High-performance iron-doped nickel- or cobalt-based amorphous oxyhydroxide catalyst prepared by room temperature method, and research thereof on high-efficiency hydrogen production by electrolyzing water

A catalyst and amorphous technology, applied in the field of preparing high-performance iron-doped nickel or cobalt-based amorphous oxyhydroxide catalysts at room temperature and its high-efficiency electrolysis of water to produce hydrogen, can solve the problem of cobalt-based materials with insufficient oxygen evolution activity Improvement and other issues

Pending Publication Date: 2021-05-18
HUNAN NORMAL UNIVERSITY
View PDF8 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, most of the oxygen evolution catalysts with excellent performance are based on nickel-

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
  • High-performance iron-doped nickel- or cobalt-based amorphous oxyhydroxide catalyst prepared by room temperature method, and research thereof on high-efficiency hydrogen production by electrolyzing water
  • High-performance iron-doped nickel- or cobalt-based amorphous oxyhydroxide catalyst prepared by room temperature method, and research thereof on high-efficiency hydrogen production by electrolyzing water
  • High-performance iron-doped nickel- or cobalt-based amorphous oxyhydroxide catalyst prepared by room temperature method, and research thereof on high-efficiency hydrogen production by electrolyzing water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 Preparation of amorphous FeOOH / M-OOH nanosheet array and electrochemical test of oxygen evolution performance in 1 M KOH environment.

[0025] Step 1: Prepare the precursor of amorphous (oxyhydroxide) oxide, the method is as follows, the ratio of substrate liquid is 0.755 gFeCl 3 ·6H 2 O was fully dissolved in 5 ml of ethanol, ultrasonicated at a certain temperature for a certain period of time, and then the foam substrate cut out in step 1 was soaked in the substrate solution for a period of time to obtain a catalyst with high oxygen evolution electrolysis performance.

[0026]Electrocatalytic oxygen evolution performance chemical testing device GAMRY Reference 3000 electrochemical workstation, a well-known American brand, adopts a standard three-electrode system for testing. Among them, the three-electrode system has amorphous FeOOH / CoOOH as the working electrode, the Hg / HgO electrode imported by Gamry manufacturer as the reference electrode, platinum wire ...

Embodiment 2

[0027] Example 2 Preparation of amorphous FeOOH / M-OOH nanosheet arrays at different concentrations of corrosive agents and application of electrochemical tests for oxygen evolution performance in 1 M KOH electrolyte environment.

[0028] Step 1: Prepare the precursor of amorphous (oxyhydroxide) oxide. The method is as follows, and the ratio of different concentrations of substrate liquid: 0.755 g, 0.5 g, 0.25 g FeCl 3 ·6H 2 O is fully dissolved in 5 ml ethanol, and ultrasonically mixed for a period of time under heating conditions to obtain a corrosion substrate, and then the foam substrate cut in step 1 is soaked in the corrosion substrate solution for a period of time to obtain a high oxygen evolution Catalyst with electrolytic water performance.

[0029] Electrocatalytic oxygen evolution performance chemical testing device GAMRY Reference 3000 electrochemical workstation, a well-known American brand, adopts a standard three-electrode system for testing. The three-electrod...

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

No PUM Login to view more

Abstract

The invention discloses a high-performance iron-doped nickel- or cobalt-based amorphous oxyhydroxide catalyst prepared by a room temperature method, and a research thereof on high-efficiency hydrogen production by electrolyzing water, and belongs to the technical field of hydrogen production by electro-catalytic materials. According to the technical scheme, FeCl3. 6H2O and ethyl alcohol are mixed to form a precursor solution to conduct surface slow corrosion on conductive substrates such as foamed nickel and cobalt produced in a macro-scale mode, and a nickel-iron or cobalt-iron oxide catalyst grows on the surfaces of the conductive substrates in situ. A chemical reduction reaction is creatively introduced, and the excellent oxygen evolution catalyst is obtained on a commercial metal conductive substrate by utilizing chemical corrosion at room temperature. According to the unique material synthesis path, the non-noble metal cobalt or nickel-based oxygen evolution catalyst shows excellent oxygen evolution activity in an alkaline environment after in-situ iron doping, the overpotential is reduced to about 280 millivolts at the large current degree of 500 mA/cm<2>, the operation is stable in the large-current environment of 1.5 A/cm<2> or above, and the catalyst is suitable for industrial large-scale application and has wide application prospects. And the hydrogen fuel automobile and hydrogen energy industry in China is assisted.

Description

technical field [0001] The present invention relates to the research field of electrocatalytic materials used in the electrolysis of water to produce hydrogen, in particular to a FeOOH / M-OOH nanosheet array oxygen evolution based on in-situ growth on the surface of metal foams such as foamed nickel, cobalt, copper or iron or porous conductive materials The preparation method of the catalyst and its application in the oxygen evolution reaction of electrolytic water in alkaline solution, wherein M refers to low-cost iron, cobalt, nickel, copper and other single or double transition metals. Background technique [0002] Continuing concerns about energy shortages and environmental pollution are driving attention towards clean energy alternatives to fossil fuels. Various forms of new energy such as wind energy, hydropower, solar energy, and geothermal energy have been rapidly applied and developed. These energy sources have the advantages of large reserves, clean, environmentally...

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
IPC IPC(8): B01J23/75C25B1/04C25B11/091C25B11/061
CPCB01J23/75B01J35/0033C25B1/04C25B11/04Y02E60/36
Inventor 周海青曾劲松廖礼玲李东阳余芳
Owner HUNAN NORMAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap