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Constant-current electro-deposition copper-based catalyst on carbon paper, preparation method of constant-current electro-deposition copper-based catalyst and application of constant-current electro-deposition copper-based catalyst in electro-catalysis of 4-ethynylaniline

A copper-based catalyst and electrodeposition technology, which is applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problem of expensive, etc., and achieve the effect of reducing costs, realizing economic benefits, and high economic benefits

Pending Publication Date: 2022-03-18
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Significant progress has been made in the traditional half-hydrogenation reaction, but there are few reports on the electrocatalytic alkyne half-hydrogenation, and it mainly relies on expensive noble metal catalysts, using H 2 or expensive and toxic sources of organic hydrogen, with serious cost, safety and environmental concerns

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  • Constant-current electro-deposition copper-based catalyst on carbon paper, preparation method of constant-current electro-deposition copper-based catalyst and application of constant-current electro-deposition copper-based catalyst in electro-catalysis of 4-ethynylaniline
  • Constant-current electro-deposition copper-based catalyst on carbon paper, preparation method of constant-current electro-deposition copper-based catalyst and application of constant-current electro-deposition copper-based catalyst in electro-catalysis of 4-ethynylaniline
  • Constant-current electro-deposition copper-based catalyst on carbon paper, preparation method of constant-current electro-deposition copper-based catalyst and application of constant-current electro-deposition copper-based catalyst in electro-catalysis of 4-ethynylaniline

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Embodiment 1

[0020] Preparation of copper-based catalysts: first, pre-treat the purchased commercial copper foam: wash with 3M hydrochloric acid, acetone, ethanol, and water for 10 min each, and then dry in an oven at 60°C; pre-treatment of carbon paper: cut the carbon paper into 1×2cm, soaked in nitric acid for 30min, rinsed with deionized water, dried, and burned in a muffle furnace at 400°C for 5h; 2M H 2 SO 4 12mL, 0.2M CuSO 4 , 20mL, mixed; get 10mL mixed solution as electrolyte, pretreated copper foam as counter electrode; carbon paper as working electrode, prepare copper-based catalyst on carbon paper by constant current electrodeposition, deposition conditions are - 0.05A, 80s, soak the deposited carbon paper in deionized water for 30min to remove inorganic salts, and then dry at room temperature to obtain a copper-based catalyst. The electrochemical workstation model is CHI 760E, the reference electrode is Ag / AgCl electrode, the linear sweep voltammetry scan parameters are rota...

Embodiment 2

[0025] Using water as hydrogen source, electrocatalytic semihydrogenation of alkynes to alkenes. H-type electrolytic cell is adopted, in the cathode electrolytic cell, the electrolyte is: 13.93ml 1M KOH; in the anode electrolytic cell, the electrolyte is 15ml 1M KOH solution. The cathode and anode electrolytic cells are connected by a proton exchange membrane. The electrocatalytic reaction was carried out in the cathodic electrolytic cell. The electrolytic substrate was 2.4mg 4-ethynyl aniline, which was dissolved in KOH solution after adding 1.07ml of co-solvent 1,4-dioxane, and the electrochemical experiment was carried out. The electrocatalytic 4 -Ethynylaniline yields 4-vinylaniline. The electrochemical workstation model is CHI 760E, the reference electrode is Ag / AgCl electrode, the counter electrode is carbon rod, the deposited copper-based catalyst is the working electrode, and the linear sweep voltammetry scan parameters are rotation rate 1600rpm and scan rate 10mV s ...

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Abstract

The invention relates to the technical field of catalysts, in particular to a constant-current electro-deposition copper-based catalyst on carbon paper, a preparation method of the constant-current electro-deposition copper-based catalyst and application of the constant-current electro-deposition copper-based catalyst in electro-catalysis of 4-ethynylaniline. The preparation method comprises the following steps: cleaning and drying foamy copper, soaking carbon paper in nitric acid, cleaning, drying and calcining; h2SO4 and CuSO4 are mixed, and a mixed solution is obtained; foamy copper is used as a counter electrode, carbon paper is used as a working electrode, the mixed solution is used as electrolyte, and the copper-based catalyst is obtained through electro-deposition on the carbon paper through constant-current deposition. According to the copper-based catalyst, water serves as a hydrogen source, alkyne is reduced through hydrogen generated by electrolyzing water, the hydrogen which is not easy to store and transport can be effectively utilized, and H2 or a toxic hydrogen source can be avoided. By using the cheap metal catalyst to catalyze alkyne semi-hydrogenation, the cost can be reduced, and high economic benefits can be realized.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a constant-current electrodeposition copper-based catalyst on carbon paper, a preparation method thereof, and an application in electrocatalysis of 4-ethynylaniline. Background technique [0002] Selective hydrogenation is at the heart of the industrial production of fine chemicals, pharmaceuticals, food and agrochemicals. The selective semihydrogenation of alkynes can produce olefin products with high added value, which is very important in chemical production. Significant progress has been made in traditional semihydrogenation reactions, but there are few reports on electrocatalytic alkyne semihydrogenation, and it mainly relies on expensive noble metal catalysts, using H 2 Or expensive and toxic sources of organic hydrogen, which have serious problems in terms of cost, safety and environment. Contents of the invention [0003] The present invention prepares a copper-base...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/075C25B11/052C25B11/065C25D3/38C25D5/54C25B3/25C25B3/09
CPCC25B11/075C25B11/052C25B11/065C25D3/38C25D5/54C25B3/25C25B3/09
Inventor 姜毅李冉夏立新
Owner LIAONING UNIVERSITY