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Core-shell chain-shaped nickel-based selenide/iron oxyhydroxide composite catalyst as well as preparation method and application thereof

A technology of iron oxyhydroxide and composite catalyst, which is applied in the direction of electrolysis components, electrodes, electrolysis process, etc., can solve the problems of poor conductivity of iron oxyhydroxide alone, and achieve the effect of improving OER performance, reducing cost and low cost

Pending Publication Date: 2021-12-10
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Iron oxyhydroxide alone is poorly conductive, but its strong adsorption properties for oxygen-containing intermediates make it an ideal compensator for nickel / cobalt-based composites

Method used

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  • Core-shell chain-shaped nickel-based selenide/iron oxyhydroxide composite catalyst as well as preparation method and application thereof
  • Core-shell chain-shaped nickel-based selenide/iron oxyhydroxide composite catalyst as well as preparation method and application thereof
  • Core-shell chain-shaped nickel-based selenide/iron oxyhydroxide composite catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A preparation method of a core-shell chain nickel-based selenide / iron oxyhydroxide composite catalyst, specifically comprising the following steps:

[0040] (1) Preparation of nickel-based metal core-shell chain nanomaterials: Dissolve 0.5mmol nickel(II) acetylacetonate in 45ml ethylene glycol, then slowly add 1ml85% hydrazine hydrate; stir the solution for 5min to mix evenly, then transfer to 80ml In an autoclave, heat to 180°C for 8h; collect the product after cooling, wash with deionized water and absolute ethanol three times, and then vacuum dry at 60°C for 10h to obtain a nickel-based metal core-shell chain nanomaterial;

[0041] (2) Selenization treatment of nickel-based metal core-shell chain nanomaterials: add 7.5mmol selenium powder, 15mmol sodium hydroxide and 50ml N,N-dimethylformamide into an 80ml autoclave, stir vigorously for 15min, then add 0.3ml Hydrazine hydrate; then add 20 mg of nickel-based metal core-shell chain-like nanomaterials and mix well, heat...

Embodiment 2

[0044] A preparation method of a core-shell chain nickel-based selenide / iron oxyhydroxide composite catalyst, specifically comprising the following steps:

[0045] (1) Preparation of nickel-based metal core-shell chain nanomaterials: 0.4mmol nickel acetylacetonate (II) was dissolved in 40ml ethylene glycol, then slowly added 0.5ml85% hydrazine hydrate; after the solution was stirred for 5min to mix evenly, transferred to In an 80ml autoclave, heat to 180°C for 8h; collect the product after cooling, wash with deionized water and absolute ethanol three times respectively, and then vacuum dry at 60°C for 10h to obtain a nickel-based metal core-shell chain nanomaterial;

[0046] (2) Selenization treatment of nickel-based metal core-shell chain nanomaterials: Add 6mmol selenium powder, 14mmol sodium hydroxide and 40ml N,N-dimethylformamide into an 80ml autoclave, stir vigorously for 15min, then add 0.2ml hydration Hydrazine; then add 10 mg of nickel-based metal core-shell chain nan...

Embodiment 3

[0049] A preparation method of a core-shell chain nickel-based selenide / iron oxyhydroxide composite catalyst, specifically comprising the following steps:

[0050] (1) Preparation of nickel-based metal core-shell chain-shaped nanomaterials: Dissolve 0.6mmol nickel(II) acetylacetonate in 50ml ethylene glycol, then slowly add 2ml85% hydrazine hydrate; stir the solution for 5min to mix evenly, then transfer to 80ml In an autoclave, heat to 180°C for 8h; collect the product after cooling, wash with deionized water and absolute ethanol three times, and then vacuum dry at 60°C for 10h to obtain a nickel-based metal core-shell chain nanomaterial;

[0051] (2) Selenization treatment of nickel-based metal core-shell chain nanomaterials: add 9mmol selenium powder, 16mmol sodium hydroxide and 60ml N,N-dimethylformamide into an 80ml autoclave, stir vigorously for 15min, then add 0.4ml hydration Hydrazine; then add 50 mg of nickel-based metal core-shell chain nanomaterials and mix well, he...

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Abstract

The invention discloses a core-shell chain-shaped nickel-based selenide / iron oxyhydroxide composite catalyst as well as a preparation method and application thereof, and belongs to the technical field of new energy materials and electrochemical energy storage. The preparation method comprises the following steps: mixing nickel acetylacetonate (II), ethylene glycol and hydrazine hydrate, and performing hydrothermal reaction to prepare a nickel nano chain material; then adding the Ni3Se4 porous nanochain material into a mixed solution of selenium powder, sodium hydroxide, N, N-dimethylformamide and hydrazine hydrate, and performing heating and reacting to obtain the Ni3Se4 porous nanochain material; dispersing the obtained Ni3Se4 porous nano chain material in deionized water, adding ferrous sulfate, performing stirring, and performing heating reaction at 50 DEG C to obtain the Ni3Se4@FeOOH porous nano chain. The invention discloses a core-shell chain-like nanostructured nickel-based selenide / iron oxyhydroxide composite catalyst prepared by a simple chemical hydrothermal method, and the catalyst shows excellent electrochemical properties such as lower overpotential and good stability in oxygen evolution reaction, and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of new energy materials and electrochemical energy storage, relates to a method for preparing an inorganic nano-catalyst material, and specifically discloses a method for preparing a core-shell chain nickel-based selenide / iron oxyhydroxide composite catalyst. Background technique [0002] With the global crisis of energy and environmental issues, there is an urgent need to explore clean energy, and mobile energy storage devices such as batteries and supercapacitors have been extensively studied and highly developed. Hydrogen, as a green and sustainable energy carrier for fuel cells, is considered as a promising alternative to traditional natural fossil fuels (i.e., coal, petroleum, etc.) due to its combustion product being only water and high energy density. Among the various hydrogen production methods developed so far, water splitting is considered the most likely one because of its high yield (>99.6%)....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/091
CPCC25B1/04C25B11/091Y02E60/36
Inventor 王春栋程卓尔
Owner HUAZHONG UNIV OF SCI & TECH
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