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Oxygen evolution electrode material containing FeOOH and preparation method thereof

A technology of oxygen evolution electrode and conductive agent, which is applied in the direction of electrodes, electrolysis process, electrolysis components, etc. It can solve the problems of high cost, large power consumption, high energy consumption of hydrogen production, etc., and achieve the effect of excellent performance, low price and pollution reduction

Inactive Publication Date: 2011-10-19
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since this method does not require high equipment investment but consumes a lot of electricity, 80% of the operating costs in this method are concentrated on electric energy.
Therefore, the energy conversion efficiency is low, the energy consumption of hydrogen production is high, and the cost is high. The wide application of water electrolysis hydrogen production technology is severely limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Place nickel foam in a solution containing 10 mmol FeSO 4 and 40mmol urea in an aqueous solution, heated to 90-130°C, reacted for 2-8 hours, and then dried at 60°C to obtain the FeOOH electrode material prepared in situ by foamed nickel, and the FeOOH loading capacity is 6.8mgcm -2 . With 1mol / L KOH as the electrolyte, the FeOOH prepared in situ by the nickel foam is used as the working electrode, the carbon rod is the counter electrode, Ag / AgCl, KCl sat As a reference electrode, electrochemical tests were performed. At a potential of 0.6V, the current density of the electrode is 47.2mA cm -2 .

Embodiment 2

[0018] 10mmol FeSO 4 , 40mmol urea, water, mix evenly, heat to 90-130°C, react for 2-8 hours to get FeOOH. An oxygen evolution electrode prepared by using FeOOH obtained by the method as an active material, polytetrafluoroethylene emulsion as a binder, activated carbon as a conductive agent, and nickel foam as a matrix. Among them, m(FeOOH):m(activated carbon):m(polytetrafluoroethylene)≈30:3:1, and the loading capacity of FeOOH is 20mg cm -2 . With 1mol / L KOH as the electrolyte, the electrode is the working electrode, the carbon rod is the counter electrode, Ag / AgCl, KCl sat As a reference electrode, electrochemical tests were performed. At a potential of 0.6V, the current density of the electrode is 51.17mA cm -2 .

Embodiment 3

[0020] 0.946g FeCl 3 ·6H 2 O, 0.479g Na 2 SO 4 , water, after mixing evenly, place in a reaction kettle and heat to 100-200°C, and react for 2-8 hours to synthesize FeOOH. The FeOOH obtained by this method is used as an active material, polytetrafluoroethylene emulsion as a binding agent, activated carbon as a conductive agent, and nickel foam as a substrate for oxygen evolution electrodes, wherein m (FeOOH): m (activated carbon): m (polytetrafluoroethylene Vinyl fluoride) ≈ 30:3:1, the loading of FeOOH is 20mg cm -2 . Use 1mol / L KOH as the electrolyte, the electrode as the working electrode, the carbon rod as the counter electrode, Ag / AgCl, and saturated KCl as the reference electrode, respectively, at 1mA cm -2 , 5mA cm -2 , 10mA cm -2 、20mA cm -2 、40mA cm -2 The constant current test was carried out on the FeOOH electrode for 2 hours each, and the voltage was stable without fluctuation during the test time of 10 hours. Prove that the electrode performance is stabl...

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Abstract

The present invention provides an oxygen evolution electrode material containing FeOOH and a preparation method thereof. The oxygen evolution electrode material containing FeOOH is composed of metal nickel and FeOOH. The preparation method comprises the following steps of: preparing FeOOH by using a chemical precipitation method, a hydrothermal method, an electrodeposition method, a plasma chemical deposition method, a ferrous oxidation method or a forced hydrolysis method; and compounding metal nickel and FeOOH to obtain the oxygen evolution electrode. The invention has the advantages that: FeOOH is used as an oxygen evolution electrode and has excellent performance; FeOOH is inexpensive and widely available; the electrode is easy to prepare, can be prepared by a method for industrial preparation of DSA (dimensionally stable anode), and has strong practicality; and Fe is environmentally-friendly, thus reducing the environmental pollution caused by cobalt oxides.

Description

technical field [0001] The invention relates to an oxygen evolution electrode material, specifically a nickel-based FeOOH electrode material. The invention also relates to a preparation method of an oxygen evolution electrode material containing FeOOH. Background technique [0002] Hydrogen production by electrolysis of alkaline water is a common and mature method for producing hydrogen. Since this method does not require high equipment investment but consumes a lot of electricity, 80% of the operating cost in this method is concentrated on electric energy. Therefore, the energy conversion efficiency is low, the energy consumption of hydrogen production is high, and the cost is high. The wide application of water electrolysis hydrogen production technology is severely limited. The study found that in the process of water electrolysis for hydrogen production, a considerable part of energy is consumed in the polarization of the anode surface to generate oxygen evolution over...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B1/04
CPCY02E60/36
Inventor 卢帮安曹殿学王贵领
Owner HARBIN ENG UNIV
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