material is used as an electrode material for generating furandicarboxylic acid through electro-catalytic oxidation of 5-hydroxymethylfurfural, excellent electro-catalytic performance is achieved.

Description

Technical field: [0001] The invention relates to the technical field of electrocatalytic oxidation of 5 hydroxymethylfurfural (HMF) electrode materials, in particular to an ammonia-etched sea urchin-shaped spherical structure copper-manganese spinel CuMn 2 o 4 And its preparation method and application. Background technique: [0002] In recent years, the wide application of furandicarboxylic acid in many fields has attracted considerable attention, especially as an important chemical base for the production of biochemical agents and also as a renewable alternative to terephthalic acid to form polyethylene terephthalate ester (PET) and polybutene (PBT), furandicarboxylic acid is listed as one of the top 12 biomass value-added chemicals. Therefore, the catalytic synthesis of furandicarboxylic acid has become a research hotspot. 5-Hydroxymethylfurfural (HMF) is considered as a key molecular platform that can be used as a raw material to produce various compounds with importa...

Claims

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Application Information

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IPC IPC(8): C25B11/077C25B3/23C25B3/07C25B3/05
Inventor 雷晓东祝彪秦洋蒋美红曹艳明刘湉窦彤
Owner BEIJING UNIV OF CHEM TECH
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