Porphyrin zeolite imidazole framework hybrid electrocatalyst and preparation method and application thereof

A technology of porphyrin zeolite imidazole and electrocatalyst, which is applied in circuits, electrical components, battery electrodes, etc., to achieve the effects of high specific surface area, aerobic reduction activity, and structure collapse prevention

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

[0005] So far, there have been no related patent reports on the synthesis of porphyrin ZIF-8 hybrid materials ba

Method used

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  • Porphyrin zeolite imidazole framework hybrid electrocatalyst and preparation method and application thereof
  • Porphyrin zeolite imidazole framework hybrid electrocatalyst and preparation method and application thereof
  • Porphyrin zeolite imidazole framework hybrid electrocatalyst and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0031] At 40°C, add 100 mg of hematin to 50 mL of 2M 2-methylimidazole aqueous solution, and ultrasonically homogenize to obtain solution A, then add 50 mL of 0.5 M zinc acetate aqueous solution to continuously stirring solution A, and continue stirring for 1 h , the obtained green precipitate was suction-filtered, dried in an oven at 65°C, and ground into a green powder;

[0032] 500 mg of green powder was heat-treated at 900 °C for 2 h under an argon atmosphere to obtain a Hemin@ZIF-8-900 hybrid electrocatalyst.

[0033] Depend on figure 1 Therefore, the hybrid electrocatalyst of hemin and ZIF-8 is an amorphous carbon structure without any metal-based nanoparticles that are not conducive to oxygen reduction activity and stability, which proves that the method of this embodiment helps to avoid the high temperature of metal particles Aggregation increases the density of oxygen reduction active sites.

[0034] Depend on figure 2 Obtained, after introducing Hemin molecule i...

Embodiment 2

[0038] At 25°C, add 100 mg of meso-tetrakis(4-benzenesulfonate) porphyrin cobalt to 10 mL of 0.4 M 2-methylimidazole aqueous solution, and ultrasonically homogenize to obtain solution A, then add 10 mL of 0.1 M zinc acetate aqueous solution Add it into solution A which is constantly stirring, continue to stir for 1 hour, filter the obtained green precipitate with suction, dry it in an oven at 65°C, and grind it into a green powder;

[0039] Take 200mg of green powder and heat-treat at 900°C for 2h under argon atmosphere to obtain CoTPPS 4 @ZIF-8-900 hybrid electrocatalyst.

Embodiment 3

[0041] At 40°C, add 20 mg of protoporphyrin cobalt chloride to 10 mL of 0.8 M 2-methylimidazole aqueous solution, and ultrasonically homogenize to obtain solution A, then add 10 mL of 0.2 M zinc acetate aqueous solution to solution A that is constantly stirring , continue to stir for 4 hours, filter the obtained green precipitate with suction, dry it in an oven at 65°C, and grind it into a green powder;

[0042] 100 mg of the green powder was heat-treated at 800 °C for 2 h under an argon atmosphere to obtain a CoP@ZIF-8-800 hybrid electrocatalyst.

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Abstract

The invention relates to a porphyrin zeolite imidazole framework hybrid electrocatalyst and a preparation method and application thereof, and belongs to the technical field of polymer electrolyte membrane fuel cells. The preparation method comprises the following steps: 1) dissolving porphyrin into an aqueous solution of 2-methylimidazole to obtain a solution A, adding a zinc acetate solution intothe solution A to obtain green precipitates, and carrying out solid-liquid separation, performing drying and grinding to obtain green powder; and 2) carrying out heat treatment on the product obtained in the step 1) at 500-900 DEG C in an inert gas atmosphere for 2h to obtain the non-noble metal electrocatalyst. The porphyrin zeolite imidazole framework hybrid electrocatalyst and the preparationmethod and application thereof have the advantages of the low raw material cost, the simple method, short time consumption, realization of reaction at room temperature, easiness in scale-up synthesis,environmental protection, and avoiding of the use of an organic solvent.

Description

technical field [0001] The invention relates to a porphyrin zeolite imidazole framework hybrid electrocatalyst and a preparation method and application thereof, belonging to the technical field of polymer electrolyte membrane fuel cells. Background technique [0002] Polymer electrolyte membrane fuel cell is an efficient and clean energy conversion device. At present, its cathodic oxygen reduction reaction still cannot get rid of the use of platinum-based noble metal electrocatalysts, and its large-scale commercial application has not yet been fully realized. Therefore, the study of low-cost, high-activity, and high-stability non-noble metal electrocatalysts has always been an important topic for researchers. Among the many kinds of non-noble metal electrocatalysts, electrocatalysts derived from porphyrins and metal-organic frameworks (MOFs) precursors have high oxygen reduction activity due to the intrinsic metal-nitrogen active center, while Widespread concern. Zeolite ...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/86H01M4/90
CPCH01M4/8647H01M4/88H01M4/9008Y02E60/50
Inventor 宋玉江翟梓会
Owner DALIAN UNIV OF TECH
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