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

Synthesis method of a hierarchical nanostructure iron-doped nickel oxide anode electrolysis oxygen evolution catalyst

A nanostructure, anode electrolysis technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, electrolytic components, etc. Short and other problems, to achieve the effect of improving the electrochemical active surface area, ensuring the performance of the catalyst, and ensuring the reliability

Active Publication Date: 2022-05-10
南京清飏科技有限公司
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Existing methods are used to synthesize new high-activity anode oxygen evolution catalysts, but the synthesis methods are cumbersome and complicated, the raw materials used are expensive and costly, and the catalysts obtained have poor structural stability, short service life, and are not easy for large-scale industrial production

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Synthesis method of a hierarchical nanostructure iron-doped nickel oxide anode electrolysis oxygen evolution catalyst
  • Synthesis method of a hierarchical nanostructure iron-doped nickel oxide anode electrolysis oxygen evolution catalyst
  • Synthesis method of a hierarchical nanostructure iron-doped nickel oxide anode electrolysis oxygen evolution catalyst

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] The invention provides a method for synthesizing an oxygen evolution catalyst for electrolysis of water with a hierarchical nanostructured iron-doped nickel oxide anode, comprising the following steps: Step 1: ferric nitrate (Fe 2 (NO 3 ) 3 ∙9H 2 O), nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O) and urea (NH 2 CONH 2 ) fully dissolved in water to obtain a solution, the molar ratio of the iron-nickel precursor in the solution is 1: 1-3, and then transferred to a stainless steel autoclave reactor lined with polytetrafluoroethylene with 2.5-3.5 times the volume of the solution .

[0028] The iron-doped nickel oxide catalytic electrode with hierarchical nanostructure includes three types, which are hierarchical structure spherical ultra-fine nanowire clusters, which are recorded as NiFe-I catalysts, hierarchical structure flower-like nanosheets, which are recorded as NiFe-II catalysts, and hierarchical structure island-shaped Ultrathin nanosheet clusters, denoted as NiFe-III...

Embodiment 1

[0034] A method for synthesizing an oxygen evolution catalyst for electrolysis of water with a hierarchical nanostructure iron-doped nickel oxide anode, comprising the following steps: mixing 0.152 to 1.212 grams of ferric nitrate, 0.109 to 2.617 grams of nickel nitrate and 0.40 grams of urea (NH 2 CONH 2 ) fully dissolved in 20 ml of water, ferric nitrate concentration: 0.0187 ~ 0.150 mol / liter, nickel nitrate concentration: 0.0187 ~ 0.300 mol / liter, and keep the molar ratio of iron salt and nickel salt at 1 : 1 or 1 : 2, then Add it into a 50 ml stainless steel autoclave reactor lined with polytetrafluoroethylene, add 20 ml of diethylene glycol into the stainless steel autoclave reactor for thorough mixing, put 4~6 tablets through concentrated nitric acid, and the concentrated Carbon paper (1 × 2.5 cm 2 ) immersed in the reactant solution of the autoclave reactor, sealed and heated to any temperature in the range of 120 ~ 150 ºC, reacted for 20 hours and then cooled to room...

Embodiment 2

[0036] A method for synthesizing an oxygen evolution catalyst for electrolytic water evolution with hierarchical nanostructured iron-doped nickel oxide anodes, comprising the following steps: dissolving 0.152 to 1.212 grams of ferric nitrate, 0.3272 to 2.617 grams of nickel nitrate and 0.600 grams of urea in 15 milliliters of water, the concentration of ferric nitrate: 0.025 ~ 0.200 mol / liter, nickel nitrate concentration: 0.075 ~ 0.600 mol / liter, and the mol ratio that keeps iron salt and nickel salt is 1: 3, after adding 35 milliliters of ethanols in the stainless steel autoclave reactor and carrying out thorough mixing, will 4~6 pieces of carbon paper (1 × 2.5 cm 2 ) immersed in the reactant solution of the autoclave reactor, sealed and heated to any temperature in the range of 120 ~ 150 ºC, reacted for 20 hours, then cooled to room temperature, took out the carbon paper covered with the nickel-iron basic carbonate precursor, and put it in the Wash in warm water at 40 ~ 45 ...

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
sizeaaaaaaaaaa
diameteraaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for synthesizing an oxygen evolution catalyst for electrolyzing water with a hierarchical nanostructure iron-doped nickel oxide anode. Under the situation that the molar ratio of iron-nickel precursor is 1:1-2, obtain NiFe-I catalyst. In the case that the molar ratio of the iron-nickel precursor is 1:2-3, a NiFe-II catalyst is obtained. The NiFe‑II catalyst was treated with cyclic voltammetry in an aminoborane solution to obtain hierarchical island-shaped iron-doped nickel oxide ultrathin nanosheets, which were designated as NiFe‑III catalysts. Three different types of iron-doped nickel oxide catalysts synthesized by adjusting the hierarchical structure and morphology can effectively meet the different requirements for the oxygen evolution rate of electrolyzed water. Compared with the prior art, the method provided by the present invention increases the electrochemically active surface area, saves the amount of catalyst, forms a highly porous structure, promotes the mass transfer of water molecules to the electrode surface, significantly improves catalyst activity, and reduces The oxygen reaction overpotential simplifies the preparation process of the catalytic electrode, and the method provided by the invention is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a preparation method of a nanostructure metal oxide electrolysis oxygen evolution catalyst, in particular to a synthesis method of a nanostructure iron-doped nickel oxide anode electrolysis water oxygen evolution catalyst. Background technique [0002] With the decline of fossil fuel reserves and the deepening of the concept of sustainable development, the hydrogen energy market will form a hydrogen supply pattern dominated by renewable energy in the near future (around 2050). Become the most effective hydrogen supply subject, so that it has attracted much attention in the production of hydrogen energy. The efficiency of hydrogen production from water electrolysis largely depends on the activity of catalysts at the anode and cathode, especially the activity of the anodic oxygen evolution half-reaction whose kinetics is slow and involves four electron transfers. Therefore, the development of an oxygen evolution catalyst synthes...

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 Patents(China)
IPC IPC(8): B01J23/755B01J35/02B01J35/10C25B1/04C25B11/091B01J35/00
CPCB01J23/755C25B1/04C25B11/091B01J35/00B01J35/30B01J35/33B01J35/60B01J35/615Y02E60/36
Inventor 谭轶巍王国静黄彦
Owner 南京清飏科技有限公司