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High-performance subcarbonate electrolyzed water catalyst as well as preparation method and application thereof

A technology for electrolyzing water and catalysts, applied in chemical instruments and methods, physical/chemical process catalysts, electrolysis processes, etc., can solve problems such as price difference, catalyst activity needs to be improved, stability limitations, etc., and achieve low cost and excellent electrolysis Hydrogen evolution performance of water, oxygen evolution performance of electrolyzed water, and effect of low industrial production cost

Inactive Publication Date: 2017-08-18
INST OF CHEM CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The high price and relatively poor stability of noble metal catalysts limit the industrial development of electrolyzed water, but in recent years, non-noble metal catalysts have been developed rapidly, and transition metals (iron, cobalt, nickel, manganese, molybdenum, tungsten, etc.) Compounds, hydroxides, phosphides, sulfides, etc. have been widely studied, however, the activity of these catalysts still needs to be improved

Method used

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  • High-performance subcarbonate electrolyzed water catalyst as well as preparation method and application thereof
  • High-performance subcarbonate electrolyzed water catalyst as well as preparation method and application thereof
  • High-performance subcarbonate electrolyzed water catalyst as well as preparation method and application thereof

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Effect test

Embodiment 1

[0035] Embodiment 1, preparation cobalt manganese basic carbonate electrolytic water catalyst

[0036] 2 mmol of cobalt acetate, 2 mmol of manganese acetate and 250 mg of hexamethylenetetramine were dissolved in a mixed solution of 13 ml of ethylene glycol and 14 ml of ethanol, and uniformly stirred for 30 minutes to obtain a uniform and clear solution. Then transfer this solution to a 50 ml polytetrafluoroethylene reactor, and place a 2 cm x 4 cm foamed nickel substrate in it, then tighten the outer lining of the reactor, and place it in an oven to heat it to 170 degrees Celsius And keep it warm for 8 hours, stop heating and cool down to room temperature naturally, take out the nickel foam in the reactor and rinse it with ethanol for 3 times and then place it in a vacuum drying oven and dry it for 6 hours to obtain the cobalt-manganese basic carbonate with uniform growth. Nickel foam with nanosheet arrays can be directly used in electrodes for total water splitting.

[0037]...

Embodiment 2

[0056] Embodiment 2, preparation basic cobalt carbonate electrolysis water catalyst

[0057] Basically prepare the electrolytic water catalyst according to the same method as in Example 1, the difference is that the cobalt-manganese metal ratio is changed to cobalt: manganese-1:0, and the obtained catalyst is a flower-shaped cobalt basic carbonate nanosheet array. Structure grown on nickel foam; total water splitting was tested in 1 molar potassium hydroxide solution to give a potential of 1.75 volts at 10 milliamperes per square centimeter.

Embodiment 3

[0058] Embodiment 3, preparation iron cobalt basic carbonate electrolytic water catalyst

[0059] Prepare electrolytic water catalyst basically according to the same method as Example 1, difference is that manganese acetate is replaced by iron acetate, and the catalyst obtained is that the array array of iron-cobalt basic carbonate nanosheet grows on foamed nickel; 10 milliamperes per square centimeter corresponds to a potential of 1.70 volts when tested for total water decomposition in 1 mole per liter of potassium hydroxide solution.

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Abstract

The invention discloses a high-performance subcarbonate electrolyzed water catalyst as well as a preparation method and application thereof. The catalyst is an electrolyzed water catalyst, is a transition metal cobaltous dihydroxycarbonate nanosheet array which directly grows on a foam metal substrate by a solvothermal method and has excellent electrolyzed water hydrogen evolution property and electrolyzed water oxygen evolution property; the subcarbonate electrolyzed water catalyst can be directly used for a hydrogen evolution electrode and an oxygen evolution electrode in a water electrolyzing device; the electrolyzed water catalyst prepared by the preparation method disclosed by the invention has excellent catalytic performance; compared with other traditional non-noble metal catalysts reported in the literature, the high-performance subcarbonate electrolyzed water catalyst has higher total water decomposition activity. The method disclosed by the invention has the advantages of simple process, economy, convenience in operation, easiness in large-scale production and huge potential application value in many industrial catalyst fields or other scientific fields.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a high-performance basic carbonate electrolytic water catalyst and its preparation method and application. Background technique [0002] As the cornerstone of various production activities in human society, energy is the most important driving force for the development of human productivity. From ancient times to the present, fossil energy has been the main source of energy used by human beings, and its consumption rate has become faster and faster with the development of human beings. Especially since entering the industrialized society, the existing reserves will be exhausted within a few centuries. The increasing rate of fossil energy consumption and the increasingly serious environmental pollution problems have aroused widespread public concern. Therefore, it is imperative to develop a sustainable alternative energy source. Among these methods to solve energy problems, t...

Claims

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Application Information

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IPC IPC(8): B01J27/236C25B1/04C25B11/06
CPCC25B1/04B01J27/236C25B11/051B01J35/50B01J35/33Y02E60/36
Inventor 胡劲松唐堂
Owner INST OF CHEM CHINESE ACAD OF SCI
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