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Foamed nickel-based Nano-K2Fe4O7 catalyst, preparation method and application of foamed nickel-based Nano-K2Fe4O7 catalyst in efficient electrocatalytic hydrolysis

A nano-k2fe4o7, catalyst technology, applied in the field of electrocatalytic material preparation

Inactive Publication Date: 2020-10-30
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to some perovskite (ABO 3 )-like structures of oxygen ion conductors, there are almost no reports on the application of metal ion conductors in electrocatalytic hydrolysis

Method used

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  • Foamed nickel-based Nano-K2Fe4O7 catalyst, preparation method and application of foamed nickel-based Nano-K2Fe4O7 catalyst in efficient electrocatalytic hydrolysis
  • Foamed nickel-based Nano-K2Fe4O7 catalyst, preparation method and application of foamed nickel-based Nano-K2Fe4O7 catalyst in efficient electrocatalytic hydrolysis
  • Foamed nickel-based Nano-K2Fe4O7 catalyst, preparation method and application of foamed nickel-based Nano-K2Fe4O7 catalyst in efficient electrocatalytic hydrolysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] First, cut out 1*9cm 2 Nickel foam sheet (thickness 1mm, width 1cm, length 9cm), ultrasonic 10 minutes in the dilute hydrochloric acid solution of 2.0M; Use deionized water and ethanol to carry out multiple washings to the nickel foam after acid treatment afterwards, then treat The final foamed nickel is placed in a dry box for subsequent use; then, the dried foamed nickel is put into a polyethylene reaction liner, and then dissolved with KOH (72g), Fe(NO 3 ) 3 9H 2 The aqueous solution (~32mL) of O (4.04g) was transferred to the PTFE liner with nickel foam; finally, the reaction kettle was placed in an oven at 240°C for 48 hours, and the foamed nickel-based material obtained was In situ loading with Nano-K 2 Fe 4 o 7 The foamed nickel-based catalytic material, marked as Nano-K 2 Fe 4 o 7 .

[0038] The electrocatalytic hydrolysis performance test was carried out on the catalytic material prepared by the above method, and the reaction system was a standard thre...

Embodiment 2

[0046] Same as embodiment 1, under the premise that the foamed nickel width and length are constant (the width of the foamed nickel is 1cm, and the length is 9cm), only the thickness of the foamed nickel introduced is adjusted, that is, the foamed nickel thickness is adjusted to 0.5mm, the resulting product is marked as Nano-K 2 Fe 4 o 7 -0.5mm. Under the condition of 1.0M KOH, the electrocatalytic properties of the obtained samples are as follows: Figure 8 Shown:

[0047] In the process of electrocatalytic oxygen evolution, when the overpotential is 520mV, the current density of the material reaches 1000mA / cm 2 ,Such as Figure 8 as shown in (A);

[0048] In the process of electrocatalytic hydrogen evolution, when the overpotential is 490mV, the current density of the material reaches -1000mA / cm 2 ,Such as Figure 8 (B) shown.

Embodiment 3

[0050] Same as Example 1, under the premise that the foamed nickel thickness and length are constant (the thickness of the foamed nickel is 1mm, and the length is 9cm), only the width of the foamed nickel introduced into the reaction system is adjusted, that is, the width is adjusted to 1.2 cm, the resulting product is labeled Nano-K 2 Fe 4 o 7 -1.2cm. Under the condition of 1.0M KOH, the electrocatalytic properties of the obtained samples are as follows: Figure 9 Shown:

[0051] In the process of electrocatalytic oxygen evolution, when the overpotential is 428mV, the current density of the material reaches 1000mA / cm 2 ,Such as Figure 9 as shown in (A);

[0052] In the process of electrocatalytic hydrogen evolution, when the overpotential is 422mV, the current density of the material reaches -1000mA / cm 2 ,Such as Figure 9 (B) shown.

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Abstract

The invention discloses a foamed nickel-based Nano-K2Fe4O7 catalyst, a preparation method and application of the foamed nickel-based Nano-K2Fe4O7 catalyst in the aspect of efficient electrocatalytic hydrolysis, and belongs to the field of electrocatalytic material preparation technologies and application. The preparation method comprises the following steps: firstly, ultrasonically treating a substrate material with 2mol of diluted hydrochloric acid for 8-15 minutes, then respectively washing with deionized water and ethanol for several times, and drying for later use; and then adding the dried substrate material into a reaction system of K2Fe4O7 to carry out hydrothermal reaction, and drying to obtain the foamed nickel-based Nano-K2Fe4O7 catalyst disclosed by the invention. Experimental results show that the Nano-K2Fe4O7 prepared by the preparation method disclosed by the invention can output very large current (the current density is greater than 2000mA / cm < 2 >) in the OER and HER processes; and moreover, the stability can be kept for a long time (60 hours) when high current density (about 1500mA / cm < 2 >) is output, the preparation of a large-scale electrode material can be carried out, and the application of large-scale electro-catalytic hydrolysis is expected to be realized.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrocatalytic materials, in particular to a foamed nickel-based Nano-K 2 Fe 4 o 7 Catalysts, preparation methods and their applications in efficient electrocatalytic hydrolysis. Background technique [0002] The design and development of new energy sources has always been a worldwide topic. Like renewable energy such as wind energy, tidal energy, and solar energy, hydrogen energy has attracted extensive attention from researchers due to its high energy density. with CH 4 Compared with hydrogen production, water with the most abundant reserves in nature will produce high-purity H at the cathode when it is electrolyzed 2 (that is, catalyzing the hydrogen evolution reaction, HER), while at the anode, O 2 (that is, catalyzed oxygen evolution reaction, OER), and no additional products are generated. For this reason, electrocatalytic hydrolysis can greatly meet human needs for clean ene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78C25B1/04C25B11/06
CPCB01J23/78C25B1/04B01J35/33Y02E60/36
Inventor 袁宏明菅娟孔德琛
Owner JILIN UNIV
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