Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation and application of a porous composite electrocatalyst based on bimetallic macrocycles

A technology of porous composite materials and macrocyclic compounds, which can be used in circuits, electrical components, battery electrodes, etc., and can solve the problems of complex preparation process and difficult large-scale application.

Active Publication Date: 2021-05-04
DALIAN UNIV OF TECH
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of MOFs materials is relatively complicated, and mostly requires high temperature and high pressure conditions, making it difficult to apply on a large scale.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation and application of a porous composite electrocatalyst based on bimetallic macrocycles
  • Preparation and application of a porous composite electrocatalyst based on bimetallic macrocycles
  • Preparation and application of a porous composite electrocatalyst based on bimetallic macrocycles

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.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the field of fuel cell electrocatalysts, and provides a preparation method and application of a porous composite material containing a bimetallic macrocyclic compound used as an oxygen reduction electrocatalyst. A simple solution reaction is used to stir the transition metal salt, nitrogen-containing organic ligand and metal macrocyclic compound at a certain ratio at 0-80°C, and react for a certain period of time, so that the metal macrocyclic compound is embedded in the metal salt and the organic ligand to form In the pores, as a precursor material, the final catalyst is obtained through high-temperature heat treatment. The material has a high porosity and is embedded with a metal macrocyclic compound, which significantly increases the active site density and avoids particle agglomeration and pore collapse during high-temperature pyrolysis. Compared with conventional non-noble metal electrocatalysts, this material exhibits higher catalytic activity for oxygen reduction under both 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90
CPCH01M4/9041H01M4/9083Y02E60/50
Inventor 宋玉江郑若楠翟梓会
Owner DALIAN UNIV OF TECH