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Optimized electron configuration co for efficient oxygen evolution reaction 4 Preparation method of n nanosheets

A technology of electronic configuration and oxygen evolution reaction, applied in chemical instruments and methods, nanotechnology, electrodes, etc., can solve the problems of high cost, limited large-scale application, low reserves, etc., and achieve high catalytic activity, large use potential, high stability effect

Active Publication Date: 2022-01-28
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

RuO 2 and IrO 2 are two highly active OER electrocatalysts, but their high cost and low reserves limit large-scale applications

Method used

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  • Optimized electron configuration co for efficient oxygen evolution reaction <sub>4</sub> Preparation method of n nanosheets
  • Optimized electron configuration co for efficient oxygen evolution reaction <sub>4</sub> Preparation method of n nanosheets
  • Optimized electron configuration co for efficient oxygen evolution reaction <sub>4</sub> Preparation method of n nanosheets

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Experimental program
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Effect test

Embodiment 1

[0033] An optimized electron configuration Co for efficient oxygen evolution reaction 4 The preparation method of N nanometer sheet, comprises the following steps:

[0034] Step 1. Synthesis of Co(CO3 ) 0.5 (OH) . 0.11H 2 O nanosheet precursor: in a mixed solvent of 60 milliliters of ethylene glycol and 11 milliliters of deionized water, add 600 milligrams of cobalt acetylacetonate and 2.2 grams of hexadecyltrimethylammonium bromide, stir for 20 min to obtain a mixed solution, and The mixed solution was transferred to a 100 ml autoclave, sealed, heated at 180°C for 48 hours, cooled to room temperature naturally, then the resulting precipitate was centrifuged, collected, washed three times with water and absolute ethanol, and dried in vacuum at 60°C for 24 hours. Get Co(CO 3 ) 0.5 (OH) . 0.11H 2 O nanosheet precursor;

[0035] Step 2. Synthesis of Co 3 o 4 Nanosheet precursor: Co(CO 3 ) 0.5 (OH) . 0.11H 2 O nanosheet precursors were calcined at 320 °C for 5 min in...

Embodiment 2

[0039] An optimized electron configuration Co for efficient oxygen evolution reaction 4 The preparation method of N nanometer sheet, comprises the following steps:

[0040] Step 1. Synthesis of Co(CO 3 ) 0.5 (OH) . 0.11H 2 O nanosheet precursor: in a mixed solvent of 60 milliliters of ethylene glycol and 11 milliliters of deionized water, add 600 milligrams of cobalt acetylacetonate and 2.2 grams of hexadecyltrimethylammonium bromide, stir for 20 min to obtain a mixed solution, and The mixed solution was transferred to a 100 ml autoclave, sealed, heated at 180°C for 48 hours, cooled to room temperature naturally, then the resulting precipitate was centrifuged, collected, washed three times with water and absolute ethanol, and dried in vacuum at 60°C for 24 hours. Get Co(CO 3 ) 0.5 (OH) . 0.11H 2 O nanosheet precursor;

[0041] Step 2. Synthesis of Co 3 o 4 Nanosheet precursor: Co(CO 3 ) 0.5 (OH) . 0.11H 2 O nanosheet precursors were calcined at 320 °C for 5 min ...

Embodiment 3

[0045] An optimized electron configuration Co for efficient oxygen evolution reaction 4 The preparation method of N nanometer sheet, comprises the following steps:

[0046] Step 1. Synthesis of Co(CO 3 ) 0.5 (OH) . 0.11H 2 O nanosheet precursor: in a mixed solvent of 60 milliliters of ethylene glycol and 11 milliliters of deionized water, add 600 milligrams of cobalt acetylacetonate and 2.2 grams of hexadecyltrimethylammonium bromide, stir for 20 min to obtain a mixed solution, and The mixed solution was transferred to a 100 ml autoclave, sealed, heated at 180°C for 48 hours, cooled to room temperature naturally, then the resulting precipitate was centrifuged, collected, washed three times with water and absolute ethanol, and dried in vacuum at 60°C for 24 hours. Get Co(CO 3 ) 0.5 (OH) . 0.11H 2 O nanosheet precursor;

[0047] Step 2. Synthesis of Co 3 o 4 Nanosheet precursor: Co(CO 3 ) 0.5 (OH) . 0.11H 2 O nanosheet precursors were calcined at 320 °C for 5 min ...

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Abstract

The invention discloses an optimized electron configuration Co for efficient oxygen evolution reaction 4 The preparation method of N nanosheets, comprising: synthesizing Co(CO 3 ) 0.5 (OH)·0.11H 2 O nanosheet precursor; synthesis of Co 3 o 4 Nanosheet precursor: Co(CO 3 ) 0.5 (OH)·0.11H 2 O nanosheet precursors were calcined in air atmosphere and cooled to room temperature to obtain Co 3 o 4 Precursor; Synthesis of Co 4 N nanosheets: Calcination of Co in ammonia atmosphere 3 o 4 Precursor, to get Co 4 N nanosheets; regulation of Co 4 Electronic configuration of N nanosheets: by calcination of Co in an argon-hydrogen mixed atmosphere 4 N nanosheets to regulate Co 4 The nitrogen content of the N nanosheets can be adjusted to achieve the purpose of regulating the electronic configuration of Co. The present invention adopts Co 4 Partial reduction of N nanosheets yielded defect-type Co with different nitrogen contents 4 N nanosheets. Deficient Co with different nitrogen contents 4 N nanosheets have different electronic configurations, where the e of Co ions g The electronic filling number is also different, which has great potential for use in catalysis, energy storage and other fields.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to an optimized electron configuration Co for efficient oxygen evolution reaction 4 Preparation method of N nanosheets. Background technique [0002] As an important anodic reaction, the electrochemical oxidation reaction (OER) plays the role of a half-reaction in many energy conversion processes, such as water splitting, carbon dioxide reduction, and rechargeable metal-air batteries. Due to the involvement of multi-step proton-coupled electron transfer, the OER process suffers from slow kinetics, which drives the development of highly efficient catalysts. RuO 2 and IrO 2 are two highly active OER electrocatalysts, but their high cost and low storage limit their large-scale applications. Therefore, researchers look for transition metal compounds as noble metal-free alternatives, such as oxides, hydroxides, sulfides, selenides, phosphides, and nitrides. [0003] In recent year...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B21/06B82Y40/00C25B1/04C25B11/075
CPCC01B21/0622B82Y40/00C25B1/04C01P2004/24Y02P20/54Y02E60/36
Inventor 何嵘刘欢欢雷佳竹文坤董云周莉温逢春陈佳丽李烨
Owner SOUTHWEAT UNIV OF SCI & TECH
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