Preparation method of iron-nickel bimetallic selenide nanosphere electrocatalyst

A catalyst and bimetallic technology, applied in selenium/tellurium compounds, chemical instruments and methods, elemental compounds other than selenium/tellurium, etc., can solve problems such as poor conductivity, achieve improved electrochemical stability, and simple preparation process The effect of convenience and broad application prospects

Pending Publication Date: 2022-06-03
SHANGHAI UNIVERSITY OF ELECTRIC POWER
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nickel selenide, as a semiconductor material, has poor electric

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
  • Preparation method of iron-nickel bimetallic selenide nanosphere electrocatalyst
  • Preparation method of iron-nickel bimetallic selenide nanosphere electrocatalyst
  • Preparation method of iron-nickel bimetallic selenide nanosphere electrocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Dissolve 8 g of flaky sodium hydroxide in 120 mL of deionized water and stir until the solution is clear.

[0036] Mix 0.5 g of Se powder and 20 mL of N 2 H 4 ·H 2 O was added to the above solution and stirred for 0.5h.

[0037] Then add 0.75g of Ni (NO 3 ) 2 ·6H 2 O and 0.26g Fe(NO 3 ) 3 ·9H 2 O powder, stir again for 3h.

[0038] Centrifuge and wash with deionized water and anhydrous ethanol for 3 times respectively, and then put it into a drying oven at 70 °C for 16 h. The obtained product is an efficient iron-nickel bimetallic selenide nanosphere electrocatalyst.

[0039] SEM images and HRTEM images of the prepared nanosphere electrocatalysts were detected, and the results were as follows figure 1 , figure 2shown. It is found that the nanosphere electrocatalyst is composed of a porous framework composed of nano-microspheres with uniform distribution of elements, which increases the active site and electron transport rate, and can clearly see Fe 0.17 Ni...

Embodiment 2

[0041] The inks were made and tested for electrochemical performance. Take 5mg of the prepared iron-nickel bimetallic selenide nanosphere electrocatalyst, add 25ul of Nafion, 200ul of deionized water and 800ul of deionized ethanol, ultrasonically treat for 30min, take 250ul of ink and drop it on a foam with an area of ​​1×1.5cm On nickel, and vacuum-dried at 60 °C for 4 h, all tests were carried out using Chenhua CHI760E electrochemical workstation, the test temperature was room temperature, the electrolyte was 1M KOH solution, and the iR compensation was 95%.

[0042] Take commercial IrO 2 Electrocatalyst 5mg, add 25ul Nafion, 200ul deionized water and 800ul absolute ethanol, ultrasonically treat for 30min, take 250ul ink drop on nickel foam with an area of ​​1 × 1.5cm, and vacuum dry at 60 ° C for 4h, All tests were performed using Chenhua CHI760E electrochemical workstation, the test temperature was room temperature, the electrolyte was 1MKOH solution, and the iR compensat...

Embodiment 3

[0046] In addition to Se powder, Ni (NO 3 ) 2 ·6H 2 O and Fe (NO 3 ) 3 ·9H 2 Except for the different amount of O added, other experimental procedures are the same as those in Example 1. Se powder, Ni (NO 3 ) 2 ·6H 2 O and Fe (NO 3 ) 3 ·9H 2 The addition amount of O and the performance data of the obtained nanosphere electrocatalyst are shown in Table 1.

[0047] Table 1

[0048]

[0049] Through Example 1, Example 3 and Table 1, it can be found that the products prepared by Fe, Ni and Se with different atomic ratios also have certain differences in overpotential. Although the overpotential of the product can be reduced to less than 300mV when the atomic ratio of Ni is 0, when the atomic ratio of Fe and Ni is 17:83, the overpotential of the product can be reduced to 227mV. Under this ratio, Fe and Ni synergize. Unexpected technical results have been achieved.

[0050] The invention provides a preparation method and application of an efficient iron-nickel bimet...

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 provides a preparation method and application of an efficient iron-nickel bimetallic selenide nanosphere electrocatalyst. The preparation method comprises the following steps: dissolving flaky NaOH in deionized water, stirring until the solution is clear, adding Se powder and N2H4.H2O, stirring, then adding Ni (NO3) 2.6 H2O and Fe (NO3) 3.9 H2O powder, stirring again, centrifuging and washing the obtained turbid liquid through deionized water and absolute ethyl alcohol, and drying in a drying box, so as to obtain the selenium-rich selenium-rich selenium-rich selenium-rich selenium-rich selenium-rich selenium-rich selenium-rich selenium-rich selenium-rich selenium-rich selenium-rich selenium-rich selenium-rich selenium-rich selenium-rich selenium. The obtained product is the efficient iron-nickel bimetallic selenide nanosphere electrocatalyst. Compared with the prior art, the efficient iron-nickel bimetal selenide nanosphere electrocatalyst is prepared, regulated and synthesized in one step through a coprecipitation method, the preparation process is simple and convenient, the obtained catalyst has higher catalytic activity and stability, through the synergistic interaction of Se, Fe and Ni, the overpotential of the oxygen evolution reaction of electrolyzed water can be reduced to 227mV, and the electrocatalyst can be used for preparing the high-efficiency iron-nickel bimetal selenide nanosphere electrocatalyst. The electrochemical stability is greatly improved, so that the material has a very wide application prospect in the aspects of water decomposition, large-capacity energy storage equipment and the like.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysts, and in particular relates to a preparation method of an iron-nickel bimetallic selenide nanosphere electrocatalyst. Background technique [0002] With the massive consumption of fossil fuels, energy shortage and environmental pollution are gradually threatening the development of society and the progress of civilization. Therefore, there is an urgent need to develop new energy sources to alleviate energy demand. Hydrogen energy stands out among many new energy sources due to its environmental protection, high energy density, and low cost, and has become one of the most promising alternatives to traditional energy. Electrochemical water splitting, as an efficient hydrogen production technology, consists of two important half-reactions: oxygen evolution reaction and hydrogen evolution reaction. The four-electron transport process of the anodic half-reaction, the oxygen evolution reaction...

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): C01B19/00B82Y40/00C25B1/04C25B11/042
CPCC01B19/002B82Y40/00C25B1/04C25B11/042C01P2004/03C01P2004/04C01P2004/32Y02E60/36
Inventor 吴江章程朱群志刘开源付在国刘启贞马昕霞杨浩彦
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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