Cobaltosic oxide array/titanium mesh water decomposition oxygen production electrode and preparation method thereof

A nano-technology of cobalt tetroxide and nano-cobalt oxide is applied in the direction of electrodes, electrolysis components, electrolysis process, etc., which can solve the problems of difficult reuse of supporting materials, poor mechanical properties of carbon cloth and carbon paper, and difficult industrial application of materials, etc. Achieve the effects of easy scale-up production, reduced electron transport resistance, good activity and stability

Pending Publication Date: 2020-04-21
TOYOTA JIDOSHA KK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned supporting materials have poor acid and alkali resistance, for example, nickel mesh will dissolve in acidic system
The mechanical properties of carbon cloth and carbon paper

Method used

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  • Cobaltosic oxide array/titanium mesh water decomposition oxygen production electrode and preparation method thereof
  • Cobaltosic oxide array/titanium mesh water decomposition oxygen production electrode and preparation method thereof
  • Cobaltosic oxide array/titanium mesh water decomposition oxygen production electrode and preparation method thereof

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preparation example Construction

[0019] The preparation method of the cobalt trioxide nanobeam array / titanium mesh electrode of the present invention comprises the following process steps:

[0020] Use cobalt salt, ammonium fluoride and urea as raw materials, add water as a reaction solvent, mix evenly and add titanium mesh into the hydrothermal reaction kettle, control the hydrothermal reaction temperature range 90-200 ° C, time 1-50 Hours, high-temperature calcination temperature of 300-500 DEG C, reduction treatment time of 5-60 minutes in a reducing agent, to obtain tricobalt tetraoxide nanobeam array / titanium mesh composite oxygen production electrode.

[0021] Wherein the cobalt salt is selected from cobalt chloride, cobalt bromide, cobalt fluoride, cobalt acetate, cobalt nitrate, cobalt sulfate and cobalt carbonate. Ammonium fluoride acts as a structure-directing agent in the hydrothermal reaction, and urea is hydrolyzed in the reaction to produce CO 3 2- and OH - , to promote the formation of cobal...

Embodiment 1

[0029] The molar weight is respectively the cobalt chloride of 1.5mmol, 7.5mmol, 4mmol, the mixed precursor of urea, ammonium fluoride and 25mL deionized water is placed in 50 milliliters of reaction kettles, and the titanium mesh ( 80 mesh) was placed in the kettle, and the reaction kettle was heated to 120°C in an oven, reacted for 4 hours, and finally cooled naturally to obtain a basic cobalt carbonate / titanium mesh electrode. Put the basic cobalt carbonate / titanium mesh electrode in a muffle furnace at 350°C, react for 2 hours, soak the calcined electrode in a hydrazine hydrate solution (aqueous solution, the same below, the concentration is 80wt%) for 20 minutes, wash and dry to obtain tricobalt tetroxide Nanobeam array / titanium mesh oxygen generation electrode.

[0030] The growth amount of the obtained cobalt trioxide nanobeam array is 0.843mg / cm 2 Titanium mesh, and the length of the cobalt tetraoxide nano-beam array is 4-5 μm, and the nano-beam size (average diameter) ...

Embodiment 2

[0032] The molar weight is respectively the cobalt chloride of 1.5mmol, 7.5mmol, 4mmol, the mixed precursor of urea, ammonium fluoride and 25mL deionized water is placed in 50 milliliters of reaction kettles, and the titanium mesh ( 80 mesh) was placed in the kettle, and the reaction kettle was heated to 120°C in an oven, reacted for 4 hours, and finally cooled naturally to obtain a basic cobalt carbonate / titanium mesh electrode. Place the basic cobalt carbonate / titanium mesh electrode in a muffle furnace at 350°C, react for 2 hours, soak the calcined electrode in hydrazine hydrate solution (80wt%) for 10 minutes, wash and dry to obtain cobalt trioxide nanobeam array / titanium mesh oxygen electrode.

[0033] The growth amount of the obtained cobalt trioxide nanobeam array is 0.843mg / cm 2 Titanium mesh, and the length of the cobalt tetraoxide nanobeam array is 4-5 μm and the size of the nanobeam is 300nm as observed by the microscope.

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Abstract

The invention relates to a cobaltosic oxide nano-beam array/titanium mesh electrode which is used as an anode reaction of water decomposition and comprises a titanium mesh and a cobaltosic oxide nano-beam array growing on mesh wires. The preparation process of the electrode comprises the following steps: growing a precursor basic carbonate of cobaltosic oxide on a titanium mesh by a hydrothermal method, calcining the precursor, and treating the electrode by using a reducing agent to obtain the cobaltosic oxide nano-beam array/titanium mesh electrode. The electrode has high oxygen production catalytic activity and cycling stability, the preparation process is simple to operate, green, safe and low in cost, and large-scale continuous production can be realized. The product has wide potentialapplication in the aspects of electrochemical water decomposition, green energy conversion and storage and the like.

Description

technical field [0001] The invention belongs to the field of electrocatalytic water splitting by transition metal oxides, in particular to a cobalt trioxide array / titanium mesh water splitting oxygen production electrode and a preparation method thereof. Background technique [0002] In recent decades, with the increasing use of fossil energy (such as coal and petroleum) and the inevitable serious environmental pollution in the use of the above-mentioned energy, it has affected the world's energy security and human survival and development. Searching for environmentally friendly and renewable green and safe energy has become a hot spot in the research of emerging energy at home and abroad. Solar energy is an inexhaustible source of energy. The conversion and utilization of solar energy has become the focus of scientific research in recent decades. With the rapid development of technologies such as solar photovoltaic power generation and perovskite solar cells, it is becomi...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B11/06C25B11/10C23C18/12B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C23C18/1204C23C18/1241C25B1/04C25B11/051C25B11/057C25B11/077Y02E60/36
Inventor 李新昊张军军陈接胜野田克敏原山贵司后藤哲
Owner TOYOTA JIDOSHA KK
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