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Preparation method of self-supporting composite electrode material

A composite electrode and composite material technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problems of limited commercial application, high price, low abundance of precious metals, etc., and achieve good stability, simple method and mild synthesis conditions. Effect

Active Publication Date: 2020-05-22
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Electrocatalytic water splitting consists of oxygen evolution reaction (OER) at the anode and hydrogen evolution reaction (HER) at the cathode. In order to reduce the high energy consumption in the process of OER and HER, noble metal materials (such as Pt / C and IrO 2 ) as a catalyst, but its commercial application is greatly limited due to the low abundance and high price of noble metals

Method used

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  • Preparation method of self-supporting composite electrode material
  • Preparation method of self-supporting composite electrode material
  • Preparation method of self-supporting composite electrode material

Examples

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Effect test

Embodiment 1

[0044] A preparation method of a self-supporting composite electrode material: comprising the following steps

[0045] 1. Cleaning steps:

[0046] Use anhydrous acetone, absolute ethanol, and deionized water to ultrasonically clean the carbon cloth (Taiwan W0S1009) in sequence, for 10 minutes each time, to remove surface pollutants;

[0047] 2. Electrodeposition steps:

[0048] At room temperature, use 20 ml of a solution containing 0.05M cobalt chloride hexahydrate and 0.03M citric acid as electrolyte, 30mA cm -2 Electrodeposition was performed for 1 hour, and after deposition, it was washed three times with deionized water and absolute ethanol respectively to obtain a cobalt / carbon cloth electrode material. The cathodic electrodeposition reaction is a two-electrode system, the working electrode is carbon cloth, and the counter electrode is carbon rod.

[0049] 3. Composite material preparation steps

[0050] Prepare N,N-dimethylformamide: anhydrous ethanol: deionized wat...

Embodiment 2

[0055] 1. Cleaning steps:

[0056] Use anhydrous acetone, absolute ethanol, and deionized water to ultrasonically clean the carbon cloth (Taiwan W0S1009) in sequence, for 10 minutes each time, to remove surface pollutants;

[0057] 2. Electrodeposition steps:

[0058] At room temperature, use 20 ml of a solution containing 0.05M cobalt chloride hexahydrate and 0.03M citric acid as electrolyte, 30mA cm -2 Electrodeposition was performed for 1 hour, and after deposition, it was washed three times with deionized water and absolute ethanol respectively to obtain a cobalt / carbon cloth electrode material. The cathodic electrodeposition reaction is a two-electrode system, the working electrode is carbon cloth, and the counter electrode is carbon rod.

[0059] 3. Composite material preparation steps

[0060] Prepare N,N-dimethylformamide: anhydrous ethanol: deionized water = 5:1:1 mixed solvent, dissolve 2,5-dihydroxyterephthalic acid in the mixed solvent to make the concentration ...

Embodiment 3

[0071] A preparation method of a self-supporting composite electrode material: comprising the following steps

[0072] 1. Cleaning steps:

[0073] Use anhydrous acetone, absolute ethanol, and deionized water to ultrasonically clean the carbon cloth (Taiwan W0S1009) in sequence, for 10 minutes each time, to remove surface pollutants;

[0074] 2. Electrodeposition steps:

[0075] At room temperature, use 20 ml of a solution containing 0.05M cobalt chloride hexahydrate and 0.03M citric acid as electrolyte, 30mA cm -2 Electrodeposition was performed for 1 hour, and after deposition, it was washed three times with deionized water and absolute ethanol respectively to obtain a cobalt / carbon cloth electrode material. The cathodic electrodeposition reaction is a two-electrode system, the working electrode is carbon cloth, and the counter electrode is carbon rod.

[0076] 3. Composite material preparation steps

[0077] Prepare a mixed solvent of N,N-dimethylformamide: absolute etha...

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PUM

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Abstract

The invention discloses a preparation method of a self-supporting composite electrode material. The preparation method comprises the following steps: 1, cleaning; 2, electro-deposition; and 3, preparation of the composite material. Compared with the prior art, the preparation method has the advantages that synthesis conditions are mild; the method is simple and convenient and has good stability; and the obtained material can be used as a catalyst with double functions of hydrogen evolution and oxygen evolution. When a current density is 20 mA / cm<2>, the minimum oxygen evolution overpotential can reach 226 mV; and when the current density is -10 mA / cm<2>, the minimum hydrogen evolution overpotential can reach 94 mV. The cobalt-based MOF / cobalt / carbon cloth layered composite self-supportingelectrode material is the same as a noble metal catalyst in the aspect of electrocatalytic water splitting.

Description

technical field [0001] The invention belongs to a preparation method of an electrode material, in particular to the technical field of a preparation method of a composite material. Background technique [0002] With global warming, energy crisis and worsening environmental pollution, it is urgent to find clean and renewable energy that can replace traditional fossil energy. Hydrogen energy, as an environmentally benign, high-calorific-value fuel and efficient secondary energy source, is attracting growing research interest in the fields of chemistry, materials, and energy sciences. Hydrogen can be obtained by cracking and separating fossil fuels, photo- or electrocatalytic water splitting, and biomass fermentation conversion. [0003] Electrocatalytic water splitting is recognized as one of the sustainable approaches to efficiently deliver pollution-free and renewable energy hydrogen. Electrocatalytic water splitting consists of oxygen evolution reaction (OER) at the anode...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B11/12C25B1/04C25D3/12C25D5/54
CPCC25B1/04C25D3/12C25D5/54C25B11/051C25B11/057C25B11/091Y02E60/36
Inventor 查庆庆倪永红
Owner ANHUI NORMAL UNIV
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