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Preparation method and application of dendritic morphology FeNi3 phase electrocatalyst powder

A catalyst and morphology technology, applied in the field of preparation of FeNi3 phase electrocatalyst powder with dendritic morphology, can solve the problems of high cost, limited large-scale application, limited resources, etc., and achieve easy operation, excellent catalytic performance, beautiful dendrites and other problems. effect of structure

Active Publication Date: 2020-01-10
山西师范大学
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, high cost and limited resources severely limit their large-scale application in commercial water electrolysis for hydrogen production.

Method used

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  • Preparation method and application of dendritic morphology FeNi3 phase electrocatalyst powder
  • Preparation method and application of dendritic morphology FeNi3 phase electrocatalyst powder
  • Preparation method and application of dendritic morphology FeNi3 phase electrocatalyst powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Prepare a mixed aqueous solution of 0.04 mol / L nickel sulfate, 0.01 mol / L ferrous sulfate and 0.1 mol / L sodium sulfate as an electrodeposition solution; wash the copper foil with absolute ethanol and deionized water as an electrodeposition carrier. Using copper foil as the working electrode, Ag / AgCl electrode as the counter electrode, and platinum sheet electrode as the reference electrode, use an electrochemical workstation (CHI660D) to react at a constant voltage of -1.3V at 25°C for 5 minutes. Deposit a layer of FeNi 3 electrocatalyst, and then scrape off the powder on the surface of the copper foil to obtain a dendrite FeNi 3 Electrocatalyst powder.

[0037] Such as figure 1 As shown, it is shown that the dendrite morphology FeNi prepared in Example 1 3 The XRD comparison diagram between the phase electrocatalyst powder, the electrodeposition composite catalytic electrode (powder + copper foil) and the copper foil support, it is obvious that the catalyst is displ...

Embodiment 2

[0041] Prepare a mixed aqueous solution of 0.03 mol / L nickel sulfate, 0.02 mol / L ferrous sulfate and 0.2 mol / L sodium sulfate as an electrodeposition solution; wash the copper foil with absolute ethanol and deionized water as an electrodeposition carrier. Using copper foil as the working electrode, Ag / AgCl electrode as the counter electrode, and platinum sheet electrode as the reference electrode, use an electrochemical workstation (CHI660D) to react at a constant voltage of -1.2V at 25°C for 5 minutes. Deposit a layer of FeNi 3 electrocatalyst, and then scrape off the powder on the surface of the copper foil to obtain a dendrite FeNi 3 Electrocatalyst powder.

[0042] Such as image 3 Shown are the XRD comparison charts between the powder electrocatalysts prepared in Examples 1, 2, 3, and 4. Obviously, the catalyst powder that embodiment 2 prepares is identified as FeNi 3 phase; such as Figure 4 Shown is the comparison diagram of the LSV polarization curves between the ...

Embodiment 3

[0044] Prepare a mixed aqueous solution of 0.045 mol / L nickel sulfate, 0.005 mol / L ferrous sulfate and 0.3 mol / L sodium sulfate as an electrodeposition solution; wash the copper foil with absolute ethanol and deionized water as an electrodeposition carrier. Using copper foil as the working electrode, Ag / AgCl electrode as the counter electrode, and platinum sheet electrode as the reference electrode, use an electrochemical workstation (CHI660D) to react at a constant voltage of -1.3V at 25°C for 5 minutes. Deposit a layer of FeNi 3 electrocatalyst, and then scrape off the powder on the surface of the copper foil to obtain a dendrite FeNi 3 Electrocatalyst powder.

[0045] Such as image 3 Shown, the catalyst powder that embodiment 3 prepares is identified as FeNi 3 Mutually. Such as Figure 4 Shown, the FeNi that embodiment 3 prepares 3 The catalyst powder also exhibits good oxygen evolution performance under alkaline conditions (1 mol / L sodium hydroxide, pH = 14), when j...

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Abstract

Belonging to the technical field of preparation of oxygen evolution reaction electrocatalyst materials, the invention relates to a preparation method and application of a dendritic morphology FeNi3 phase electrocatalyst powder. The method includes: adding a sodium sulfate solution as a plating solution additive into an electroplating solution containing nickel and iron ions, adopting a three-electrode system, taking a copper foil as a working electrode, employing a platinum sheet electrode as a counter electrode, using an Ag / AgCl electrode as a reference electrode, firstly utilizing direct current electrodeposition technique and then performing powder scraping to obtain the dendritic morphology FeNi3 phase electrocatalyst powder. The direct current electrodeposition technique has the advantages of simple operation, energy saving and low consumption, and by means of powder scraping, the FeNi3 phase electrocatalyst powder can be obtained more simply. The ferronickel OER electrocatalyst prepared by the method provided by the invention has a beautiful dendritic crystal structure, and has more excellent catalytic performance than the noble metal catalyst RuO2.

Description

technical field [0001] The invention relates to a dendrite morphology FeNi 3 The preparation method and application of phase electrocatalyst powder belong to the technical field of electrocatalyst material preparation for oxygen evolution reaction. Background technique [0002] With the intensification of environmental pollution and energy crisis, renewable and low-carbon sustainable energy as an alternative to traditional fossil fuels (coal, oil, natural gas, etc.) has received extensive attention. Hydrogen (H 2 ) has the highest energy density per unit mass, which is 140MJ / kg. The product is environmentally friendly and has received widespread attention as the next-generation energy carrier in the 21st century. Water electrolysis is a flexible and sustainable method to produce high-purity hydrogen, which involves anodic oxygen evolution reaction (OER in alkaline solution) and cathodic hydrogen evolution reaction (HER in alkaline solution). Compared with HER, the OER pro...

Claims

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Application Information

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IPC IPC(8): B01J23/755C25B1/04C25B11/06
CPCB01J23/755C25B1/04C25B11/091B01J35/33Y02E60/36
Inventor 魏学东陈伟凤刘楠
Owner 山西师范大学
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