Defect-rich molybdenum-doped cobalt selenide/nanocarbon electrocatalyst as well as preparation method and application of defect-rich molybdenum-doped cobalt selenide/nanocarbon electrocatalyst

An electrocatalyst, cobalt selenide technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., to achieve the effect of optimizing electronic structure, increasing electrocatalytic activity, and good stability

Active Publication Date: 2021-03-12
QUZHOU RES INST OF ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, pure cobalt selenide is used as an electrocatalyst, and its performance is still far from that of commercial noble metal catalysts such as Pt / C.

Method used

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  • Defect-rich molybdenum-doped cobalt selenide/nanocarbon electrocatalyst as well as preparation method and application of defect-rich molybdenum-doped cobalt selenide/nanocarbon electrocatalyst
  • Defect-rich molybdenum-doped cobalt selenide/nanocarbon electrocatalyst as well as preparation method and application of defect-rich molybdenum-doped cobalt selenide/nanocarbon electrocatalyst
  • Defect-rich molybdenum-doped cobalt selenide/nanocarbon electrocatalyst as well as preparation method and application of defect-rich molybdenum-doped cobalt selenide/nanocarbon electrocatalyst

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Experimental program
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Embodiment 1

[0042] (1) Weigh 0.6g cobalt nitrate hexahydrate solid particles and 0.11g sodium molybdate solid particles, dissolve them in 40mL deionized aqueous solution, ultrasonicate for 20min, and set aside; weigh 1.3g 2-methylimidazole powder, dissolve them in 40mL deionized water In the ionic water solution, stir evenly;

[0043] (2) Pour the mixed solution of cobalt nitrate and sodium molybdate into the prepared 2-methylimidazole solution, stir for 4 hours; wash by centrifugation, and dry at 60°C for 20 hours to obtain the precursor of molybdenum-doped cobalt-based metal organic framework body;

[0044] (3) Weigh the prepared molybdenum-doped cobalt-based organometallic framework precursor and selenium powder, mix them uniformly according to the mass ratio of 1:2, place them in a tube furnace for high-temperature calcination, and heat at 900°C for 2 hours; after the reaction is completed, cool To room temperature, obtain molybdenum-doped cobalt selenide / nano-carbon catalyst;

[00...

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Abstract

The invention relates to the technical field of electrocatalysts, and discloses a defect-rich molybdenum-doped cobalt selenide / nanocarbon electrocatalyst, and a preparation method and an application thereof. The preparation method comprises the following steps: (1) dissolving a cobalt salt and a molybdate, adding a 2-methylimidazole solution, conducting stirring and mixing, and conducting centrifugal drying to obtain a molybdenum-doped cobalt-based metal organic framework precursor; (2) mixing the precursor with selenium powder, conducting grinding, and conducting calcining to obtain a molybdenum-doped cobalt selenide / nanocarbon electrocatalyst; and (3) carrying out heat treatment on the catalyst prepared in the step (2) to obtain the defect-rich molybdenum-doped cobalt selenide / nanocarbonelectrocatalyst. The obtained catalyst has excellent electro-catalytic activity on a water electrolysis cathode hydrogen evolution reaction under an alkaline condition, and still has relatively goodstability under long-term work.

Description

technical field [0001] The invention relates to the technical field of electrocatalysts, in particular to a defect-rich molybdenum-doped cobalt selenide / nano-carbon electrocatalyst and its preparation method and application. Background technique [0002] As a green renewable energy, hydrogen energy is clean and efficient compared to other traditional fossil fuels, such as coal. At present, among various hydrogen evolution methods, electrochemical water splitting hydrogen production is one of the most promising methods and has been extensively and deeply studied. However, among the effective electrocatalysts currently used for the hydrogen evolution reaction, the best electrocatalysts are generally noble metal-based catalysts (such as Pt-based catalysts), but the scarcity and high price of noble metals limit their widespread development; non-noble metal-based materials are used instead of noble metals Catalysts for efficient electrolysis of water to produce hydrogen have far...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/054C25B11/052C25B11/091C25B1/04
CPCC25B1/04Y02E60/36
Inventor 侯阳王淋杨彬雷乐成
Owner QUZHOU RES INST OF ZHEJIANG UNIV
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