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A kind of heteroatom-doped cobalt-molybdenum binary metal carbide nanocomposite material and its preparation method and application

A technology of nanocomposite materials and metal carbides, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the limited price of anode hydrogen oxidation reaction, easy to poison platinum group precious metals, resources Scarcity and other issues, to achieve high-efficiency hydrogen oxidation reaction catalytic activity, easy large-scale production, and abundant sources

Active Publication Date: 2022-03-11
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of heteroatom-doped cobalt-molybdenum binary metal carbide nanocomposite material and its preparation method and application
  • A kind of heteroatom-doped cobalt-molybdenum binary metal carbide nanocomposite material and its preparation method and application
  • A kind of heteroatom-doped cobalt-molybdenum binary metal carbide nanocomposite material and its preparation method and application

Examples

Experimental program
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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 nanocomposite material and a preparation method and application thereof. The composite is abbreviated as D‑Co 2 Mo 4 C; where D is doped with heteroatoms P, N, B, Sn or Se; after adding the pretreated support material to the transition metal precursor solution of cobalt salt, molybdenum salt and heteroatom dopant, ultrasonic treatment and mixing , hydrothermal reaction at 90-180°C, after washing and drying, the intermediate product of the composite material obtained is obtained by heat treatment at 600-1200°C in a reducing atmosphere or a protective atmosphere. The composite material of the invention has high-efficiency hydrogen oxidation reaction catalytic activity in alkaline, has the potential to be applied in the anode of anion exchange membrane fuel cell, and has a certain positive effect on promoting the development of new fuel cells. It is used as a non-noble metal catalyst for the hydrogen oxidation reaction in an alkaline medium and is applied in the field of electrocatalysis.

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 Patents(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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