Search

CN-121976205-A - Preparation of nickel-based electrode and method for electrocatalytic oxidation of 5-hydroxymethylfurfural by using nickel-based electrode

CN121976205ACN 121976205 ACN121976205 ACN 121976205ACN-121976205-A

Abstract

The invention relates to a preparation method of a nickel-based electrode and a method for electrocatalytically oxidizing 5-Hydroxymethylfurfural (HMF). The nickel-based electrode comprises a substrate material and a catalytic layer, wherein the catalytic layer is nickel hydroxide or chromium-doped nickel hydroxide with different forms. The chromium-doped nickel hydroxide electrode can greatly improve the catalytic performance of the electro-oxidation of HMF into 2, 5-dimethyl Furane (FDCA). The nickel-based electrode is used as an anodic oxidation electrode, metal platinum is used as a cathode electrode, the nickel-based electrode is respectively arranged at two sides of a double-chamber electrolytic cell separated by an ion exchange membrane, alkaline electrolyte is added at two sides of the electrolytic cell, and HMF solution is added at the anode side. The electrocatalytic oxidation method is carried out in the electrolytic tank under a certain voltage, HMF electrooxidation reaction is carried out on the anode and converted into FDCA, and electrolytic water hydrogen evolution reaction is carried out on the cathode. The invention can realize the high-efficiency electrocatalytic oxidation of HMF to FDCA by the nickel-based catalyst, and has excellent catalytic efficiency and stability by coupling with the electrolytic water hydrogen evolution reaction.

Inventors

  • TIAN JING
  • ZHAO JIN
  • LU SHENGZHAO

Assignees

  • 广西民族大学

Dates

Publication Date
20260505
Application Date
20260122

Claims (10)

  1. 1. The invention discloses a preparation method of a nickel-based electrode and a method for electrocatalytically oxidizing 5-hydroxymethylfurfural by using the same, which are characterized by comprising the following steps: placing a conductive substrate material into a metal salt solution for hydrothermal reaction to obtain a nickel-based catalytic electrode material with hydroxide; And taking the hydroxide nickel-based electrode material obtained by the hydrothermal reaction as an anode, taking a metal platinum material as a cathode, adding alkaline electrolyte at two sides of a double-chamber electrolytic tank separated by an ion exchange membrane, and simultaneously adding 5-hydroxymethylfurfural solution at the anode side for electrocatalytic oxidation reaction.
  2. 2. The catalytic electrode substrate material of claim 1, wherein the conductive substrate material is one of nickel mesh, nickel sheet, foam nickel, stainless steel mesh, titanium mesh.
  3. 3. The catalytic electrode substrate material of the nickel-based electrode manufacturing method according to claim 1, wherein the conductive substrate material is placed in a metal salt solution to perform the hydrothermal treatment step, further comprising the steps of: Cutting a conductive substrate into a proper specification, ultrasonically cleaning the conductive substrate in a 2mol/L hydrochloric acid solution for 5-15 min, sequentially putting the conductive substrate into deionized water and absolute ethyl alcohol, respectively ultrasonically cleaning the conductive substrate for 5-15 min, and drying the conductive substrate after cleaning.
  4. 4. The preparation method of the nickel-based electrode according to claim 1, wherein the metal salt solution is a mixed solution of nickel salt, chromium salt, urea and ammonium fluoride dissolved in deionized water, the concentration of the metal salt solution is 0.01 mol/L-0.1 mol/L, and the molar ratio of the total molar amount of metal ions to the precipitant is 1:1-1:5.
  5. 5. The preparation method of the nickel-based electrode according to claim 1-4, wherein the nickel salt is at least one selected from nickel nitrate, nickel chloride, nickel sulfate and nickel acetate, the chromium salt is at least one selected from chromium nitrate, chromium chloride, chromium sulfate and chromium acetate, the molar ratio of the concentration of the chromium salt to the concentration of the nickel salt is 1:2-1:10, and the precipitant is at least one or two selected from urea and ammonium fluoride.
  6. 6. The method for preparing the nickel-based electrode according to claim 1-4, wherein the hydrothermal synthesis reaction temperature is 120-150 ℃, and the hydrothermal reaction time is 12-18 h.
  7. 7. The application of the catalytic electrode material prepared by the preparation method of the nickel-based electrode according to any one of claims 1-6 in electrochemical catalytic reaction.
  8. 8. The method for preparing a nickel-based electrode and electrocatalytically oxidizing 5-hydroxymethylfurfural by using the same according to claim 1, wherein the working voltage of the double-chamber electrolytic tank is 1.1-1.9V.
  9. 9. The method for preparing a nickel-based electrode and performing electrocatalytic oxidation on 5-hydroxymethylfurfural according to any one of claims 1-8, wherein the electrolysis mode is constant voltage electrolysis, constant current electrolysis, step-by-step multi-voltage electrolysis or step-by-step multi-current electrolysis.
  10. 10. The method for preparing a nickel-based electrode and electrocatalytically oxidizing 5-hydroxymethylfurfural by using the same according to any one of claims 1 to 9, wherein the pH value of an alkaline electrolyte in a double-chamber electrolytic cell is 12 to 14.

