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Molybdenum sulfide@cobalt-mof/nf hydrogen evolution material and in situ synthesis method and application

A technology of in-situ synthesis and hydrogen evolution reaction, applied in the direction of electrolysis components, electrodes, electrolysis process, etc., can solve the problems that hinder large-scale application, high cost and scarcity, and achieve improved hydrogen evolution performance and stability, low raw material cost, The effect of the fast rate of hydrogen

Active Publication Date: 2022-07-19
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although Pt and Ru / Ir-based composites are considered as state-of-the-art electrocatalysts for HER and OER, their high cost and scarcity severely hinder large-scale applications.

Method used

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  • Molybdenum sulfide@cobalt-mof/nf hydrogen evolution material and in situ synthesis method and application
  • Molybdenum sulfide@cobalt-mof/nf hydrogen evolution material and in situ synthesis method and application
  • Molybdenum sulfide@cobalt-mof/nf hydrogen evolution material and in situ synthesis method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]

[0033] The above-mentioned hydrogen evolution material is prepared by the preparation method of the following steps:

[0034] Dissolve 1 mmol of 2-methylimidazole and 1 mmol of cobalt nitrate hexahydrate in 30 mL and 50 mL of deionized water, respectively, and stir them in a magnetic stirrer for 30 min after mixing until there are no solid particles in the solution and the color is purple. The 1mm×4mm×1mm nickel foam was soaked at room temperature for 10h, and the soaked Co-MOF / NF was washed twice with absolute ethanol and deionized water, respectively, and vacuumized at 60 °C overnight to dry; 0.07mmol of tetrahydrate molybdic acid was Ammonium and 2mmol of sodium sulfide nonahydrate were dissolved in 50mL of deionized water, and 0.1mL of nitric acid was added dropwise to adjust the pH, and the solution changed from yellow to reddish-brown; the dried Co-MOF / NF was used as the working electrode, and the constant temperature was carried out on the chi760e electrochem...

Embodiment 2

[0040]

[0041] The above-mentioned hydrogen evolution material is prepared by the preparation method of the following steps:

[0042] Dissolve 1 mmol of 2-methylimidazole and 1 mmol of cobalt nitrate hexahydrate in 30 mL and 50 mL of deionized water, respectively, and stir them in a magnetic stirrer for 30 min after mixing until there are no solid particles in the solution and the color is purple. The 1mm×4mm×1mm nickel foam was soaked at room temperature for 10h, and the soaked Co-MOF / NF was washed twice with absolute ethanol and deionized water, respectively, and vacuumized at 60 °C overnight to dry; 0.07mmol of tetrahydrate molybdic acid was Ammonium and 2mmol of sodium sulfide nonahydrate were dissolved in 50mL of deionized water, and 0.1mL of nitric acid was added dropwise to adjust the pH, and the solution changed from yellow to reddish-brown; the dried Co-MOF / NF was used as the working electrode, and the constant temperature was carried out on the chi760e electrochem...

Embodiment 3

[0048]

[0049] The above-mentioned hydrogen evolution material is prepared by the preparation method of the following steps:

[0050] Dissolve 1 mmol of 2-methylimidazole and 1 mmol of cobalt nitrate hexahydrate in 30 mL and 50 mL of deionized water, respectively, and stir them in a magnetic stirrer for 30 min after mixing until there are no solid particles in the solution and the color is purple. The 1mm×4mm×1mm nickel foam was soaked at room temperature for 10h, and the soaked Co-MOF / NF was washed twice with absolute ethanol and deionized water, respectively, and vacuumized at 60 °C overnight to dry; 0.07mmol of tetrahydrate molybdic acid was Ammonium and 2mmol of sodium sulfide nonahydrate were dissolved in 50mL of deionized water, and 0.1mL of nitric acid was added dropwise to adjust the pH, and the solution changed from yellow to reddish-brown; the dried Co-MOF / NF was used as the working electrode, and the constant temperature was carried out on the chi760e electrochem...

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Abstract

The invention relates to a molybdenum sulfide@cobalt-MOF / NF hydrogen evolution material and an in-situ synthesis method and application, comprising: preparing a mixed aqueous solution A of 2-methylimidazole and cobalt nitrate hexahydrate; placing a foam liquid in S1 to prepare a In the mixed aqueous solution A, stand and soak to obtain Co-MOF / NF; mix ammonium molybdate hydrate, sodium sulfide nonahydrate and deionized water to obtain mixed solution B; move Co-MOF / NF into the above mixed solution B, and pass MoS was obtained after potentiostatic electrodeposition reaction 2 @Co‑MOF / NF. Compared with the prior art, the present invention increases the specific surface area of ​​the material by self-supporting the flaky Co-MOF on the NF, improves the contact area between the material and the water, makes the preparation of hydrogen easier, and improves the material's properties. The nanostructure improves the hydrogen evolution performance and stability of the material.

Description

technical field [0001] The invention relates to the technical field of hydrogen energy, in particular to a molybdenum sulfide@cobalt-MOF / NF hydrogen evolution material and an in-situ synthesis method and application. Background technique [0002] With the depletion of fossil fuels, various new energy sources are continuously developed and utilized. As a renewable secondary energy source, hydrogen energy has a wide range of sources, high calorific value, cleanness and good combustion stability. It is a new generation of widely used energy carriers after non-renewable energy sources such as fossil fuels. [0003] Electrocatalytic water splitting consists of an oxygen evolution reaction (OER) and a hydrogen evolution reaction (HER). 2 ) effective techniques. A great deal of work has been devoted to elucidating the cost-effective HER performance of electrolysis in acidic electrolytes, focusing on the preparation of high-performance electrocatalysts to reduce dynamic overpotent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/095C25B11/061C25B11/052C25B11/031C25B1/04
CPCC25B1/04Y02E60/36
Inventor 蒋继波孙冉黄星丛海山王云云唐佳斌陈宇凯韩生
Owner SHANGHAI INST OF TECH
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