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N-doped carbon-loaded double-scaling transition metal phosphide and preparation method and application thereof

A transition metal, nitrogen-doped carbon technology, applied in the electrolysis process, electrolysis components, electrodes, etc., can solve the problems that affect the stability and catalytic efficiency of catalytic materials, large phosphide particle size, difficult to control, etc., and achieve raw material prices Inexpensive, long service life, good stability

Active Publication Date: 2018-09-11
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the catalytic activity and stability of electrocatalysts are closely related to particle size, distribution, and carbon coating, the phosphide particles reported above have large particle sizes, are not easy to control, and are not protected by carbon, which will affect the stability and stability of catalytic materials. Catalytic efficiency

Method used

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  • N-doped carbon-loaded double-scaling transition metal phosphide and preparation method and application thereof
  • N-doped carbon-loaded double-scaling transition metal phosphide and preparation method and application thereof
  • N-doped carbon-loaded double-scaling transition metal phosphide and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A. Add 2mmol of disodium EDTA into 100mL beaker a, add 40mL of carbon dioxide-free water, and ultrasonically dissolve. The first batch of 2mmol Co(NO 3 ) 2 ·6H 2 O was added to a 50mL beaker b, and 20mL of carbon dioxide-free water was added, and ultrasonically dissolved. Drop the uniformly mixed solution of b under the protection of an inert atmosphere into the bottle of a, and at the same time use about 1.5M NaOH solution to control the pH value to 5.5, stir for 10 minutes after dropping, and then add 10 mmol of the second batch of cobalt nitrate hexahydrate and Dissolve the mixed solution of 5mmol nonahydrate aluminum nitrate in 100ml deionized water, slowly drop into the above solution, while still using about 1.5M NaOH solution to control the pH=5.5, after the mixed salt solution is dripped, adjust the pH value to 9– 10. Crystallization reaction under high temperature and high pressure environment, centrifugal washing with water and ethanol, drying to obtain bl...

Embodiment 2

[0031] Other conditions are identical with embodiment 1, and difference is only disodium EDTA and first batch of Co(NO 3 ) 2 ·6H 2 O molar ratio is 2:1. The electrocatalytic performance test results are summarized in Table 1.

Embodiment 3

[0033] Other conditions are the same as in Example 1, except that the molar ratio of cobalt nitrate hexahydrate and aluminum nitrate nonahydrate is 3:1. The electrocatalytic performance test results are summarized in Table 1.

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Abstract

The invention discloses a N-doped carbon-loaded double-scaling transition metal phosphide and a preparation method and application thereof. Cobalt sources are introduced into a laminate and the interlayer of the phosphide at the same time, and CoP / CoP2 with the smaller granular size and CoP / CoP2 with the extremely small quantum points can be obtained after combustion phosphorization is conducted,and thus the catalytic efficiency is enhanced. In addition, carbon sources are introduced into Al2O3 generated by the laminate and the interlayer, the double confinement effect effectively stops agglomeration and volume expansion effects of the nanometer particles, so that the overpotential of the oxygen evolution reaction is greatly lowered, and the catalytic efficiency is further improved.

Description

technical field [0001] The invention belongs to the technical field of electrocatalyst preparation, and relates to a preparation method of a nitrogen-doped carbon-supported dual-scale transition metal phosphide. The method uses transition metal cobalt and ethylenediamine tetraacetate (EDTA 2– ) complex (CoEDTA 2– ) intercalated cobalt-aluminum hydrotalcite as a double-cobalt source precursor, red phosphorus as a phosphorus source, and a dual-scale cobalt-based phosphide catalyst prepared by calcination at 500 °C under an argon atmosphere. The present invention is applied to oxygen evolution reaction, at 10mAcm –2 The required overpotential at the current density is 310mV. Background technique: [0002] Currently, most of human energy comes from fossil fuels. However, the combustion of fossil fuels has caused serious environmental pollution problems. Therefore, with the growing economy and global energy consumption, our energy demand for safe, sustainable and clean alter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B1/04
CPCC25B1/04C25B11/091Y02E60/36
Inventor 徐赛龙辛伟利李慧
Owner BEIJING UNIV OF CHEM TECH
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