Co@N-C nanosheet with ultrathin hierarchical structure as well as preparation method and application thereof

A hierarchical structure and nanosheet technology, applied in the direction of electrodes, electrolytic processes, electrolytic components, etc., can solve the problems that hinder wide application, low selectivity, and scarce reserves, and achieve simple preparation methods, increase active sites, and increase surface area. Active area effect

Inactive Publication Date: 2021-07-02
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still some urgent problems to be solved on the road of electrolysis of water to produce hydrogen. Among them, the oxygen evolution reaction requires high overpotential due to its complex mechanism, slow kinetics, and high-efficiency electrocatalysts to overcome o

Method used

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  • Co@N-C nanosheet with ultrathin hierarchical structure as well as preparation method and application thereof
  • Co@N-C nanosheet with ultrathin hierarchical structure as well as preparation method and application thereof
  • Co@N-C nanosheet with ultrathin hierarchical structure as well as preparation method and application thereof

Examples

Experimental program
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Example Embodiment

[0038] Example 1

[0039] Preparation method of ultra-thin hierarchical CO @ N-C n-c, including the following steps:

[0040] 1) Precarriver and alkali metal inorganic salt saturated solution: Take 10 ml of saturated NaCl solution, add 5 ml of 0.05 mol L -1 Co (NO) 3 ) 2 Precursor solution and 10 ml 0.05 mol L -1 The L-histidine solution, the oscillating mix is ​​uniform, dispersed into the surface of the surface of the surface.

[0041] 2) Preparation of ultra-thin hierarchical CO @ N-C nanofold: The recrystallization product obtained by step 1) is surrounded by a nitrogen atmosphere, at 5 ° C · min. -1 The program was warmed to 700 ° C for heat treatment, and held at this temperature for 2 h, cooled to room temperature, and the final product can be obtained from centrifugation.

Example Embodiment

[0042] Example 2

[0043] Preparation method of ultra-thin hierarchical CO @ N-C n-c, including the following steps:

[0044] 1) Precursor and alkali metal inorganic salt saturated solution Recrystallization: Take 10ml saturated NA 2 SO 4 Solution, add 5 ml of 0.05 mol L -1 Co (NO) 3 ) 2 Precursor solution and 10 ml 0.05 mol L -1 The L-histidine solution, the oscillating mix is ​​uniform, dispersed into the surface of the surface of the surface.

[0045] 2) Preparation of ultra-thin hierarchical CO @ N-C nanofold: The recrystallization product obtained by step 1) is surrounded by a nitrogen atmosphere, at 5 ° C · min. -1 The program was warmed to 700 ° C for heat treatment, and held at this temperature for 2 h, cooled to room temperature, and the final product can be obtained from centrifugation.

Example Embodiment

[0046] Example 3

[0047] Preparation method of ultra-thin hierarchical CO @ N-C n-c, including the following steps:

[0048] 1) Precursor and alkali metal inorganic salt saturated solution recrystallization: Take 10ml saturated MGCL 2 Solution, add 5 ml of 0.05 mol L -1 Co (NO) 3 ) 2 Precursor solution and 10 ml 0.05 mol L -1 The L-histidine solution, the oscillating mix is ​​uniform, dispersed into the surface of the surface of the surface.

[0049] 2) Preparation of ultra-thin hierarchical CO @ N-C nanofold: The recrystallization product obtained by step 1) is surrounded by a nitrogen atmosphere, at 5 ° C · min. -1 The program was warmed to 700 ° C for heat treatment, and held at this temperature for 2 h, cooled to room temperature, and the final product can be obtained from centrifugation.

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Abstract

The invention discloses Co@N-C nanosheet with ultrathin hierarchical structure as well as a preparation method and application thereof. The preparation method comprises the following steps: by taking alkali metal inorganic salt as a hard template, inorganic cobalt salt as a precursor and alkaline amino acid as a carbon source and a nitrogen source, uniformly mixing a saturated solution of the alkali metal inorganic salt, a cobalt precursor solution and the carbon source and the nitrogen source, and recrystallizing at room temperature, carrying out high-temperature reduction on the recrystallized product by utilizing a high-temperature reduction method to obtain the Co@N-C nanosheet with the ultrathin hierarchical structure. The ultra-thin hierarchical structure Co@N-C nanosheet has the advantages of large specific surface area, full load, high electrocatalytic activity and the like, and shows relatively high catalytic activity and stability as an oxygen evolution anode catalyst. The preparation method disclosed by the invention is simple, environment-friendly and universal.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to an electrolytic water catalyst and its preparation method and application. Background technique [0002] At present, the development of new technologies and new energy sources is a research hotspot. A series of new energy sources such as solar energy, wind energy, and biomass energy have emerged as the times require. Among them, hydrogen energy, as a renewable energy source with abundant reserves, clean and pollution-free, is considered to be the most A promising new energy carrier. Among many hydrogen production methods, hydrogen production by electrolysis of water stands out because of its advantages of high efficiency, greenness, environmental protection, and abundant raw materials. The electric energy required for electrolysis can be supplied by solar energy, wind energy, etc.; therefore, hydrogen production by electrolysis of water is also an important energy source means of conver...

Claims

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Application Information

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IPC IPC(8): C25B11/091C25B1/04
CPCC25B1/04Y02E60/36
Inventor 唐亚文王悦李梦周其兴王琴张兴媛孙冬梅
Owner NANJING NORMAL UNIVERSITY
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