Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method and application of nanofiber catalyst based on 1D metal organic framework

A metal-organic framework and nanofiber technology, applied in the field of nanomaterials, metal-organic framework materials, and nanocatalysis, can solve the problems of poor electrocatalytic oxygen evolution activity, poor conductivity of cobalt oxide, and limited quantity, etc., and achieve regular shape , good stability and high preparation efficiency

Inactive Publication Date: 2018-02-13
UNIV OF JINAN
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many types of MOFs, the number of MOFs precursors for electrocatalysts that are easy to prepare and transform into controllable forms is limited. At present, the preparation of oxygen evolution catalysts using three-dimensional (3D) MOFs microcrystals or nanocrystals as precursors has been reported. To the best of our knowledge, the preparation of oxygen evolution catalysts based on 1D MOFs nanofibers has not been reported
[0006] The cobalt element is abundant in the earth, and its oxide is cheap. However, the bulk cobalt oxide has poor conductivity and its electrocatalytic oxygen evolution activity is also poor.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. A preparation method based on 1D metal-organic framework nanofiber catalyst

[0029]Co-dissolve copper nitrate and cobalt nitrate with a volume ratio of 4:5 and a total amount of 0.63 mmol in 15 mL of water to obtain a blue and clear copper nitrate-cobalt nitrate mixture; mix 0.40 mmol of L-aspartic acid with Dissolve 0.50 mmol of sodium hydroxide in 2.0 mL of water to obtain a clear aspartic acid base solution; add the aspartic acid base solution to the copper nitrate-cobalt nitrate mixture, and leave it at room temperature for 5 minutes to form a precipitate; after 1 hour, suction filter, Dry at 60°C to prepare Cu-MOF nanofibers loaded with Co(II) ions, namely CuCo-MOF nanofibers;

[0030] Place the CuCo-MOF nanofibers in a tube furnace, heat them in an air atmosphere at a heating rate of 3-5°C / min, heat to 250°C, keep them for 1.5 h, and then cool them down to room temperature at a cooling rate of 2°C / min , to prepare a carbon-based copper-cobalt oxide nanofiber ...

Embodiment 2

[0032] 1. A preparation method based on 1D metal-organic framework nanofiber catalyst

[0033] Co-dissolve copper nitrate and cobalt nitrate with a volume ratio of 1:9 and a total amount of 3.28 mmol in 18 mL of water to obtain a blue clear copper nitrate-cobalt nitrate mixture; mix 0.40 mmol of L-aspartic acid with Dissolve 0.58 mmol of sodium hydroxide in 4.0 mL of water to obtain a clear aspartic acid base solution; add the aspartic acid base solution to the copper nitrate-cobalt nitrate mixture, and leave it at room temperature for 5 minutes to form a precipitate; Dry at 60°C to prepare Cu-MOF nanofibers loaded with Co(II) ions, namely CuCo-MOF nanofibers;

[0034] The CuCo-MOF nanofibers were placed in a tube furnace in an air atmosphere at a heating rate of 3-5 °C / min, heated to 300 °C, kept for 2.5 h, and then cooled to room temperature at a cooling rate of 2 °C / min. A carbon-based copper-cobalt oxide nanofiber catalyst, that is, a 1D metal-organic framework-based nano...

Embodiment 3

[0036] 1. A preparation method based on 1D metal-organic framework nanofiber catalyst, the steps are as follows:

[0037] Co-dissolve copper nitrate and cobalt nitrate with a volume ratio of 3:7 and a total amount of 2.0 mmol in 17 mL of water to obtain a blue clear copper nitrate-cobalt nitrate mixture; mix 0.40 mmol of L-aspartic acid with Dissolve 0.55 mmol of sodium hydroxide in 3.0 mL of water to obtain a clear aspartic acid base solution; add the aspartic acid base solution to the copper nitrate-cobalt nitrate mixture, and leave it at room temperature for 5 minutes to form a precipitate; Dry at 60°C to prepare Cu-MOF nanofibers loaded with Co(II) ions, namely CuCo-MOF nanofibers;

[0038] The CuCo-MOF nanofibers were placed in a tube furnace. In an air atmosphere, the heating rate is 3-5 °C / min, heated to 270 °C, and kept for 2 h, and then cooled to room temperature at a cooling rate of 2 °C / min to prepare a carbon-based copper-cobalt oxide nanofiber catalyst, namely 1...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
lengthaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a nanofiber catalyst based on a 1D metal organic framework and application of water electrolysis oxygen evolution based on the catalyst and belongs to the technical fields of nano catalysis, nano materials and metal organic framework materials. The preparation method comprises the main steps that after an aspartic acid alkaline solution and a coppernitrate-cobalt nitrate solution are mixed jointly at the room temperature, crystals are generated, and suction filtration and drying are conducted to prepare Cu-MOF nanofiber-loaded Co(II) ions, namely CuCo-MOF nanofibers; and the CuCo-MOF nanofibers are heated at the air atmosphere to prepare a carbon-based copper cobalt oxide nanofiber catalyst, namely the nanofiber catalyst based on the 1D metal organic framework. According to catalyst preparation, used raw materials are low in cost, the preparation technology is simple, reaction energy consumption is low, and the industrial application prospects are achieved; and the catalyst is used for efficient catalysis of water electrolysis oxygen evolution and has good oxygen evolution electro-catalysis activity and electrochemical stability.

Description

technical field [0001] The invention relates to a preparation method of a 1D metal-organic framework nanofiber catalyst and an application of the catalyst to electrolyze water for oxygen evolution, and belongs to the technical fields of nano-catalysis, nano-materials and metal-organic framework materials. Background technique [0002] With the rapid development of social economy and the continuous growth of the world population, human consumption of fossil fuels, such as coal and oil, has brought unprecedented pressure and challenges to the existing energy reserves and the natural environment. In order to meet the requirements of the new energy consumption and the improvement of the living quality of the existing population, all countries in the world urgently need to find sustainable and clean energy carriers. Electrocatalytic direct water splitting to produce hydrogen is considered to be an efficient way to realize this process. The electrocatalytic water splitting reacti...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B1/04
CPCC25B1/04C25B11/091Y02E60/36
Inventor 匡轩刘昭轩赵璐董彦芳魏琴
Owner UNIV OF JINAN