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Preparation method of MOF-derived CoP hydrogen evolution catalyst

A catalyst and hydrogen evolution technology, applied in the direction of electrolysis components, electrodes, electrolysis process, etc., to achieve the effects of easy scale-up and industrial production, good conductivity and high stability

Inactive Publication Date: 2021-08-17
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there is no report on the method of obtaining MOF-derived CoP hydrogen evolution catalyst by calcining the prepared ZIF-67 and cobalt nitrate hexahydrate in an oil bath to produce tricobalt tetroxide and then phosphating

Method used

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  • Preparation method of MOF-derived CoP hydrogen evolution catalyst
  • Preparation method of MOF-derived CoP hydrogen evolution catalyst
  • Preparation method of MOF-derived CoP hydrogen evolution catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0012] Weigh 2.05g of 2-methylimidazole and dissolve in 50mL of anhydrous methanol, and dissolve 0.703g of cobalt nitrate hexahydrate in 50mL of anhydrous methanol. After mixing evenly, sonicate for 30min, let stand for 18h and then centrifuge to generate ZIF-67 nanoparticles. (2) After 0.1 g of ZIF-67 and 0.1 g of cobalt nitrate hexahydrate were dissolved in 50 mL of ethanol, the mixture was refluxed and stirred in an oil bath at 90 °C for 1 h, then centrifuged with ethanol several times and dried at 60 °C to obtain ZIF-67@Co. (3) The obtained ZIF-67@Co was air-fired at a heating rate of 2°C / min, kept at 120°C for 1 hour, and kept at 350°C for 2 hours to obtain tricobalt tetroxide. (4) Phosphating treatment was carried out in a tube furnace at a heating rate of 2°C / min, 1h at 120°C and 1h at 350°C to obtain a MOF-derived CoP hydrogen evolution catalyst.

Embodiment 2

[0014] Weigh 2.05g of 2-methylimidazole and dissolve in 50mL of anhydrous methanol, and dissolve 0.703g of cobalt nitrate hexahydrate in 50mL of anhydrous methanol. After mixing evenly, sonicate for 30min, let stand for 18h and then centrifuge to generate ZIF-67 nanoparticles. (2) After 0.1 g of ZIF-67 and 0.1 g of cobalt nitrate hexahydrate were dissolved in 50 mL of ethanol, the mixture was refluxed and stirred in an oil bath at 90 °C for 1 h, then centrifuged with ethanol several times and dried at 60 °C to obtain ZIF-67@Co. (3) Phosphating treatment was carried out in a tube furnace with a heating rate of 2°C / min, 120°C for 1h, and 350°C for 1h to obtain Co-MOF / CoP.

Embodiment 3

[0016] Weigh 2.05g of 2-methylimidazole and dissolve in 50mL of anhydrous methanol, and dissolve 0.703g of cobalt nitrate hexahydrate in 50mL of anhydrous methanol. After mixing evenly, sonicate for 30min, let stand for 18h and then centrifuge to generate ZIF-67 nanoparticles. (2) The obtained ZIF-67 nanoparticles were air-fired at a heating rate of 2°C / min, kept at 120°C for 1 hour, and kept at 350°C for 2 hours to obtain tricobalt tetroxide. (4) Perform phosphating treatment in a tube furnace with a heating rate of 2°C / min, hold at 120°C for 1 hour, and hold at 350°C for 1 hour to obtain Co 3 o 4 / CoP.

[0017] From the test results of the MOF-derived CoP hydrogen evolution catalyst obtained in the present invention, the MOF-derived CoP hydrogen evolution catalyst obtained in the present invention has the advantages of high hydrogen evolution activity, good conductivity, and high stability under acidic conditions.

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Abstract

The invention provides a preparation method of an MOF-derived CoP hydrogen evolution catalyst, and particularly relates to a method which comprises the following steps: firstly, preparing an MOF structure ZIF-67, then carrying out oil bath on the ZIF-67 and cobalt nitrate hexahydrate to generate ZIF-67@Co, then calcining the ZIF-67 or the ZIF-67@Co to generate cobaltosic oxide and then performing phosphorizing or directly performing phosphorizing to obtain the MOF-derived CoP hydrogen evolution catalyst. The MOF-derived CoP hydrogen evolution catalyst prepared by the method disclosed by the invention has relatively high electro-catalytic hydrogen evolution activity and stability.

Description

technical field [0001] The present invention relates to a preparation method of a MOF-derived CoP hydrogen evolution catalyst. Specifically, the first step is to prepare ZIF-67 with MOF structure, and then ZIF-67 and cobalt nitrate hexahydrate oil bath to generate ZIF-67@Co, and then ZIF-67 67 or ZIF-67@Co is calcined to generate cobalt tetroxide and then phosphating or directly phosphating it to obtain a MOF-derived CoP hydrogen evolution catalyst. The obtained MOF-derived CoP hydrogen evolution catalyst has high catalytic activity for hydrogen evolution, good conductivity, and acidity. The advantage of high stability under certain conditions. Background technique [0002] In recent years, due to energy shortage and environmental pollution, hydrogen energy has been considered as the most promising green fuel due to its advantages of greenness, environmental protection, and wide sources. Hydrogen production by electrolysis of water is currently the most environmentally frie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/04C25B1/04
CPCC25B11/04C25B1/04Y02E60/36
Inventor 郭志岩王栋李俊华李明杜芳林
Owner QINGDAO UNIV OF SCI & TECH
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