Preparation method for synthesizing polymetallic carbides from carbon nanotubes

A technology of carbon nanotubes and multi-metals, which is applied in the field of synthesis of multi-metal carbides, can solve the problems of non-universality and achieve the effect of simple equipment requirements and low operating temperature

Inactive Publication Date: 2019-02-19
JILIN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods are only suitable for the preparation of single bimetallic carbides and are not universal

Method used

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  • Preparation method for synthesizing polymetallic carbides from carbon nanotubes
  • Preparation method for synthesizing polymetallic carbides from carbon nanotubes
  • Preparation method for synthesizing polymetallic carbides from carbon nanotubes

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Mix 38mg ammonium molybdate, 62mg cobalt nitrate and 13mg carbon nanotubes evenly, put the resulting mixture into a quartz tube, inert atmosphere N 2 Under protection, the mixture was raised from room temperature to 950°C (heating rate: 3°C / min), calcined for 3 hours, and cooled to room temperature. The resulting gray powder is the cobalt-molybdenum bimetallic carbide Co 3 Mo 3 c. The material was tested for electrocatalytic hydrogen evolution performance under the condition of 1M KOH, reaching 10mA cm -2 , an overpotential of 169mV is required.

Embodiment 2

[0023] Mix 38mg of ammonium molybdate, 62mg of nickel nitrate and 13mg of carbon nanotubes evenly, put the resulting mixture into a quartz tube, inert atmosphere N 2 Under protection, the mixture was raised from room temperature to 950°C (heating rate: 3°C / min), calcined for 3 hours, and cooled to room temperature. The obtained gray powder is nickel-molybdenum bimetallic carbide Ni 3 Mo 3 c. The material was tested for electrocatalytic hydrogen evolution performance under the condition of 1M KOH, reaching 10mA cm -2 , an overpotential of 217mV is required.

Embodiment 3

[0025] Mix 31mg ammonium molybdate, 69mg ferric nitrate and 13mg carbon nanotubes evenly, put the resulting mixture into a quartz tube, inert atmosphere N 2 Under protection, the mixture was raised from room temperature to 950°C (heating rate: 3°C / min), calcined for 3 hours, and cooled to room temperature. The obtained gray powder is iron-molybdenum bimetallic carbide Fe 3 Mo 3 c. The material was tested for electrocatalytic hydrogen evolution performance under the condition of 1M KOH, reaching 10mA cm -2 , an overpotential of 302mV is required.

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Abstract

The invention discloses a preparation method for synthesizing polymetallic carbides from carbon nanotubes and belongs to the technical field of material preparation. For solving the problem that existing preparation methods are complex and only applicable to preparing one polymetallic carbides, the preparation method for synthesizing the polymetallic carbide from the carbon nanotubes comprises taking the carbon nanotubes as the carbon source for mixing with salts of metals M (Fe, Co and Ni) and ammonium molybdate and ammonium tungstate, then sintering the mixture in inert atmosphere in a tubefurnace to obtain the polymetallic carbides. The preparation method for synthesizing the polymetallic carbide from the carbon nanotubes is simple in operation, low in cost, good in repeatability and universality, can be applied to preparing a series of polymetallic carbides mainly including bimetallic carbides of Co3Mo3C, Ni3Mo3C, Fe3Mo3C, Co6W6C, Ni6W6C and Fe6W6C and trimetallic carbides of CoxFe3-xMo3C, CoxNi3-xMo3C, NixFe3-xMo3C, CoxFe6-xW6C, NixFe6-xW6C and CoxNi6-xW6C. The prepared polymetallic carbides have excellent electrocatalytic hydrogen evolution performance.

Description

technical field [0001] The invention belongs to the field of material preparation technology and application, in particular to a preparation method for synthesizing polymetallic carbides with carbon nanotubes as raw materials. Background technique [0002] Transition metal carbides have attracted widespread attention due to their unique physical and chemical properties, such as strong electrical conductivity, chemical stability, and high melting point. Especially in energy, such as lithium-ion batteries, supercapacitors, electrocatalytic water splitting, etc., metal carbides have excellent catalytic performance. Compared with monometallic carbides, bimetallic carbides can enhance the conductivity of the material due to their own metal-metal bonds. At the same time, the synergistic effect between metals is more conducive to regulating the electronic structure of the catalyst itself and improving the catalytic activity of the material. [0003] The traditional synthesis meth...

Claims

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Application Information

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IPC IPC(8): B01J23/882B01J23/883B01J23/888
CPCB01J23/882B01J23/883B01J23/888
Inventor 高爽常立民王海瑞聂平赵翠梅
Owner JILIN NORMAL UNIV
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