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Cobalt-based coordination polymers and their use as catalysts for electrocatalytic hydrogen production

A coordination polymer and cobalt-based technology, which is applied in the field of preparation of cobalt-based metal coordination polymer materials, can solve the problems that the binding firmness and stability affect the catalytic ability of the catalyst, the reduction of active sites, etc., and achieve excellent electrocatalysis Decomposition of water and hydrogen evolution, good crystallinity, easy separation and cleaning effect

Active Publication Date: 2021-06-18
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the compounding of coordination polymers and conductive materials can partially solve the problem of material conductivity to a certain extent, but there are also many problems that follow: such as the reduction of active sites after compounding, the combination of composite components Firmness and stability will also affect the catalytic ability of the catalyst

Method used

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  • Cobalt-based coordination polymers and their use as catalysts for electrocatalytic hydrogen production
  • Cobalt-based coordination polymers and their use as catalysts for electrocatalytic hydrogen production
  • Cobalt-based coordination polymers and their use as catalysts for electrocatalytic hydrogen production

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Take 0.1 mmol of cobalt perchlorate hexahydrate and 0.05 mmol of 3-(pyridin-4'-yl)-5-(4''-carbonylphenyl)-1,2,4-triazolyl (Hpycz) into a beaker 5.5mL of acetonitrile, 0.5mL of DMF, and 0.5mL of NaOH (0.1M) solution were added to it, and placed in a sonicator to sonicate evenly. Transfer the homogeneous solution prepared above to a polytetrafluoroethylene reactor and put it in a constant temperature oven at 160°C for 72 hours, then cool it down to room temperature for 12 hours to obtain purple blocky crystals, and wash them with absolute ethanol and deionized water After washing the material, put it into an 80°C drying oven to dry, and then the electrocatalyst [Co(pycz) of the present invention can be obtained. 2 )] n . The crystal form of the material synthesized under this condition is good, the size is uniform, and it is consistent with the XRD of the theoretical simulation of the crystal (such as image 3 As shown, it can be concluded from the figure that the expe...

Embodiment 2

[0026] Take 0.1 mmol of cobalt perchlorate hexahydrate and 0.025 mmol of 3-(pyridin-4'-yl)-5-(4''-carbonylphenyl)-1,2,4-triazolyl (Hpycz) into a beaker 5.5mL of acetonitrile, 0.5mL of DMF, and 0.5mL of NaOH (0.1M) solution were added to it, and placed in a sonicator to sonicate evenly. Transfer the homogeneous solution prepared above to a polytetrafluoroethylene reactor and put it in a constant temperature oven at 160°C for 72 hours, then cool it down to room temperature for 12 hours to obtain purple blocky crystals, and wash them with absolute ethanol and deionized water After washing the material, put it into an 80°C drying oven to dry, and then the electrocatalyst [Co(pycz) of the present invention can be obtained. 2 )] n .

Embodiment 3

[0028] Take 0.1 mmol of cobalt perchlorate hexahydrate and 0.05 mmol of 3-(pyridin-4'-yl)-5-(4''-carbonylphenyl)-1,2,4-triazolyl (Hpycz) into a beaker 5.5mL of acetonitrile, 0.5mL of DMF, and 0.5mL of NaOH (0.1M) solution were added to it, and placed in a sonicator to sonicate evenly. The homogeneous solution prepared above was transferred to a polytetrafluoroethylene reactor and placed in a constant temperature oven at 140°C to react for 72 hours, and then cooled to room temperature for 12 hours to obtain purple blocky crystals, which were washed with absolute ethanol and deionized water After washing the material, put it into an 80°C drying oven to dry, and then the electrocatalyst [Co(pycz) of the present invention can be obtained. 2 )] n .

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Abstract

The invention discloses a preparation method of a cobalt-based coordination polymer material and its application in electrocatalytic decomposition of water to produce hydrogen. The present invention uses cobalt perchlorate, 3-(pyridine-4'-yl)-5-(4''-carbonylphenyl)-1,2,4-triazolyl (Hpycz) and NaOH as raw materials in acetonitrile and Solvothermal synthesis in DMF afforded purple blocky crystals. As a catalyst, the crystal obtained by this method has a certain ability of electrolyzing water to produce hydrogen, and the crystal obtained at a current density of 10mV cm ‑2 When the hydrogen evolution potential is 223mV, the Tafel slope is 121mV dec ‑1 . The invention has the advantages that: the metal-organic framework material has relatively simple synthesis process, high crystal purity, and good electrocatalytic hydrogen evolution performance, and provides a new method for finding low-price, high-efficiency electrocatalytic hydrogen production catalysts .

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a preparation method of a cobalt-based metal coordination polymer material and its application in electrocatalytic hydrogen production. Background technique [0002] The development of clean and renewable energy materials is an effective way to solve the problems of environmental pollution and energy shortage caused by the consumption of traditional fossil energy. As a green, clean and efficient renewable energy, hydrogen energy has become the most ideal fuel that people pay attention to due to its many advantages such as high specific energy, good combustion performance, only water and no pollution. People generally produce hydrogen through photolysis of water, electrolysis of water, coal hydrogen production, oil hydrogen production and natural gas hydrogen production. At present, the latter three can produce hydrogen on a large scale in an industrial scale. Ov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00B01J31/22C25B1/04C25B11/085
CPCC08G83/008B01J31/1691B01J31/2243C25B1/04C25B11/04B01J2531/845B01J35/33Y02E60/36
Inventor 赵君周毅成董文文吴亚盘李东升张其春卜贤辉
Owner CHINA THREE GORGES UNIV