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Biomass carbon/cobalt-iron double metal oxide bifunctional oxygen catalyst and its preparation method and application

A bimetallic oxide and biomass carbon technology, applied in structural parts, electrical components, battery electrodes, etc., to achieve the effects of low price, low preparation cost, and good methanol tolerance

Active Publication Date: 2018-01-09
徐州圣都金属科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation of C / LDO catalyst by this method and the application of this catalyst in alkaline electrolysis water anode OER and fuel cell cathode ORR have not been reported yet.

Method used

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  • Biomass carbon/cobalt-iron double metal oxide bifunctional oxygen catalyst and its preparation method and application
  • Biomass carbon/cobalt-iron double metal oxide bifunctional oxygen catalyst and its preparation method and application
  • Biomass carbon/cobalt-iron double metal oxide bifunctional oxygen catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (a) Preparation of SA / LDH complex

[0032] Disperse a certain amount of SA in distilled water to make the concentration 2.5mg / ml, add cobalt chloride hexahydrate and ferric chloride hexahydrate into 150mL deionized water at a molar ratio of 3:1, so that the total concentration of metal ions is 0.016mol / L, stir and dissolve completely, then slowly add it dropwise into the SA solution, stir for 4h and then centrifuge at 3800rpm for 10min, collect the precipitate and redisperse it in 150mL deionized water, then add 1.5mol / L NaOH dropwise at a constant speed, adjust the pH of the reaction solution to 8. Transfer the above mixed solution into a reaction kettle, conduct a hydrothermal reaction at 130°C for 24 hours, wash the reaction solution three times with deionized water and ethanol in turn after centrifugation, and dry it to form the SA / LDH complex;

[0033] (b) Preparation of C / LDO bifunctional oxygen catalyst

[0034] Grind the SA / LDH composite obtained in step (a) i...

Embodiment 2

[0036] (a) Preparation of SA / LDH complexes

[0037] Disperse a certain amount of SA in distilled water to make its concentration 5mg / ml, and add cobalt chloride hexahydrate and ferric chloride hexahydrate into 150mL deionized water in a molar ratio of 3:1, so that the total concentration of metal ions is 0.016mol / L, slowly add dropwise to the SA solution after stirring to dissolve completely, stir for 4h, centrifuge at 3800rpm for 10min, collect the precipitate and re-disperse it in 150mL deionized water, then dropwise add 1.5mol / L NaOH at a uniform speed to adjust the pH of the reaction solution to 8, The above mixed solution was transferred to the reaction kettle, and hydrothermally reacted at 130°C for 24 hours. After centrifugation, the reaction solution was washed three times with deionized water and ethanol in turn, and the SA / LDH complex was obtained after drying;

[0038] (b) Preparation of C / LDO catalyst

[0039] Prepared according to the method and conditions of st...

Embodiment 3

[0042] (a) Preparation of SA / LDH complexes

[0043] Disperse a certain amount of SA in distilled water to make its concentration 10mg / ml, and add cobalt chloride hexahydrate and ferric chloride hexahydrate into 150mL deionized water at a molar ratio of 3:1, so that the total concentration of metal ions is 0.016mol / L, slowly add dropwise to SA solution after stirring to dissolve completely, centrifuge at 3800rpm for 10min after stirring for 4h, collect the precipitate and redisperse it in 150mL deionized water, and then dropwise add 1.5mol / L NaOH at a uniform speed to adjust the pH of the reaction solution to 8 , the above mixed solution was transferred into the reaction kettle, hydrothermally reacted at 130 ° C for 24 hours, the reaction solution was centrifuged and washed with deionized water and ethanol three times in turn, and it was the SA / LDH complex after drying;

[0044] (b) Preparation of C / LDO catalyst

[0045] Prepared according to the method and conditions of step...

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Abstract

The invention provides a biomass carbon / ferrocobalt dual-metal-oxide double-functional oxide catalyst as well as a preparation method and application thereof. The catalyst takes sodium alginate as a template; metal ions are firstly captured on sodium alginate molecules and a sodium alginate / ferrocobalt type hydrotalcite compound is prepared under an alkaline condition; and then the biomass carbon / ferrocobalt dual-metal-oxide double-functional oxide catalyst is prepared through high-temperature calcining. In the oxide catalyst provided by the invention, double metal oxides exist in the forms of CoO, Co3O4, FeO and Fe2O3, and less monomer Co is included. Therefore, the catalyst has high oxygen evolution (OER) and oxygen reduction (ORR) catalytic activities, good stability and excellent methanol tolerance under the alkaline condition; and the catalyst has the advantages of low cost of the used raw materials, simple preparation method, easiness in operation and convenience for large-scale production.

Description

Technical field: [0001] The invention belongs to the field of new energy material technology and electrochemical catalysis, and specifically relates to a biomass carbon / cobalt-iron bimetallic oxide bifunctional oxygen catalyst; it also relates to a preparation method of the catalyst and its oxygen evolution reaction at the anode of alkaline electrolyzed water and Electrocatalytic applications in fuel cell cathode oxygen reduction reactions. Background technique: [0002] With the increasing demand for clean and sustainable energy, scientists have devoted a lot of energy to the research and development of efficient, low-cost and environmentally friendly energy conversion and storage systems. Among them, the oxygen reduction reaction (ORR) is a ubiquitous cathodic reaction in fuel cells and metal-air batteries, and the oxygen evolution reaction (OER) plays an important role in solar fuel synthesis and water splitting energy storage systems. Therefore, catalysts, especially ox...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/88
CPCH01M4/88H01M4/9008Y02E60/50
Inventor 詹天荣王志伟张晓刘晓林芦思思
Owner 徐州圣都金属科技有限公司
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