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Heteroatom doped cobalt-molybdenum binary metal carbide nano composite material as well as preparation method and application thereof

A nanocomposite material, metal carbide technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc. Scarcity and other problems, to achieve the effect of high-efficiency hydrogen oxidation reaction catalytic activity, easy large-scale production, and abundant sources

Active Publication Date: 2021-03-23
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the shortcomings and shortcomings of the anode hydrogen oxidation reaction of anion exchange membrane fuel cells in the above-mentioned prior art that are limited by expensive, scarce resources, and easily poisoned platinum group noble metals, the primary purpose of the present invention is to provide a heteroatom doped Cobalt-molybdenum binary metal carbide nanocomposites (D-Co 2 Mo 4 c)

Method used

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  • Heteroatom doped cobalt-molybdenum binary metal carbide nano composite material as well as preparation method and application thereof
  • Heteroatom doped cobalt-molybdenum binary metal carbide nano composite material as well as preparation method and application thereof
  • Heteroatom doped cobalt-molybdenum binary metal carbide nano composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032](1) Ultrasonicate 200 mg of commercial foamed cobalt support material in acetone for 5 min, then wash five times with secondary deionized water, then ultrasonicate in 3mol / L hydrochloric acid solution for 10 min, and then wash with secondary deionized water to medium properties, and then rinsed with absolute ethanol three times, and dried in vacuum at 50°C to obtain a pretreated foamed cobalt support material;

[0033] (2) Dissolve 0.909g of cobalt nitrate in 60mL of secondary deionized water, sonicate for 20min, then add 0.551g of ammonium molybdate, sonicate for 30min, then add 0.4g of sodium hypophosphite, and sonicate for 30min to obtain a uniformly mixed Transition metal precursor solution;

[0034] (3) Add the foamed cobalt support material pretreated in step (1) to the transition metal precursor solution obtained in step (2), and ultrasonically treat it for 30 minutes; Reactor at 180°C for 6 hours to obtain a composite intermediate product;

[0035] (4) The inte...

Embodiment 2

[0038] (1) Ultrasonicate 200 mg of commercial foamed cobalt support material in acetone for 5 min, then wash five times with secondary deionized water, then ultrasonicate in 3mol / L hydrochloric acid solution for 10 min, and then wash with secondary deionized water to medium properties, and then washed three times with absolute ethanol, and dried in vacuum at 50°C to obtain the pretreated foamed cobalt support material;

[0039] (2) Dissolve 1.262g of sodium cobalt nitrite in 60mL of secondary deionized water, sonicate for 20min, then add 0.551g of ammonium molybdate, sonicate for 30min, then add 0.4g of sodium hypophosphite, and sonicate for 30min to obtain a uniform mixed transition metal precursor solution;

[0040] (3) Add the foamed cobalt support material pretreated in step (1) to the transition metal precursor solution obtained in step (2), and ultrasonically treat it for 30 minutes; then transfer it to a 100ml polytetrafluoroethylene liner and put it into In a hydrothe...

Embodiment 3

[0043] (1) Ultrasonicate 200 mg of commercial foamed cobalt support material in acetone for 5 min, then wash five times with secondary deionized water, then ultrasonicate in 3mol / L hydrochloric acid solution for 10 min, and then wash with secondary deionized water to medium properties, and then rinsed with absolute ethanol three times, and dried in vacuum at 50°C to obtain a pretreated foamed cobalt support material;

[0044] (2) Dissolve 0.909g of cobalt nitrate in 60mL of secondary deionized water, sonicate for 20min, then add 0.551g of ammonium molybdate, sonicate for 30min, then add 0.4g of sodium hypophosphite, and sonicate for 30min to obtain a uniform transition Metal precursor solution;

[0045] (3) Add the foamed cobalt support material pretreated in step (1) to the transition metal precursor solution obtained in step (2), and ultrasonically treat it for 30 minutes; then transfer it to a 100ml polytetrafluoroethylene liner and fill it with water Heat the reaction ket...

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Abstract

The invention belongs to the field of energy materials, and discloses a heteroatom doped cobalt-molybdenum binary metal carbide nano composite material as well as a preparation method and applicationthereof. The composite material is abbreviated as D-Co2Mo4C, wherein D is doped heteroatoms P, N, B, Sn or Se. The preparation method comprises the following steps of: adding a pretreated support material into a transition metal precursor solution of cobalt salt, molybdenum salt and a heteroatom dopant; carrying out ultrasonic treatment to uniformly mixing the materials; carrying out hydrothermalreaction at 90-180 DEG C; performing cleaning, drying; and carrying out heat treatment on a obtained composite material intermediate product at 600-1200 DEG C in a reducing atmosphere or a protectiveatmosphere. The composite material disclosed by the invention has efficient hydrogen oxidation reaction catalytic activity in alkalinity, has the potential of being applied to an anode of an anion exchange membrane fuel cell, and has a certain positive effect on promoting the development of a novel fuel cell. The composite material is applied to the field of electrocatalysis as a non-noble metal catalyst for a hydrogen oxidation reaction in an alkaline medium.

Description

technical field [0001] The invention belongs to the technical field of energy materials, and more specifically relates to a heteroatom-doped cobalt-molybdenum binary metal carbide nanocomposite material (D-Co 2 Mo 4 C) and its preparation method and application. Background technique [0002] The research on fuel cells is of great significance to the realization of hydrogen energy economy and sustainable development. It is not limited by the Carnot cycle, and its energy conversion efficiency is much higher than that of traditional heat engines. The reaction process and reaction products are clean and friendly, and it has received extensive attention in the field of new energy research. [Science, 2020, 184, 188]. As a key core component of fuel cells, electrocatalysts play a decisive role in their cost and performance. Platinum group noble metal catalysts have high catalytic activity, but are expensive and scarce resources, which greatly limit the commercial application of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88B82Y30/00B82Y40/00
CPCH01M4/90H01M4/8825B82Y30/00B82Y40/00H01M2004/8684Y02E60/50
Inventor 冯敏岳鑫黄少铭
Owner GUANGDONG UNIV OF TECH
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