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Ruthenium nanocluster hydrogen evolution electrocatalyst and super-assembly method thereof

A technology of nano-clusters and electrocatalysts, applied in the field of porous materials, can solve the problems of unguaranteed sustainable hydrogen supply, scarce reserves, high material costs, etc., and achieve the effects of superior performance, simple preparation method and excellent stability

Active Publication Date: 2022-04-12
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Platinum-based compounds are still the state-of-the-art HER electrocatalysts, but sustainable hydrogen supply cannot be guaranteed due to their high material cost and scarce reserves

Method used

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  • Ruthenium nanocluster hydrogen evolution electrocatalyst and super-assembly method thereof
  • Ruthenium nanocluster hydrogen evolution electrocatalyst and super-assembly method thereof
  • Ruthenium nanocluster hydrogen evolution electrocatalyst and super-assembly method thereof

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preparation example Construction

[0026] The super-assembly preparation method of the ruthenium nano-cluster hydrogen evolution electrocatalyst of the present invention specifically comprises the following steps:

[0027] Step 1, placing the zinc zeolite imidazole framework in a tube furnace and performing high-temperature carbonization in a hydrogen-argon mixed gas to obtain a nitrogen-doped carbon nanoframe;

[0028] Step 2, soak the nitrogen-doped carbon nanoframe in the phytic acid solution, transfer it to an evaporation container (evaporating dish) after ultrasonic stirring, and evaporate to induce self-assembly to obtain a phytic acid-modified nitrogen-doped carbon nanoframe;

[0029] In step 3, the phytic acid-modified nitrogen-doped carbon nanoframe is soaked in a hydrated ruthenium trichloride solution, and ultrasonically stirred to obtain a ruthenium nanocluster hydrogen evolution electrocatalyst.

[0030] Step 1 is to synthesize the metal-organic framework material zinc zeolite imidazole framework, ...

Embodiment 1

[0040] A super-assembly preparation method of a ruthenium nanocluster hydrogen evolution electrocatalyst of the present embodiment comprises the following steps:

[0041] In step 1, the zinc zeolite imidazole framework is placed in a tube furnace and subjected to high-temperature carbonization in a hydrogen-argon mixed gas to obtain a nitrogen-doped carbon nanoframe.

[0042] Step 1 includes the following sub-steps:

[0043] Step 1-1, ultrasonically dissolving dimethylimidazole in methanol to obtain imidazole methanol solution;

[0044] Step 1-2, ultrasonically dissolving zinc nitrate hexahydrate in methanol to obtain a zinc methanol solution;

[0045] In step 1-3, the imidazole methanol solution is quickly poured into the zinc methanol solution to obtain a mixed solution;

[0046] In steps 1-4, the mixed solution was stirred at room temperature for 24 hours, and then centrifuged and vacuum-dried to obtain the zinc zeolite imidazole framework.

[0047] The molar ratio of zi...

Embodiment 2

[0069] A super-assembly preparation method of a ruthenium nanocluster hydrogen evolution electrocatalyst of the present embodiment comprises the following steps:

[0070] In step 1, the zinc zeolite imidazole framework is placed in a tube furnace and subjected to high-temperature carbonization in a hydrogen-argon mixed gas to obtain a nitrogen-doped carbon nanoframe.

[0071] Step 1 includes the following sub-steps:

[0072] Step 1-1, ultrasonically dissolving dimethylimidazole in methanol to obtain imidazole methanol solution;

[0073] Step 1-2, ultrasonically dissolving zinc nitrate hexahydrate in methanol to obtain a zinc methanol solution;

[0074] In step 1-3, the imidazole methanol solution is quickly poured into the zinc methanol solution to obtain a mixed solution;

[0075] In steps 1-4, the mixed solution was stirred at room temperature for 24 hours, and then centrifuged and vacuum-dried to obtain the zinc zeolite imidazole framework.

[0076] The molar ratio of zi...

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Abstract

The invention belongs to the technical field of porous materials, and provides a ruthenium nanocluster hydrogen evolution electrocatalyst and a super-assembly method thereof.The ruthenium nanocluster hydrogen evolution electrocatalyst is prepared by carbonizing a zinc zeolite imidazole framework at a high temperature to obtain a nitrogen-doped carbon nano framework, then mixing the framework with a phytic acid solution to obtain a phytic acid modified nitrogen-doped carbon nano framework, and then conducting hydrogen evolution on the nitrogen-doped carbon nano framework to obtain the ruthenium nanocluster hydrogen evolution electrocatalyst. The preparation method comprises the following steps: preparing a phytic acid molecular structure, modifying the phytic acid molecular structure with a modified nano-frame, mixing the modified nano-frame serving as a carrier with a ruthenium trichloride hydrate solution, chelating metal ions in the solution through a phosphate group in the phytic acid molecular structure modified on the surface of the nano-frame in the reaction process to form a ruthenium nano-cluster, and finally obtaining the corresponding ruthenium nano-cluster hydrogen evolution electrocatalyst. And the prepared ruthenium nanocluster hydrogen evolution electrocatalyst is excellent in performance, high in activity and excellent in stability, meanwhile, the price of ruthenium is far lower than that of platinum, and extremely high economic benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of porous materials, and in particular relates to a ruthenium nano-cluster hydrogen evolution electrocatalyst and a super-assembly method thereof. Background technique [0002] Global energy consumption has been growing exponentially over the past few decades and is expected to increase by 56% by 2040. Currently, 80% of the world's consuming energy comes from fossil fuels, leading to a severe energy crisis and severe global warming. These problems motivate scientists to develop environmentally friendly energy sources for our daily life, and hydrogen is considered as a real fossil fuel substitute in the future because of its highest mass-to-energy density and zero carbon dioxide emissions. Electrochemical water splitting has the advantages of simple process, high product purity, and good reproducibility, making it an attractive method for hydrogen production. However, the hydrogen evolution reaction (HER) r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/095
CPCY02E60/36
Inventor 孔彪梁启锐曾洁谢磊
Owner FUDAN UNIV