A kind of iron-rich nanobelt oxygen evolution electrocatalyst and preparation method thereof

An electrocatalyst, nanobelt technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of poor iron-based OER catalyst activity, increase catalyst production cost, etc., and achieve excellent OER catalysis performance, reduction of overpotential and energy consumption, effect of short growth cycle

Active Publication Date: 2022-02-22
LINYI UNIVERSITY
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the second most abundant metal on earth, iron is cheaper than nickel and cobalt, but the activity of iron-based OER catalysts is poor.
In addition, most of the OER catalyst preparation process requires high temperature or external voltage, which increases the production cost of the catalyst.

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
  • A kind of iron-rich nanobelt oxygen evolution electrocatalyst and preparation method thereof
  • A kind of iron-rich nanobelt oxygen evolution electrocatalyst and preparation method thereof
  • A kind of iron-rich nanobelt oxygen evolution electrocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The nickel foam with a length of 20 mm and a width of 5 mm was ultrasonically cleaned with acetone, 1M HCl, absolute ethanol and deionized water for 30 minutes to remove surface impurities. The iron foam of the same size was ultrasonically cleaned with acetone, absolute ethanol and deionized water for 30 minutes in order to remove impurities on the surface. The above-mentioned foamed nickel is connected with the foamed iron with a wire.

[0042] Add 20 mL of 1M NaCl, 18.2 mL of 5 mM CoCl to the reactor 2 ·6H 2 O and 1.8 mL of 5 mM VCl 3 . i.e. CoCl 2 ·6H 2 O and VCl 3 The volume ratio is 10:1. The reaction was carried out at room temperature and stirring for 8 hours, and after the reaction was completed, a (Co, V)-FeOOH nanometer charged catalyst was obtained. The nanosheet morphology of (Co, V)-FeOOH was obtained by scanning electron microscopy, as figure 1 shown. The crystal structure of (Co, V)-FeOOH was obtained by X-ray diffraction, such as figure 2 As ...

Embodiment 2

[0044]The experimental process is the same as in Example 1, and the change is that the electrolyte is respectively composed of 20mL of 1M NaCl and 20mL of 5mM CoCl 2 ·6H 2 O composition. After the reaction, a Co-FeOOH nanocharged catalyst with a small amount of Co-modified FeOOH matrix was obtained. The nanosheet morphology of Co-FeOOH was obtained by scanning electron microscopy, such as Figure 4 shown. The crystal structure of Co-FeOOH was obtained by X-ray diffraction, such as Figure 5 , indicating that a small amount of Co doping did not cause changes in the crystal structure.

Embodiment 3

[0046] The experimental process is the same as in Example 1, and the change is that the electrolyte is respectively composed of 20mL of 1M NaCl and 20mL of 5mM VCl 3 constitute. After the reaction, a small amount of V-FeOOH nano-charged catalyst with V-modified FeOOH matrix was obtained. The morphology of nanosheets of V-FeOOH was obtained by scanning electron microscopy, such as Figure 6 shown. The crystal structure of V-FeOOH was obtained by X-ray diffraction, such as Figure 7 , indicating that a small amount of V doping did not cause changes in the crystal structure.

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
electric potential / voltageaaaaaaaaaa
lengthaaaaaaaaaa
widthaaaaaaaaaa
Login to view more

Abstract

The invention discloses an iron-rich nanobelt oxygen evolution electrocatalyst and a preparation method thereof, which belong to the technical field of catalysts. The catalyst of the invention is an iron-rich nanobelt oxygen evolution electrocatalyst modified with Co and / or V, and is a kind of catalyst with different chemically active types. The two metals (Ni and Fe) were connected, and a galvanic cell was built in the presence of an electrolyte. In 1.0M KOH solution, the catalyst exhibits excellent OER catalytic performance: the overpotential η at a low specific current density 10 =230mV, η 500 =322mV and low Tafel 47.6mV / dec, and can run continuously and stably for 50h. Moreover, the catalyst has an ultra-thin nanobelt morphology, a large specific surface area, a simple preparation method, no need for high temperature or external voltage, high efficiency and energy saving.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to an iron-rich nanobelt oxygen evolution electrocatalyst and a preparation method thereof. Background technique [0002] As an environmentally friendly secondary energy source, hydrogen has the advantages of high combustion calorific value and great application potential, and is considered to be the ultimate energy source needed by human society. Electrocatalytic water splitting for hydrogen production has the characteristics of green and mild method and high purity of hydrogen production, and it is a hydrogen production method with great application prospects. [0003] However, the anodic reaction (oxygen evolution reaction, OER) of electrocatalytic water splitting is a four-electron transfer reaction, which requires a high reaction barrier, which increases the energy consumption of electrolyzed water for hydrogen production, and limits the large-scale application of...

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): C25B11/091C25B1/04B82Y30/00B82Y40/00
CPCC25B1/04Y02E60/36
Inventor 刘伟李传明
Owner LINYI 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