Description

Preparation of nickel-based electrode and method for electrocatalytic oxidation of 5-hydroxymethylfurfural by using nickel-based electrode Technical Field The invention relates to the field of electrocatalytic materials, in particular to a preparation method of a nickel-based electrode and a method for electrocatalytically oxidizing 5-hydroxymethylfurfural by using the same. Background The development and utilization of clean energy are important research fields for achieving the strategic targets of carbon reaching peak, carbon neutralization, and aiming at the problems of regional distribution and unbalanced output of renewable clean energy in China, development of new technology for renewable energy development and efficient energy optimization clean utilization is urgently needed, electrochemical energy storage in substance conversion is expected to provide an effective solution, and electrocatalytic is a key reaction process in the technology. The synthesis and the increment of chemicals are realized in the electrocatalytic process, so that the method is a way for stably storing renewable energy sources, and can directly convert electric energy into chemicals with high added value. Biomass is a carrier with both resource and energy characteristics, and by conversion, biomass can be derived into a range of high-value chemicals that can replace fossil products. 2, 5-furandicarboxylic acid (FDCA) is used as one of 12 biomass-based platform compounds with the highest potential, has a conjugated carbocycle and diacid structure similar to petroleum-based terephthalic acid (TPA), can replace TPA to be used for synthesizing degradable biomass-based ethylene furandicarboxylic acid (PEF) with better heat stability and gas barrier property, and greatly reduces the serious dependence of the polyester industry on fossil resources and reduces the environmental pollution problem caused by refractory high polymer materials. Polyethylene terephthalate (PET) produced worldwide from petroleum-based TPA in 2023 yields approaching 9000 ten thousand tons, PEF has a strong market demand as a potential alternative to PET. FDCA can be synthesized through electrocatalytic oxidation of 5-Hydroxymethylfurfural (HMF), and development of an efficient biomass electrocatalytic conversion technology is particularly necessary. The key point of the electrocatalytic conversion is whether an electrocatalytic catalyst which is high in activity, good in stability, low in cost and easy to obtain exists, so that an electrode material which is good in catalytic effect and high in catalytic efficiency of non-noble transition metal can be developed. Disclosure of Invention The invention provides a preparation method of a nickel-based electrode and a method for electrocatalytically oxidizing 5-hydroxymethylfurfural, which can prepare a chromium-doped nickel-based catalytic electrode, can efficiently electrocatalytically oxidize 5-hydroxymethylfurfural into 2, 5-furandicarboxylic acid, and has great significance for high-quality utilization of biomass resources. In order to achieve the above object, the technical scheme of the present invention is as follows. The invention discloses a preparation method of a nickel-based electrode and a method for electrocatalytically oxidizing 5-hydroxymethylfurfural by using the same, which are characterized by comprising the following steps: placing a conductive substrate material into a metal salt solution for hydrothermal reaction to obtain a nickel-based catalytic electrode material with hydroxide; And taking the hydroxide nickel-based electrode material obtained by the hydrothermal reaction as an anode, taking a metal platinum material as a cathode, adding alkaline electrolyte at two sides of a double-chamber electrolytic tank separated by an ion exchange membrane, and simultaneously adding 5-hydroxymethylfurfural solution at the anode side for electrocatalytic oxidation reaction. In one embodiment, the conductive base material is one of nickel mesh, nickel sheet, foam nickel, stainless steel mesh, titanium mesh. In one embodiment, the conductive substrate material is placed in a metal salt solution to be subjected to a hydrothermal treatment step, and the method further comprises the steps of cutting the conductive substrate into applicable specifications, ultrasonically cleaning the conductive substrate in a 2mol/L hydrochloric acid solution for 5-15 min, sequentially placing the conductive substrate in deionized water and absolute ethyl alcohol for 5-15 min respectively, and drying after cleaning. In one embodiment, the metal salt solution is a mixed solution of nickel salt, chromium salt, urea and ammonium fluoride dissolved in deionized water, wherein the concentration of the metal salt solution is 0.01-0.1 mol/L, and the molar ratio of the total molar amount of metal ions to the precipitant is 1:1-1:5. In one embodiment, the nickel salt is selected from at least one of nickel nitrate, nickel chloride,