Bifunctional catalyst for catalyzing ORR and OER and preparation and application of bifunctional catalyst

A bifunctional catalyst and catalyst technology, applied in the direction of nanotechnology for materials and surface science, fuel cell half-cells and primary battery half-cells, electrical components, etc., can solve the scarcity of resources and the high cost of noble metal catalysts , cannot be commercialized on a large scale, and achieve the effect of solving high cost and high catalytic activity

Inactive Publication Date: 2019-08-20
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a bifunctional catalyst for catalyzing ORR and OER and its preparation and applic

Method used

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  • Bifunctional catalyst for catalyzing ORR and OER and preparation and application of bifunctional catalyst
  • Bifunctional catalyst for catalyzing ORR and OER and preparation and application of bifunctional catalyst
  • Bifunctional catalyst for catalyzing ORR and OER and preparation and application of bifunctional catalyst

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Embodiment 1

[0043] A method for preparing a nitrogen-doped MOF-based dual-function air catalyst in which binary metals work together in an embodiment of the present invention comprises the following steps:

[0044] Step 1, solvothermal reaction: different amounts of Zn containing metal ions 2+ 、Co 2+ and Fe 3+ The nitrate is dispersed in methanol, and a certain amount of dimethylimidazole is also dispersed in methanol, where Zn 2+ The molar concentration is 0.038mol / L (3.39gZn(NO 3 ) 2 ·6H 2 O dissolved in 300mL methanol), the concentration of dimethylimidazole is an equal volume of Zn 2+ 4 times the molar concentration of Fe 3+ and Co 2+ The molar concentrations are 3% times the Zn 2+ (same as Zn 2+ Disperse in methanol together); mix the uniformly dispersed reactant solutions together, stir for 5 minutes, and stand in a 60° oven for 24 hours, and cool to room temperature naturally after the reaction is complete; centrifugally wash the obtained white precursor solid And drying:...

Embodiment 2

[0047] The preparation method of the embodiment of the present invention, the difference with embodiment 1 only lies in: Fe 3+ The molar concentration is 3% times, Co 2+ The molar concentration is 6% times the Zn 2+ ; Others are identical to Example 1.

Embodiment 3

[0049] The preparation method of the embodiment of the present invention, the difference with embodiment 1 only lies in: Fe 3+ The molar concentration is 3% times, Co 2+ The molar concentration is 9% times the Zn 2+ ; Others are identical to Example 1.

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Abstract

The invention discloses a bifunctional catalyst for catalyzing ORR and OER and preparation and application of the bifunctional catalyst. The bifunctional catalyst is a nitrogen-doped MOF bifunctionalair catalyst under the combined action of binary metal, wherein the binary metal is Fe and Co. The MOF bifunctional air catalyst is nano-particles with a regular dodecahedron structure, so that the cost can be greatly reduced, and large-scale popularization and application can be realized. The method disclosed by the invention is realized by preparing a precursor through a constant-temperature solvothermal reaction, centrifugally washing and purifying the precursor and carbonizing at a high temperature to obtain the catalyst, and is simple to operate and easy to control. Cheap and basically harmless chemicals such as metal nitrate are selected as raw materials in the preparation process, the obtained precursor purifying and drying method is simple, convenient and low in time consumption, ametal organic compound required for preparing a catalyst with a special structure is avoided, and the cost can be further reduced.

Description

technical field [0001] The invention belongs to the technical field of zinc-air batteries, and relates to a catalyst and preparation of an air electrode of a zinc-air battery, in particular to a bifunctional catalyst for catalyzing ORR and OER, and its preparation and application. Background technique [0002] Problems such as environmental pollution, resource shortage, and greenhouse effect caused by the extensive use of traditional fossil energy have become increasingly prominent, and have become major issues facing the development of human society. The development of new and efficient green new energy has become a research and development hotspot in the field of energy at home and abroad. Zinc-air battery (metal zinc as anode and oxygen as cathode) is a rechargeable new technology fuel cell for clean and efficient conversion and storage of energy, with stable performance and high theoretical energy density (1084Wh g -1 ), completely pollution-free, environmentally friend...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M12/06B82Y30/00
CPCB82Y30/00H01M4/9041H01M12/06
Inventor 谭强何玉婷翟文芳柳永宁
Owner XI AN JIAOTONG UNIV
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