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Aluminum-doped three-dimensional nano-porous metal sulfide hydrogen evolution electrode preparation and application methods

A three-dimensional nano-porous metal technology, applied in the direction of electrodes, electrode shape/type, electrolysis process, etc., can solve the problems of weak bonding force between the active layer and the conductive substrate, limited types of commercial foam metals, single pore size, shape and composition, etc. , to achieve the effects of improved microstructure and chemical stability, strong designability and low price

Active Publication Date: 2018-12-21
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the multi-component modification layer is not in-situ constructed into an alloy with the foamed nickel or copper foam substrate, resulting in weakened binding force between the active layer and the conductive substrate, and it is easy to fall off or dissolve during the hydrogen production process, which reduces its hydrogen evolution reaction. Stability and durability in
At the same time, the types of commercial metal foams that can be directly used at present are limited, and the pore size, shape and composition are single, and the pore size is mostly hundreds of microns or even more than millimeters.

Method used

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  • Aluminum-doped three-dimensional nano-porous metal sulfide hydrogen evolution electrode preparation and application methods
  • Aluminum-doped three-dimensional nano-porous metal sulfide hydrogen evolution electrode preparation and application methods
  • Aluminum-doped three-dimensional nano-porous metal sulfide hydrogen evolution electrode preparation and application methods

Examples

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Embodiment 1

[0024] A method for preparing an aluminum-doped three-dimensional nanoporous cobalt sulfide hydrogen evolution electrode is carried out according to the following steps:

[0025] Step 1. Use a high-frequency induction melting furnace to heat cobalt and aluminum together to a molten state (the atomic percentage of aluminum is 90%), blow the molten alloy liquid into a graphite crucible with argon gas, and cool it under the protection of argon gas To form a rod-shaped alloy ingot, cut the alloy ingot into discs with a diameter of 14mm and a thickness of 1mm, and grind and polish the surface of the alloy sheet;

[0026] Step 2, the aluminum-cobalt alloy sheet obtained in step 1 is dealloyed in a sodium hydroxide solution with a molar concentration of 6mol / L, the reaction time is 0.5h, and then rinsed with ultrapure water several times and dried to obtain Nanoporous cobalt sheet;

[0027] Step 3, place the nanoporous cobalt sheet in the tubular annealing furnace, place the sulfur ...

Embodiment 2

[0030] A method for preparing an aluminum-doped three-dimensional nanoporous nickel sulfide hydrogen evolution electrode is carried out according to the following steps:

[0031] Step 1. Use a high-frequency induction melting furnace to heat nickel and aluminum together to a molten state (the atomic percentage of aluminum is 85%), blow the molten alloy liquid into a graphite crucible with argon gas, and cool it under the protection of argon gas To form a rod-shaped alloy ingot, cut the alloy ingot into discs with a diameter of 10mm and a thickness of 2mm, and grind and polish the surface of the alloy sheet;

[0032] Step 2, the aluminum-nickel alloy sheet obtained in step 1 is dealloyed in a potassium hydroxide solution with a molar concentration of 2mol / L, and the reaction time is 1.5h, then rinsed with ultrapure water several times and then dried to obtain Nanoporous nickel sheet;

[0033] Step 3, place the nanoporous nickel sheet in the tubular annealing furnace, place the...

Embodiment 3

[0035] A method for preparing an aluminum-doped three-dimensional nanoporous iron sulfide hydrogen evolution electrode is carried out according to the following steps:

[0036]Step 1. Use a high-frequency induction melting furnace to heat iron and aluminum together to a molten state (the atomic percentage of aluminum is 90%), blow the molten alloy liquid into a graphite crucible with argon gas, and cool it under the protection of argon gas To form a rod-shaped alloy ingot, cut the alloy ingot into discs with a diameter of 20mm and a thickness of 1.5mm, and grind and polish the surface of the alloy sheet;

[0037] Step 2. The aluminum-iron alloy sheet obtained in step 1 is dealloyed in a sodium hydroxide solution with a molar concentration of 1 mol / L. The reaction time is 1 h, and then rinsed with ultrapure water several times and dried to obtain nanoporous Iron sheets;

[0038] Step 3, place the nanoporous iron sheet in the tubular annealing furnace, place the sulfur powder u...

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Abstract

The invention relates to the technical field of electro-catalysis hydrogen production. A preparation method of an aluminum-doped three-dimensional nano-porous metal sulfide hydrogen evolution electrode comprises the steps of heating one or more of cobalt, nickel and ferrum and aluminum to the molten state, cooling to form a rod-shaped alloy ingot, and cutting the alloy ingot into alloy pieces withthe same thickness; carrying out alloy removal treatment on the alloy pieces in an alkaline corrosion solution; and putting in a tubular annealing furnace, putting sulfur powder onto the upstream ofa sample, and enabling sulfur steam and a porous metal sheet to contact and react at high temperature through the airflow drive of protective gas. The invention further relates to an application method of the electrode. The electrode prepared through the invention is remarkably increased in specific surface area, high in hydrogen evolution activity in the acid environment, and excellent in physical chemistry stability, can be directly used as a self-support electrode so as to carry out electro-catalysis hydrogen production, and is suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of electrocatalytic hydrogen production, in particular to a method for preparing an aluminum-doped three-dimensional nanoporous metal sulfide hydrogen evolution electrode. Background technique [0002] Today, problems such as smog, global warming, and vehicle exhaust emissions are gradually threatening the survival of human beings. At the same time, fossil fuels such as coal, oil, and natural gas are also increasingly depleted. As a non-polluting renewable energy, hydrogen energy has a source of Wide, high calorific value, good stability, clean and other advantages, it will become an ideal substitute for fossil fuels. Hydrogen can be produced in a variety of ways, such as fossil fuel hydrogen production, biological hydrogen production, photocatalytic water splitting hydrogen production, and electrolytic water hydrogen production, etc. Among them, electrolytic water hydrogen production is simple, efficient, a...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B11/03C25B1/04
CPCC25B1/04C25B11/04C25B11/031Y02E60/36
Inventor 王孝广王美张文娟原荷峰
Owner TAIYUAN UNIV OF TECH
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