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Self-supporting high-density copper-cobalt-selenium nanotube electrode and preparation method thereof

A high-density, selenium nanotechnology, applied in the direction of electrodes, nanotechnology, nanotechnology, etc., can solve the problems of lowering the reaction energy barrier, low storage, high price, etc., and achieve the improvement of catalytic activity, accelerated transmission process, and large specific surface area. Effect

Active Publication Date: 2020-06-23
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The theoretical decomposition potential required in the process of electrolysis of water is 1.23 V. However, there is a large overpotential energy barrier and a significant polarization process in the actual electrolysis of water, resulting in a decomposition potential much higher than 1.23 V in the actual electrolysis of water. , so a catalyst is needed to lower the reaction energy barrier, thereby reducing energy consumption
At present, the most efficient electrocatalyst for hydrogen evolution is still the noble metal Pt, but the reserves of Pt metal on the earth are small, and the price is expensive, so it is not suitable for large-scale application in the industrial production of electrolyzed water.
Similarly, the oxygen evolution electrocatalyst is based on RuO 2 and IrO 2 The performance is the best, but the precious metal elements Ru and Ir contained in it also have the problems of low reserves and high price, which greatly restricts its application and development in electrolyzed water and chlor-alkali industry

Method used

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  • Self-supporting high-density copper-cobalt-selenium nanotube electrode and preparation method thereof
  • Self-supporting high-density copper-cobalt-selenium nanotube electrode and preparation method thereof
  • Self-supporting high-density copper-cobalt-selenium nanotube electrode and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of a self-supporting high-density copper-cobalt-selenium nanotube electrode is carried out according to the following steps:

[0026] Step 1: Sonicate the copper foam (1.0 cm×4.0 cm×1.5 mm) with hydrochloric acid (3.0 M HCl), acetone, absolute ethanol, and ultrapure water for several minutes in sequence, and dry it for later use.

[0027] Step 2: Stir 50 mL of a mixed solution of 0.08 M cobalt chloride, 0.04 M copper chloride and 0.16 M urea evenly, put it into a hydrothermal reaction kettle together with foamed copper, and then put the reaction kettle into a hydrothermal tank for Hydrothermal reaction, the reaction time is 12 h, and the reaction temperature is 120 °C.

[0028] Step 3: The sample Cu-Co-O obtained after the hydrothermal reaction was repeatedly washed several times with ultrapure water and alcohol to remove impurities and precipitates on the surface, and then dried in a vacuum drying oven for 8 hours.

[0029] Step 4: Stir 3 mL of a ...

Embodiment 2

[0034] A preparation method of a self-supporting high-density copper-cobalt-selenium nanotube electrode is carried out according to the following steps:

[0035] Step 1: Clean the copper foam (1.0 cm × 4.0 cm × 1.5 mm) with hydrochloric acid (3.0 M HCl), acetone, absolute ethanol, and ultrapure water for several minutes, and dry it for later use.

[0036] Step 2: Stir 50 mL of a mixed solution of 0.04 M cobalt chloride, 0.02 M copper chloride and 0.12 M urea evenly, put it into a hydrothermal reaction kettle together with foamed copper, and then put the reaction kettle into a hydrothermal tank for Hydrothermal reaction, the reaction time is 8 h, the reaction temperature is 100 °C.

[0037]Step 3: The sample Cu-Co-O obtained after the hydrothermal reaction was repeatedly washed several times with ultrapure water and alcohol to remove impurities and precipitates on the surface, and dried in a vacuum drying oven for 8 hours.

[0038] Step 4: Stir 3 mL of a mixed solution contain...

Embodiment 3

[0042] A preparation method of a self-supporting high-density copper-cobalt-selenium nanotube electrolysis water electrode is carried out according to the following steps:

[0043] Step 1: Sonicate foamed copper (1.0 cm×4.0 cm×1.5 mm) with hydrochloric acid (3.0 M HCl), acetone, absolute ethanol, and ultrapure water for several minutes in sequence, and dry it for later use.

[0044] Step 2: Stir 50 mL of a mixed solution of 0.05 M cobalt chloride, 0.1 M copper chloride and 0.18 M urea evenly, put it into a hydrothermal reaction kettle together with foamed copper, and then put it into a hydrothermal tank for hydrothermal reaction , the reaction time is 14h, and the reaction temperature is 150°C.

[0045] Step 3: The sample Cu-Co-O after the hydrothermal reaction was repeatedly washed several times with ultrapure water and alcohol to remove impurities and precipitates on the surface, and then dried in a vacuum drying oven for 8 hours.

[0046] Step 4: Stir 3 mL of a mixed solut...

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Abstract

The invention discloses a self-supporting high-density copper-cobalt-selenium nanotube electrolysis water electrode and a preparation method thereof, which belong to the field of electrocatalytic water decomposition. The preparation method of the catalytic electrode comprises the following steps: firstly, combining copper and cobalt in a first-step hydrothermal reaction to form a nanowire structure; and then, through a second-step hydrothermal reaction, combining copper and cobalt components in the nanowire with a selenium element, and generating a densely-arranged nanotube array structure under the action of a Kirkendall effect. The prepared self-supporting high-density copper-cobalt-selenium nanotube electrode can provide a relatively large electrochemical active surface area, more active sites are exposed, and relatively excellent cathode hydrogen evolution, anode oxygen evolution and full hydrolysis performance can be realized under an alkaline condition.

Description

technical field [0001] The invention relates to a three-dimensional self-supporting copper-cobalt-selenium nanotube electrode which can be used in cathode hydrogen evolution reaction and anode oxygen evolution reaction in alkaline solution and its preparation method, which belongs to the field of material science and technology and electrolyzed water for hydrogen production, oxygen production and chlor-alkali industry field. Background technique [0002] With the continuous development of human civilization and social economy and culture, the consumption of energy is gradually increasing. Environmental problems such as acid rain, greenhouse effect, and smog brought about by the burning of fossil fuels are also threatening the survival and development of human beings all the time. Seeking a sustainable, environment-friendly clean energy has become the primary task of human exploration. Hydrogen is gradually recognized by people for its abundant sources, efficient combustion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B11/03C25B1/04B82Y30/00B82Y40/00
CPCC25B1/04B82Y30/00B82Y40/00C25B11/031C25B11/091Y02E60/36
Inventor 王孝广古训迪马自在李晋平唐宾
Owner TAIYUAN UNIV OF TECH
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