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FeCoNiIrRu high-entropy nanoparticle catalytic material applied to acidic oxygen evolution reaction and preparation method of FeCoNiIrRu high-entropy nanoparticle catalytic material

A nanoparticle and catalytic material technology, applied in electrolytic components, electrodes, electrolytic process, etc., can solve the problems of limited commercial application, inapplicability to acidic environment, high price, etc., and achieve high acidic oxygen evolution reaction activity and stability, The effect of enhancing the electron transport rate and improving the catalytic activity

Active Publication Date: 2021-07-02
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, Ir, Ru and their oxides are the most efficient electrocatalysts for oxygen evolution reaction, however, these noble metal catalysts are not only expensive but also scarce, which greatly limits their commercial application.
Although many non-noble metal-based OER catalysts have been proposed, such as NiFe-based metal oxides / hydroxides, these low-cost electrocatalysts are not suitable for acidic environments

Method used

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  • FeCoNiIrRu high-entropy nanoparticle catalytic material applied to acidic oxygen evolution reaction and preparation method of FeCoNiIrRu high-entropy nanoparticle catalytic material
  • FeCoNiIrRu high-entropy nanoparticle catalytic material applied to acidic oxygen evolution reaction and preparation method of FeCoNiIrRu high-entropy nanoparticle catalytic material
  • FeCoNiIrRu high-entropy nanoparticle catalytic material applied to acidic oxygen evolution reaction and preparation method of FeCoNiIrRu high-entropy nanoparticle catalytic material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) getting 0.2mmol iron chloride, 0.2mmol cobalt chloride, 0.2mmol nickel chloride, 0.2mmol iridium chloride and 0.2mmol ruthenium chloride to join in 15g mass fraction is the DMF / ethanol of the polyvinylpyrrolidone of 13wt% ( Mass ratio 1:1) in the solution (the total molar concentration corresponding to the metal salt is respectively 0.067mmol / g), evenly stirred by magnetic force, and then the solution is spun by electrospinning, and the spinning voltage is controlled to be 18KV, The distance from the drum of the receiving device to the spinning needle tip was 16 cm, and the flow rate of the solution was 0.2 mL / min to obtain a FeCoNiIrRu / PVP nanofiber membrane.

[0048] (2) Put 0.2 g of the prepared FeCoNiIrRu / PVP nanofiber membrane into a corundum boat and place it in the middle of the tube furnace. First, the temperature was raised to 200° C. at a heating rate of 5° C. / min, and the pre-oxidation was carried out by keeping the temperature in an air atmosphere for 3 ...

Embodiment 2

[0057] Embodiment 2 explores the influence of calcination temperature on catalytic material

[0058] Step (1) is identical with embodiment 1;

[0059] Step (2): Put 0.2g of the prepared FeCoNiIrRu / PVP nanofiber membrane into the corundum boat and place it in the middle of the tube furnace. First, the temperature was raised to 200° C. at a heating rate of 5° C. / min, and the pre-oxidation was carried out by keeping the temperature in an air atmosphere for 3 hours. After the heat preservation is completed, the temperature is raised to 900 or 1100° C. at a rate of 5° C. / min under an argon atmosphere, and the temperature is maintained for 3 hours under an inert atmosphere. After the heat preservation, the temperature was naturally cooled down to room temperature under an inert gas atmosphere, and FeCoNiIrRu / NPs-900 and FeCoNiIrRu / NPs-1100 electrolytic water catalytic materials were obtained respectively.

[0060] According to the method in Example 1, the acidic oxygen evolution p...

Embodiment 3

[0062] Example 3 explores the influence of metal salt dosage ratio conditions on catalytic materials

[0063] Step (1): With reference to Example 1, the mol ratio of ferric chloride, cobalt chloride, nickel chloride, iridium chloride and ruthenium chloride is replaced by 2:2:2:1:3 (0.2mmol chloride iron, 0.2mmol cobalt chloride, 0.2mmol nickel chloride, 0.1mmol iridium chloride and 0.3mmol ruthenium chloride), or 2:2:2:3:1 (0.2mmol iron chloride, 0.2mmol cobalt chloride, 0.2mmol nickel chloride, 0.3mmol iridium chloride and 0.1mmol ruthenium chloride), or 2:2:2:3:3 (0.2mmol ferric chloride, 0.2mmol cobalt chloride, 0.2mmol nickel chloride, 0.3mmol iridium chloride and 0.3mmol ruthenium chloride), and other conditions remain unchanged, Fe 2 co 2 Ni 2 Ir 1 Ru 3 / PVP nanofiber membrane, Fe 2 co 2 Ni 2 Ir 3 Ru 1 / PVP nanofiber membrane and Fe 2 co 2 Ni 2 Ir 3 Ru 3 / PVP nanofiber membrane.

[0064] Step (2) is identical with embodiment 1, makes Fe respectively 2 co...

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Abstract

The invention discloses a FeCoNiIrRu high-entropy nanoparticle catalytic material applied to an acidic oxygen evolution reaction and a preparation method of the FeCoNiIrRu high-entropy nanoparticle catalytic material, and belongs to the field of preparation of catalytic materials. The transition metals Fe, Co and Ni are introduced to reduce the use amount of the noble metals Ir and Ru, and the five elements are uniformly dispersed to form the FeCoNiIrRu high-entropy nanoparticle catalytic material loaded on the carbon nanofibers through an electrostatic spinning method in combination with high-temperature calcination, so that the FeCoNiIrRu high-entropy nanoparticle catalytic material has very excellent catalytic oxygen evolution performance under an acidic condition, the oxygen evolution activity is superior to that of commercial IrO2, and good application prospects are realized.

Description

technical field [0001] The invention specifically relates to a FeCoNiIrRu high-entropy nanoparticle catalytic material applied to an acidic oxygen evolution reaction and a preparation method thereof, belonging to the field of catalytic material preparation. Background technique [0002] In recent years, due to the rapid consumption of energy caused by the continuous growth of population, and the environmental pollution caused by the use of fossil fuels has become increasingly serious, people are eager to develop more environmentally friendly energy sources. According to research, the energy generated by the combustion of hydrogen per unit mass is as high as 2.5 times that of gasoline, and water is the only product of hydrogen combustion, so hydrogen has been proved to be an ideal energy carrier. [0003] Electrocatalytic hydrolysis technology has attracted much attention due to its pure product, high conversion efficiency, and simple equipment. Oxygen evolution reaction (OE...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/093C25B1/04
CPCC25B1/04Y02E60/36
Inventor 朱罕祝振锋孙淑慧陆双龙段芳杜明亮
Owner JIANGNAN UNIV
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