Preparation and application of porous composite material electrocatalyst based on bimetallic macrocyclic compound

A technology of porous composite materials and macrocyclic compounds, applied in circuits, electrical components, battery electrodes, etc., can solve problems such as difficult large-scale application and complicated preparation process, achieve mild material synthesis conditions, simplify the preparation process, and reduce particle agglomeration Effect

Active Publication Date: 2020-05-12
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation process of MOFs materials is relatively complicated, and mostly req...

Method used

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  • Preparation and application of porous composite material electrocatalyst based on bimetallic macrocyclic compound
  • Preparation and application of porous composite material electrocatalyst based on bimetallic macrocyclic compound
  • Preparation and application of porous composite material electrocatalyst based on bimetallic macrocyclic compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] At room temperature (25°C), prepare 10mL of 10mM 2-methylimidazole aqueous solution and ultrasonically homogenize; prepare 10mL of 2.5mM zinc acetate aqueous solution and ultrasonically homogenize; dissolve 2mL containing 22.5mg porphyrin iron and 7.5mg porphyrin cobalt in In 2mL of N,N-dimethylformamide (DMF) solution, ultrasonically uniform;

[0048] Pour 2 mL of N,N-dimethylformamide (DMF) solution containing 22.5 mg of porphyrin iron and 7.5 mg of porphyrin cobalt into 10 mL of 10 mM 2-methylimidazole aqueous solution, sonicate for 15 min, and then add 10 mL of 2.5 mM The zinc acetate aqueous solution was poured into the above-mentioned mixed solution which was continuously stirred, reacted at normal pressure for 8 hours, suction filtered, and dried; the dried sample was ground to obtain a metal macrocyclic compound and an organic porous composite material, and the composite material was placed in a tube furnace in argon atmosphere, heat up to 900°C at a rate of 2-1...

Embodiment 2

[0052] (different from metal macrocyclic compound porphyrin iron and porphyrin cobalt ratio in embodiment 1, other steps are identical):

[0053] At room temperature (25°C), pour 2 mL of N,N-dimethylformamide (DMF) solution containing 20 mg of porphyrin iron and 10 mg of porphyrin cobalt into 10 mL of 10 mM 2-methylimidazole aqueous solution, and sonicate for 15 min. Then pour 10mL of 2.5mM zinc acetate aqueous solution into the above-mentioned mixed solution under constant stirring, react at normal pressure for 8h, filter with suction, and dry. Then heat treatment at 900° C. for 2 hours under an argon atmosphere to obtain an electrocatalyst Fe:Co=2:1-900° C.

Embodiment 3-4

[0055] In the preparation method, the ratio of the metal macrocyclic compound porphyrin iron and porphyrin cobalt is different from that in Example 1, and the other steps are the same to obtain the electrocatalyst Fe:Co=1:1, Fe:Co=4:1.

[0056] like figure 2 As shown in a and b, when Fe:Co=1:1, Fe:Co=2:1, Fe:Co=3:1, Fe:Co=4:1, no matter in acidic or alkaline environment, the catalyst Both have high half-wave potentials.

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Abstract

The invention belongs to the field of fuel cell electrocatalysts, and provides a preparation method and application of a porous composite material electrocatalyst based on bimetallic macrocyclic compound. The method comprises the steps of: stirring transition metal salt, a nitrogen-containing organic ligand and a metal macrocyclic compound according to a certain proportion at the temperature of 0-80 DEG C by adopting simple solution reaction and performing reaction for a certain period of time, so that the metal macrocyclic compound is embedded into a pore channel formed by the metal salt andthe organic ligand to serve as a precursor material, and the final catalyst is obtained through high-temperature heat treatment. The material is high in porosity, the metal macrocyclic compound is embedded, the active site density is remarkably improved, and particle aggregation and hole collapse in the high-temperature pyrolysis process are avoided. Compared with the traditional non-noble metal electrocatalyst, the material has higher oxygen reduction catalytic activity under acidic and alkaline conditions.

Description

technical field [0001] The invention belongs to the field of fuel cell electrocatalysts, and in particular relates to the preparation and application of a porous composite electrocatalyst containing bimetallic macrocyclic compounds. Background technique [0002] With the rapid development of the world economy, traditional fossil fuels such as coal, oil, and natural gas are facing shortages and causing serious environmental problems. Future energy will definitely develop in a clean, efficient, pollution-free, and sustainable direction. As a device that can directly convert chemical energy into electrical energy, fuel cells are widely used. Among them, the emerging automobile industry powered by polymer electrolyte membrane fuel cells is environmentally friendly, high energy conversion efficiency, high power density, and operation. Advantages such as low noise are on the eve of large-scale commercialization, but it is still a big challenge to fully replace traditional fuel veh...

Claims

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Application Information

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IPC IPC(8): H01M4/90
CPCH01M4/9041H01M4/9083Y02E60/50
Inventor 宋玉江郑若楠翟梓会
Owner DALIAN UNIV OF TECH
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