High efficiency water splitting oxygen electrode suitable for natural water and preparation method

A natural water body, oxygen electrode technology, applied in the direction of electrodes, electrode shapes/types, electrolytic components, etc., can solve the problems of high-efficiency and high-stable water splitting oxygen electrodes, etc., to achieve easy large-scale synthesis, high current density, and avoid side effects The effect of the reaction

Active Publication Date: 2015-12-23
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a high-efficiency water-splitting oxygen electrode suitable for natural water bodies and its preparation method, which solves the problem of lack of high

Method used

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  • High efficiency water splitting oxygen electrode suitable for natural water and preparation method
  • High efficiency water splitting oxygen electrode suitable for natural water and preparation method
  • High efficiency water splitting oxygen electrode suitable for natural water and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Cobalt-iron hydrotalcite-conductive carbon black composite / titanium mesh water-splitting oxygen electrode for catalytic oxygen evolution in natural Bohai Sea water

[0023] (1) Preparation of cobalt-iron hydrotalcite active material: weigh 11.636g Co(NO 3 ) 2 ·6H 2 O, pipette 8.076gFe (NO 3 ) 3 9H 2 O was dissolved in 100mL deionized water to make a mixed salt solution; then weighed 3.84gNaOH and 4.24gNaOH 2 CO 3 Dissolve in 100mL deionized water to make a mixed alkali solution; pour the above two solutions into a fully back-mixed rotary liquid film reactor and react for 2min at the same time, and the resulting slurry is crystallized in a water bath at 60°C for 12h to obtain a cobalt-iron hydrotalcite slurry, centrifuged Wash to pH = 7.5, dry at 80°C for 12 hours, and grind to obtain hydrotalcite nanoparticle powder, its XRD spectrum is as follows figure 1 As shown, the appearance of characteristic diffraction peaks such as (003), (006), and (012) indicates the g...

Embodiment 2

[0029] Cobalt-iron hydrotalcite-conductive carbon black composite / titanium mesh water-splitting oxygen electrode for catalytic oxygen evolution in artificial seawater

[0030] (1) Preparation of cobalt-iron hydrotalcite active material: weigh 17.454g Co(NO 3 ) 2 ·6H 2 O, pipette 8.076gFe (NO 3 ) 3 9H 2 O was dissolved in 100mL deionized water to make a mixed salt solution; then weighed 4.62gNaOH and 4.83gNaOH 2 CO 3 Dissolve in 100mL deionized water to make a mixed alkali solution; pour the above two solutions into a fully back-mixed rotary liquid film reactor and react for 2 minutes, and the resulting slurry is crystallized in a water bath at 50°C for 10 hours to obtain a cobalt-iron hydrotalcite slurry, centrifuged Wash to pH = 8, dry at 70° C. for 16 hours, and grind to obtain hydrotalcite nanoparticle powder.

[0031] (2) With the cobalt-iron hydrotalcite obtained in step (1) as the active material, after mixing CoFeLDH and conductive agent carbon black (VulcanXC-72...

Embodiment 3

[0035] Cobalt-iron hydrotalcite-conductive carbon black composite / titanium mesh water-splitting oxygen electrode for catalytic oxygen evolution in neutral sodium chloride solution

[0036] (1) Preparation of cobalt-iron hydrotalcite active material: weigh 14.16g Co(NO 3 ) 2 ·6H 2 O, pipette 9.11gFe (NO 3 ) 3 9H 2 O was dissolved in 100mL deionized water to make a mixed salt solution; then weighed 3.96gNaOH and 4.24gNaOH 2 CO 3 Dissolve in 100mL deionized water to make a mixed alkali solution; pour the above two solutions into a fully back-mixed rotating liquid film reactor at the same time and react for 1.5min, and the resulting slurry is crystallized in a water bath at 55°C for 5h to obtain a cobalt iron hydrotalcite slurry Centrifugal washing to pH = 7.5, drying at 60° C. for 24 hours, and grinding to obtain hydrotalcite nanoparticle powder.

[0037] (2) With the cobalt-iron hydrotalcite obtained in step (1) as the active material, after mixing CoFeLDH and conductive ...

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Abstract

Belonging to the field of water splitting new energy technologies, the invention provides a high efficiency water splitting oxygen electrode suitable for natural water and a preparation method. In the electrode, Co-Fe hydrotalcite has a mass percentage content of 3-5%, a particle diameter of 50-00 nm, and a specific surface area of 30-50m<2>/g; the used conductive carbon black is Vulcan XC-72 type, and has a mass percentage content of 7-16%; the used titanium mesh is a plain titanium mesh with equal warp and weft wire diameter density, has a thickness of 0.2-0.5mm and a mass percentage of 79%-90%. According to the preparation method, the Co-Fe hydrotalcite, carbon black and a metal titanium mesh substrate for loading are integrated into the composite electrode. The electrode can carry a simple three-electrode system to be used for oxygen evolution reaction in natural water and neutral non-buffer solutions, including natural seawater and neutral sodium chloride solutions, etc. The preparation method is simple and is easy to realize industrial production, and has no side reaction influence.

Description

technical field [0001] The invention belongs to the technical field of water splitting new energy, and in particular relates to a high-efficiency water splitting oxygen electrode suitable for natural water bodies and a preparation method. Background technique [0002] The current energy shortage and environmental pollution have made the energy problem a bottleneck restricting the economic development of our country and even the world. As a substitute for fossil energy, hydrogen energy, a renewable energy source, has attracted more and more attention from all over the world. Hydrogen production by electrolysis of water is the most economical and environmentally friendly way, but many researchers have found that oxygen precipitation will be accompanied by an increase in the overpotential of the anode, and excessive energy consumption will greatly increase the economic cost of hydrogen production by electrolysis of water. In order to reduce the oxygen evolution overpotential an...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B11/03C25B11/10
CPCY02E60/36
Inventor 陈旭童哲源杨文胜
Owner BEIJING UNIV OF CHEM TECH
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