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Composite catalytic electrode for producing oxygen by electrolyzing water, and preparation method and application thereof

A catalytic electrode and oxygen recombination technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of restricting large-scale application, high cost and scarcity of precious metals, and achieve abundant raw materials, avoid loading process, and low production cost Effect

Active Publication Date: 2013-11-20
ZIBO ANZE STANDARD GAS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high cost and scarcity of noble metals limit their large-scale application in oxygen evolution reactions.

Method used

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  • Composite catalytic electrode for producing oxygen by electrolyzing water, and preparation method and application thereof
  • Composite catalytic electrode for producing oxygen by electrolyzing water, and preparation method and application thereof
  • Composite catalytic electrode for producing oxygen by electrolyzing water, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The nickel foam with a geometric area of ​​2 square centimeters was ultrasonically cleaned with deionized water, alcohol and acetone for 30 minutes in order to remove surface organic matter. Nickel foam was wrapped with tetrafluoroethylene tape, with an exposed area of ​​1 cm2, and immersed in 20 mL of an aqueous solution in which 320 mg of thioacetamide was dissolved. Then, the kettle was sealed and subjected to hydrothermal treatment at 180° C. for 4 hours to obtain nanorod nickel sulfide nanostructures with a length of 1 micron. After the hydrothermal kettle was cooled, the sample was rinsed with running water and dried at 60°C for 12 hours. The Ni(OH) 2 / Ni 3 S 2 / Ni's topography pictures are as follows Picture 1-1 and Figure 1-2 As shown, the crystal structure XRD result obtained by X-ray diffraction is as follows Figure 1-3 . Through the sulfidation reaction on the nickel surface, nickel sulfide (Ni 3 S 2 ) Nanorods grow vertically on nickel foam, with a ...

Embodiment 2

[0039] A flat nickel plate with a geometric area of ​​2 square centimeters was ultrasonically cleaned with deionized water, alcohol and acetone for 30 minutes in order to remove surface organic matter. Dip into 50 ml of an aqueous solution in which 500 mg of thioacetamide is dissolved. Then seal the pot, 180 ° C hydrothermal treatment for 4 hours to obtain Ni(OH) 2 / Ni 3 S 2 / Ni composite electrode. After the hydrothermal kettle was cooled, the sample was rinsed with flowing water and dried at 70°C for 12 hours to obtain Ni(OH) 2 / Ni 3 S 2 / Ni composite catalytic electrode. Nickel sulfide (Ni 3 S 2 ) Nanorods grow vertically on flat nickel, nickel hydroxide (Ni(OH) 2 ) thin layer covered with nickel sulfide (Ni 3 S 2 ) nanorod surface, the three constitute the Ni(OH) 2 / Ni 3 S 2 / Ni composite catalytic electrode. Nickel sulfide (Ni 3 S 2 ) Microscopic transmission electron microscope pictures of nanorods such as Figure 6 , Nickel sulfide rod-like morphology,...

Embodiment 3

[0042] A flat nickel plate with a geometric area of ​​2 square centimeters was ultrasonically cleaned with deionized water, alcohol and acetone for 30 minutes in order to remove surface organic matter. Nickel foam wrapped with tetrafluoroethylene tape, the exposed area is 1cm 2 , dipped into 20 ml of an aqueous solution in which 120 mg of thioacetamide was dissolved. Then seal the pot and heat treatment at 160°C for 2 hours to obtain Ni(OH) 2 / Ni 3 S 2 / Ni composite electrode. After the hydrothermal kettle was cooled, the samples were rinsed with running water and dried at 80°C for 16 hours. Obtained Ni(OH) 2 / Ni 3 S 2 / Ni composite electrode morphology as Figure 7 .

[0043] Electrochemical testing process is as described in embodiment 1, and test result is as follows: Ni(OH) 2 / Ni 3 S 2 / Ni composite electrode, at a current density of 10mA / cm 2 (0.1M KOH, 25°C), the overpotential is only 195mV, and the oxygen production efficiency is 1.4mmol / g h. After 1000 cy...

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Abstract

The invention discloses a composite catalytic electrode for producing oxygen by electrolyzing water, and a preparation method and application thereof. The electrode expression is Ni(OH)2 / Ni3S2 / Ni, wherein a Ni(OH)2 lamina is used as an outer layer coating layer, Ni3S2 nanoparticles are used as an active substance, and Ni foam is used as a conducting substrate. The preparation method comprises the following steps: carrying out ultrasonic cleaning on a metal nickel source sequentially with deionized water, alcohol and acetone; impregnating the pretreated metal nickel source in a sulfur source water solution, adding into a high-pressure autoclave, and carrying out hydrothermal reaction at 140-200 DEG C for 1-8 hours; and cooling, taking out the sulfurized metal nickel, rinsing with deionized water, and carrying out vacuum drying. The composite electrode for electrolyzing water has ultralow water electrolysis overpotential and high current density, obviously reduces the electric power consumption, and thus, has important application in the field of water electrolysis. Meanwhile, the composite electrode synthesis method is simple, has the advantage of low cost for raw materials and synthesis, and is suitable for application in water electrolysis industry.

Description

technical field [0001] The invention relates to a composite catalytic electrode for electrolyzing water; in particular, it relates to a high-efficiency electrolyzing water oxygen-producing catalytic electrode and its preparation method and application, belonging to the field of electrolyzing water catalysis. Background technique [0002] With the global consumption of non-renewable energy such as coal and oil, the future energy crisis is a problem that mankind must face. In the field of new energy, solar energy, wind energy, water energy and nuclear energy, as well as the derived electric energy, are the main energy sources in the future because they are clean, pollution-free and renewable. However, the storage and continuous supply of these new energy sources is a problem that must be solved, and converting them into chemical energy is a main way, such as electrolysis of water to produce hydrogen and oxygen. Significant efforts are required to study highly efficient oxygen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/04C25B11/06C25B1/04
CPCY02E60/366Y02E60/36
Inventor 周伟家刘宏王继扬张华
Owner ZIBO ANZE STANDARD GAS CO LTD
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