Preparation and applications for efficient MXene titanium carbide battery catalyst

A titanium carbide and catalyst technology is applied in the field of battery catalysts for preparing a modified two-dimensional material MXenes titanium carbide, which can solve the problems of high cost, accelerated oxygen reduction, and unrealistic large-scale commercial production of catalysts, and achieves good catalytic structure. , good dispersion, the effect of promoting rapid diffusion

Inactive Publication Date: 2019-11-19
HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

In this patented technology, it describes how certain types of metals like Cobalt or Nickel help improve the efficiency of oxidation reactions on platinum (Pt) surfaces during hydrogen production processes. These improvements include increased surface area available for reducing gas molecules' interaction with other components within the system, reduced polarization issues that affect their effectiveness, improved stability over long periods of use, better control over specific areas where they actively participate in chemical redox cycles, etcetera.

Problems solved by technology

Technological Problem: Current Plug Hydrogen Gas Compression Igniting System(PHC) uses expensive noble metallic catalyst for better performance but cannot meet demand because they require precious metals like ruthenium. To overcome these issues, there exists a method called LMPC (Low Pin Count Metal Catalyzator), which combines different types of platy elements into one molecular unit. However, current methods still lack efficiency when producing small amounts of certain substances such as manganese dioxydehydes (MnDO)).

Method used

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  • Preparation and applications for efficient MXene titanium carbide battery catalyst
  • Preparation and applications for efficient MXene titanium carbide battery catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Preparation of MXenes. 1g lithium fluoride and 9M 20mL hydrochloric acid were stirred in a tetrafluoroethylene beaker for 30min. Slowly add 1gMAX-Ti 3 AlC 2 , Stirring was continued at 35°C for 24h. Centrifuge repeatedly with deionized water at a speed of 3500 rpm until the pH reaches neutral. The lower precipitate was collected, filtered and dried.

[0026] Preparation of MXene / ZIF. Weigh 10 mg of MXene and add it to 30 mL of DMSO for ultrasonic dispersion, dissolve 2 mM cobalt nitrate in the DMSO dispersion of MXene, then add 10 mM dimethylimidazole to the above solution, collect the product by centrifugation, and wash with methanol and deionized water Three times, vacuum dry.

[0027] Dissolve the MXene / ZIF obtained above in methanol solution, add hexachlorocyclotriphosphazene and 4,4-p-dihydroxydiphenyl sulfone at a molar ratio of 1:1, add triethylamine dropwise, and stir for 18 hours. Get MXene / ZIF / PZS.

[0028] The MXene / ZIF / PZS was raised to 700 °C at a r...

Embodiment 2

[0030] Preparation of MXenes. 1g lithium fluoride and 9M 20mL hydrochloric acid were stirred in a tetrafluoroethylene beaker for 30min. Slowly add 1gMAX-Ti 3 AlC 2 , Stirring was continued at 35°C for 24h. Centrifuge repeatedly with deionized water at a speed of 3500 rpm until the pH reaches neutral. The lower precipitate was collected, filtered and dried.

[0031] Preparation of MXene / ZIF. Weigh 20mg of MXene and add it to 30mL of DMSO for ultrasonic dispersion, dissolve 2mM cobalt nitrate in the DMSO dispersion of MXene, then add 10mM dimethylimidazole to the above solution, collect the product by centrifugation, wash with methanol and deionized water Three times, vacuum dry.

[0032] Dissolve the MXene / ZIF obtained above in methanol solution, add hexachlorocyclotriphosphazene and 4,4-p-dihydroxydiphenyl sulfone at a molar ratio of 1:1, add triethylamine dropwise, and stir for 18 hours. Get MXene / ZIF / PZS.

[0033] The MXene / ZIF / PZS was raised to 700 °C at a rate of 5...

Embodiment 3

[0035] Preparation of MXenes. 1g lithium fluoride and 9M 20mL hydrochloric acid were stirred in a tetrafluoroethylene beaker for 30min. Slowly add 1gMAX-Ti 3 AlC 2 , Stirring was continued at 35°C for 24h. Centrifuge repeatedly with deionized water at a speed of 3500 rpm until the pH reaches neutral. The lower precipitate was collected, filtered and dried.

[0036]Preparation of MXene / ZIF. Weigh 30mg of MXene and add it to 30mL of DMSO for ultrasonic dispersion, dissolve 2mM cobalt nitrate in the DMSO dispersion of MXene, then add 10mM dimethylimidazole to the above solution, collect the product by centrifugation, wash with methanol and deionized water Three times, vacuum dry.

[0037] Dissolve the MXene / ZIF obtained above in methanol solution, add hexachlorocyclotriphosphazene and 4,4-p-dihydroxydiphenyl sulfone at a molar ratio of 1:1, add triethylamine dropwise, and stir for 18 hours. Get MXene / ZIF / PZS.

[0038] The MXene / ZIF / PZS was raised to 700 °C at a rate of 5 ...

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Abstract

The invention discloses the preparation for an efficient MXene titanium carbide battery catalyst. The preparation is used for electrode catalysts for zinc air batteries. The catalyst adopts titanium carbide (MXene), ZIF-67, and PZS synthetized by phosphonitrilic chloride trimer and p-hydroxydiphenylsulfone as raw materials. The preparation method includes generating, by Ti3AlC2, MXene of a graphene-like material in hydrochloric acid and a lithium fluoride solution; successively adding cobaltous nitrate hexahydrate and dimethyl imidazole into a MXene solution; in-situ generating the ZIF-67 on the surface of the MXene; doping the PZS microspheres; and generating a heteroatom-doped high-performance catalyst after high temperature carbonization. The method is simple; and the prepared catalysthas good conductivity, is large in specific surface area and has important values and meanings in the field of heteroatom-doped carbon-based oxygen reduction electrocatalysts.

Description

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Claims

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Application Information

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Owner HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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