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Biomass carbon/ferrocobalt dual-metal-oxide double-functional oxide catalyst as well as preparation method and application thereof

A bimetallic oxide, biomass carbon technology, applied in structural parts, electrical components, battery electrodes, etc., to achieve good OER and ORR catalytic activity, good methanol tolerance, and improved electrical conductivity.

Active Publication Date: 2016-05-25
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/ferrocobalt dual-metal-oxide double-functional oxide catalyst as well as preparation method and application thereof
  • Biomass carbon/ferrocobalt dual-metal-oxide double-functional oxide catalyst as well as preparation method and application thereof
  • Biomass carbon/ferrocobalt dual-metal-oxide double-functional oxide catalyst as well as preparation method and application thereof

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 drop 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 to adjust the pH of the reaction solution to 8 Left and right, transfer the above mixed solution into a reaction kettle, and conduct a hydrothermal reaction at 130°C for 24 hours. After the reaction solution is centrifuged, it is washed three times with deionized water and ethanol in sequence, and the SA / LDH complex is obtained after drying;

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

[0034]Grind the SA / LDH ...

Embodiment 2

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

[0037] Disperse a certain amount of SA in distilled water to make the concentration 5mg / ml, add cobalt chloride hexahydrate and ferric chloride hexahydrate in 150mL deionized water at a molar ratio of 3:1, so that the total concentration of metal ions is 0.016mol / ml L, stirred and dissolved completely, slowly added dropwise to the SA solution, stirred for 4 hours, centrifuged at 3800rpm for 10 minutes, collected the precipitate and redispersed it in 150mL deionized water, then added 1.5mol / L NaOH dropwise at a constant speed, and adjusted the pH of the reaction solution to about 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 successively after centrifugation, and dry it to obtain the SA / LDH complex;

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

[0039] Prepare according to the method and conditio...

Embodiment 3

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

[0043] Disperse a certain amount of SA in distilled water to make the concentration 10mg / 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 / ml L, stirred and dissolved completely, slowly added dropwise to the SA solution, stirred for 4 hours, centrifuged at 3800rpm for 10 minutes, collected the precipitate and redispersed it in 150mL deionized water, then added 1.5mol / L NaOH dropwise at a constant speed, and adjusted the pH of the reaction solution to about 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 successively after centrifugation, and dry it to obtain the SA / LDH complex;

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

[0045] Prepare according to the method and condi...

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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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IPC IPC(8): H01M4/90H01M4/88
CPCH01M4/88H01M4/9008Y02E60/50
Inventor 詹天荣刘晓林芦思思
Owner 徐州圣都金属科技有限公司
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