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A kind of preparation method of non-precious metal catalyst for hydroelectric desorption of oxygen

A non-precious metal and catalyst technology, which is applied in the field of preparation of non-precious metal catalysts, can solve the problems of cumbersome preparation methods, high oxygen evolution overpotential, and high cost, and achieve the effects of simple preparation methods, many surface defects, and high specific surface area

Active Publication Date: 2019-08-23
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The single-atom Pd electrolytic water catalyst prepared by Gianvito et al. [Angewandte Chemie, 2015, 5] is nearly twice as active as ordinary Pd catalysts, but it cannot be widely used due to the shortage of precious metal resources such as Pd and Pt, which are expensive
Chen et al [Angewandte Chemie,2017,56] used 2,2'-bipyridine and FeCl 3 , KSCN mixing and stirring method to prepare single-atom S,N-Fe / N / C-CNT catalyst, at a current density of 10mA·cm -2 Oxygen evolution overpotential is 370mV, but the preparation method is cumbersome, and the complete dispersion of iron cannot be achieved
They all have common problems in electrolyzing water: high oxygen evolution overpotential, high energy consumption for electrolyzing water, etc.

Method used

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  • A kind of preparation method of non-precious metal catalyst for hydroelectric desorption of oxygen
  • A kind of preparation method of non-precious metal catalyst for hydroelectric desorption of oxygen
  • A kind of preparation method of non-precious metal catalyst for hydroelectric desorption of oxygen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for preparing a non-noble metal catalyst for electrolysis of water, the operation steps are as follows:

[0034] (1) Weigh 1.3g of 2,6-diacetylpyridine into a flat-bottomed flask, add 50ml of absolute ethanol, stir until 2,6-diacetylpyridine is completely dissolved, then add 0.9g of 1,8-diacetylpyridine Aminonaphthalene, stir until 1,8-diaminonaphthalene is completely dissolved, add 0.1g oxalic acid as a catalyst, transfer to an oil bath and raise the temperature to 60°C for synthesis, keep stirring at this temperature for 12 hours, and naturally cool to room temperature;

[0035] (2) Add 2.15 g of ferric chloride hexahydrate while stirring in the solution obtained after cooling in step (1), and stir at room temperature for complexation for 12 hours;

[0036] (3) The solution obtained after the complexation in step (2) is removed by rotary evaporation to remove the solvent, and the remaining solid matter is placed in a blast drying oven and dried at 80° C. for ...

Embodiment 2

[0041] A method for preparing a non-noble metal catalyst for electrolysis of water, the operation steps are as follows:

[0042] (1) Weigh 1.0g of 1,3-diacetylbenzene into a single-necked flask, add 125ml of absolute ethanol, stir until 1,3-diacetylbenzene is completely dissolved, then add 0.9g of 2,6-diacetylbenzene Aminopyridine, stir until 2,6-diaminopyridine is completely dissolved, add 0.08g oxalic acid as a catalyst, transfer to an oil bath and raise the temperature to 25°C for synthesis, keep stirring at this temperature for 24 hours, then cool naturally to room temperature;

[0043] (2) Add 1.29 g of ferric chloride hexahydrate while stirring in the solution obtained after cooling in step (1), and stir at room temperature for complexation for 24 hours;

[0044] (3) The solution obtained after the complexation in step (2) is removed by rotary evaporation to remove the solvent, and the remaining solid matter is placed in a blast drying oven and dried at 90 ° C for 24 hou...

Embodiment 3

[0048] A method for preparing a non-noble metal catalyst for electrolysis of water, the operation steps are as follows:

[0049] (1) Weigh 1.0g of 4,4-diacetylbiphenyl into a single-necked flask, add 200ml of absolute ethanol, stir until 1,3-diacetylbiphenyl is completely dissolved, then add 0.78g of 2,3 -Diaminopyridine, stir until the 2,3-diaminopyridine is completely dissolved, add 0.05g oxalic acid as a catalyst, transfer to an oil bath and raise the temperature to 150°C for synthesis, keep stirring at this temperature for 6 hours, then cool naturally to room temperature ;

[0050] (2) Add 1.12 g of cobalt trichloride hexahydrate while stirring in the solution obtained after cooling in step (1), and stir at room temperature for complexation for 8 hours;

[0051] (3) The solution obtained after the complexation in step (2) is removed by rotary evaporation to remove the solvent, and the remaining solid matter is placed in a blast drying oven and dried at 100 ° C for 8 hours...

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Abstract

The invention discloses a preparation method of a water electrolysis oxygen evolution non-noble metal catalyst. The preparation method includes the steps that firstly, pyridine monomers I containing acyl or pyridine monomers I containing amidogen are added into a solvent, then monomers II containing amidogen or monomers II containing acyl and a catalyst are added in, and synthesis is performed by rising temperature; secondly, metal salt is added in, metal ions are added in for complexing, wherein according to the molar weight of the metal ions, the molar ratio of the metal ions to the pyridine monomers I containing acyl or the pyridine monomers I containing amidogen is 1-2: 1-2; thirdly, the solvent is removed, and the remaining obtained solid substances are dried for 8-24 hours at 80-100 DEG C; fourthly, mixed gas is introduced for heating, and primary heat treatment is performed; and fifthly, aftertreatment then is performed after temperature lowering, and the product is obtained. Active metal atoms of the non-noble metal catalyst prepared through the preparation method are evenly dispersed in a catalyst material, no metal-metal bonds exist, the metal utilizing rate reaches up to 100%, and the non-noble metal catalyst has the beneficial effects of being good in electric conduction performance, high in specific surface area, few in surface defect and the like.

Description

technical field [0001] The invention relates to a preparation method of a non-precious metal catalyst, in particular to a preparation method of a non-precious metal catalyst for water electrolysis oxygen. Background technique [0002] With the increasing global environmental pollution and the decrease of fossil fuels, the development and utilization of new energy and renewable energy have been highly valued by human beings. Hydrogen energy is called the future because of its environmental friendliness and high energy supply. most important source of energy. Hydrogen production by electrolysis of water is an important way to achieve industrialized and cheap production of hydrogen, but the biggest problem with this technology is the large power consumption, which makes the production cost high. The main reason for the large power consumption is that the process of water electrolysis is a process in which water produces hydrogen at the cathode and oxygen at the anode under the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/06C25B1/04
CPCC25B1/04C25B11/04Y02E60/36
Inventor 田植群吕丹丹沈培康刘宗张潇然王双宝尹诗斌
Owner GUANGXI UNIV
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