A method for preparing a doped carbon material supported alloy bifunctional electrocatalyst that have a hollow polyhedral nanocage microstructure

An electrocatalyst and microstructure technology, applied in structural parts, circuits, electrical components, etc., can solve problems such as high cost and limited practical application, and achieve the goal of optimizing electronic structure, improving bifunctional electrocatalytic activity, and enhancing electrocatalytic performance Effect

Inactive Publication Date: 2018-12-07
HENAN NORMAL UNIV
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Problems solved by technology

[0004] Currently, noble metals and alloys such as Pt, Pt-Au, and Pt-Pd have been studied and developed as bifunctional electrocatalysts for metal-air batteries, however, the limited availability and high cost of these noble metal-based catalysts limit their use in metal-air batteries. Medium and Long-term Practical Applications of Air Batteries

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  • A method for preparing a doped carbon material supported alloy bifunctional electrocatalyst that have a hollow polyhedral nanocage microstructure
  • A method for preparing a doped carbon material supported alloy bifunctional electrocatalyst that have a hollow polyhedral nanocage microstructure
  • A method for preparing a doped carbon material supported alloy bifunctional electrocatalyst that have a hollow polyhedral nanocage microstructure

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Experimental program
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Effect test

Embodiment 1

[0025] Step S1: Dissolve 249mg of cobalt nitrate and 328mg of 2-methylimidazole respectively in 25mL of methanol until completely dissolved, then add the cobalt nitrate solution into the 2-methylimidazole solution to form a purple mixed solution, and let it stand at room temperature for 24h , washed several times with methanol and vacuum dried to obtain a purple powder sample, namely the ZIF-67 precursor;

[0026] Step S2: Disperse 80 mg of the ZIF-67 precursor obtained in step S1 and 150 mg of nickel nitrate in 25 mL of methanol, heat it in a water bath to reflux for 0.5 h after the dispersion is uniform, wash with ethanol for several times, and vacuum dry to obtain a light green solid powder;

[0027] Step S3: Add 100 mg of magnesium nitrate and 160 mg of sodium borate to the light green solid powder obtained in step S2, and ultrasonically disperse in 25 mL of ethanol, then react at 90°C for 1 h by solvothermal method, cool naturally to room temperature, and wash several time...

Embodiment 2

[0030] Step S1: Dissolve 249mg of cobalt nitrate and 328mg of 2-methylimidazole respectively in 25mL of methanol until completely dissolved, then add the cobalt nitrate solution into the 2-methylimidazole solution to form a purple mixed solution and let it stand at room temperature for 18h , washed several times with methanol and vacuum dried to obtain a purple powder sample, namely the ZIF-67 precursor;

[0031] Step S2: Disperse 80 mg of the ZIF-67 precursor obtained in step S1 and 80 mg of nickel chloride in 25 m of absolute ethanol, heat it in a water bath to reflux for 1 h after dispersing evenly, wash with ethanol for several times, and vacuum dry to obtain a light green solid powder;

[0032] Step S3: Add 50 mg of magnesium chloride and 80 mg of sodium borate to the light green solid powder obtained in step S2, and ultrasonically disperse in 25 mL of ethanol, then react at 90°C for 0.5 h by solvothermal method, cool naturally to room temperature, and wash several times ...

Embodiment 3

[0035] Step S1: Dissolve 249mg of cobalt nitrate and 328mg of 2-methylimidazole respectively in 25mL of methanol until completely dissolved, then add the cobalt nitrate solution into the 2-methylimidazole solution to form a purple mixed solution, and let it stand at room temperature for 36h , washed several times with methanol and vacuum dried to obtain a purple powder sample, namely the ZIF-67 precursor;

[0036] Step S2: disperse 80 mg of the ZIF-67 precursor obtained in step S1 and 240 mg of nickel-nickel hydroxide in 25 m of absolute ethanol, heat it in a water bath to reflux for 3 hours after the dispersion is uniform, wash with ethanol for several times, and then vacuum-dry to obtain a light green color solid powder;

[0037]Step S3: Add 150mg of magnesium sulfate and 240mg of boron oxide to the light green solid powder obtained in step S2, disperse uniformly in 25mL of ethanol by ultrasonic, then react at 90°C for 3 hours by solvothermal method, cool naturally to room t...

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Abstract

The invention discloses a preparation method of a dual-functional electrocatalyst with a hollow polyhedral nano-cage microstructure doped with carbon material loading alloy, belonging to the field ofzinc Air Battery Catalyst Technology. The technical scheme of the invention mainly comprises the following steps of: adding an alcohol solution of cobalt nitrate and 2-Polyhedral ZIF- 67 precursor Wassynthesized by the reaction of methimidazole with ethanol at room temperature., and then that ZIF-67 precursor and that nickel source are heat and refluxed in an alcohol solvent to obtain hollow polyhedral nanocage product, and the obtained product is solvothermally react with the magnesium source and the boron source to obtain the target product. The catalyst of the invention introduces nickel and magnesium, so that the synergistic action between different components enhances the catalytic activity of the composite material, and the introduction of heteroatom boron effectively optimizes theelectronic structure of the material and improves the electrocatalytic performance. The catalyst of the invention and the preparation method thereof are prepared from zinc. The catalyst for air battery has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of zinc-air battery catalysts, and in particular relates to a preparation method of a bifunctional electrocatalyst with a hollow polyhedral nanocage microstructure doped with a carbon material loaded alloy. Background technique [0002] Zinc-air battery is a kind of metal-air battery, and its invention has a history of hundreds of years. The battery generates electricity through the oxidation of zinc in the air. It is recognized as an excellent energy storage material because of its large capacity, high energy, stable working voltage, long service life, stable performance, non-toxic and harmless, safe and reliable, no explosion hazard, rich resources, and low cost. Become the most promising new energy battery for the next generation. [0003] Zinc-air battery, also known as zinc-oxygen battery, is a primary battery that uses activated carbon to absorb oxygen or pure oxygen in the air as the positive electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90
CPCH01M4/90H01M4/9008H01M4/9083Y02E60/50
Inventor 白正宇牛洋娣张庆陈忠伟杨林吕璐瑶
Owner HENAN NORMAL UNIV
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