Ruthenium and nitrogen co-doped porous carbon catalyst, preparation method thereof and application of ruthenium and nitrogen co-doped porous carbon catalyst in hydrogen evolution by electrolysis

A co-doping and catalyst technology, applied in the field of electrochemistry, can solve problems such as shedding and aggregation, and achieve the effect of improving stability, good repeatability and large porosity

Active Publication Date: 2021-07-20
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, directly loaded metals often fall off or accumulate during the catalytic reaction.

Method used

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  • Ruthenium and nitrogen co-doped porous carbon catalyst, preparation method thereof and application of ruthenium and nitrogen co-doped porous carbon catalyst in hydrogen evolution by electrolysis
  • Ruthenium and nitrogen co-doped porous carbon catalyst, preparation method thereof and application of ruthenium and nitrogen co-doped porous carbon catalyst in hydrogen evolution by electrolysis
  • Ruthenium and nitrogen co-doped porous carbon catalyst, preparation method thereof and application of ruthenium and nitrogen co-doped porous carbon catalyst in hydrogen evolution by electrolysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) In 10 mL of water, add 20.7 mg (1 mmol) of ruthenium trichloride and 452 mg (10 mmol) of tetrasodium ethylenediaminetetraacetic acid tetrahydrate respectively, ultrasonically dissolve at room temperature, and then stir for 0.5 h. The solvent of the reaction solution was completely evaporated by a rotary evaporator, and finally the remaining solid was vacuum-dried in a vacuum oven at 60° C. for 12 hours to obtain a ruthenium complex precursor.

[0031] (2) Under the protection of the inert gas argon, the precursor obtained in step (1) was placed in a tube furnace and heated to 850° at a rate of 5°C / min, pyrolyzed at a constant temperature for 2h, and then naturally cooled to room temperature.

[0032] (3) After the black granular product obtained in step (2) is ground to powder, it is dispersed in 0.5M H 2 SO 4 Stir at room temperature for 12 hours, then wash with deionized water and dry in vacuum to prepare a ruthenium-nitrogen co-doped porous carbon catalyst.

[...

Embodiment 2

[0042] In this example, the ruthenium-doped porous carbon electrocatalyst was prepared according to the same method as in Example 1, except that the amount of tetrasodium ethylenediaminetetraacetic acid tetrahydrate as a raw material in step (1) was changed to 226 mg (5 mmol).

[0043]Electrochemical tests were carried out on the electrocatalyst obtained in this example in the same manner as in Example 1.

[0044] Such as Figure 6 Shown, at room temperature, the catalyst of this embodiment reaches 10mAcm in 1M KOH -2 The current density requires an overpotential of 75mV.

Embodiment 3

[0046] In this example, the ruthenium-doped porous carbon electrocatalyst was prepared according to the same method as in Example 1, except that the amount of tetrasodium ethylenediaminetetraacetic acid tetrahydrate as a raw material in step (1) was changed to 678 mg (15 mmol).

[0047] Electrochemical tests were carried out on the electrocatalyst obtained in this example in the same manner as in Example 1.

[0048] Such as Figure 7 Shown, at room temperature, the catalyst of this embodiment reaches 10mAcm in 1M KOH -2 The current density requires an overpotential of 95mV.

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Abstract

The invention discloses a ruthenium and nitrogen co-doped porous carbon catalyst as well as a preparation method and application thereof in hydrogen evolution by electrolysis. The catalyst is prepared by taking ethylenediamine tetraacetic acid salt as a ligand and a carbon source, preparing a ruthenium complex precursor by combining with ruthenium salt, and then performing high-temperature pyrolysis on the ruthenium complex precursor to obtain a target product. The catalyst provided by the invention has efficient hydrogen evolution activity and lasting stability, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and relates to a preparation method of an electrocatalyst applied to an electrochemical hydrogen evolution reaction, in particular to a preparation method of a ruthenium and nitrogen co-doped porous carbon catalyst. Background technique [0002] Hydrogen is not only an important industrial raw material, but also a clean energy and a good energy carrier. It can meet the long-term and large-capacity requirements of electrochemical energy storage and heat storage, and effectively guarantee the safety and stability of a high-proportion renewable energy system in the future. run. The development prospect of hydrogen energy is broad, but the production of hydrogen mainly depends on non-renewable fossil energy, such as methane steam reforming and water gas conversion. The shortage of fossil energy and the environmental pollution caused by it force people to look for environmentally friendly renewable en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/091
CPCC25B1/04Y02E60/36Y02P20/133
Inventor 谢建晖李懿君刘慧婧潘运玲李兵
Owner HEFEI UNIV OF TECH
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