Carbon aerogel loaded platinum alloy oxygen reduction electrocatalyst as well as preparation method and application thereof

A technology of carbon airgel and electrocatalyst, which is applied in the direction of circuits, electrical components, battery electrodes, etc., can solve the problems of high platinum content, insufficient durability, weak force between carbon carrier and loaded platinum, and achieve activity and durability Good, universal applicability, convenient mass production effect

Pending Publication Date: 2022-04-19
NAT UNIV OF DEFENSE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a carbon-aerogel-supported platinum alloy oxygen reduction electrocatalyst and its preparation method and application, which are used to overcome the high platinum content in the carbon-supported platinum oxygen reduction electrocatalyst in the prior art, and the gap between the carbon carrier and the platinum-supported Weak force and insufficient durability

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  • Carbon aerogel loaded platinum alloy oxygen reduction electrocatalyst as well as preparation method and application thereof
  • Carbon aerogel loaded platinum alloy oxygen reduction electrocatalyst as well as preparation method and application thereof
  • Carbon aerogel loaded platinum alloy oxygen reduction electrocatalyst as well as preparation method and application thereof

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preparation example Construction

[0027] The invention proposes a method for preparing a carbon aerogel-supported platinum alloy oxygen reduction electrocatalyst, comprising the following steps:

[0028] S1: Select the first organic substance and the second organic substance that can undergo polycondensation reaction to form a macromolecular network structure, weigh the first organic substance and the second organic substance according to the molar ratio, dissolve them in water, stir until they are completely dissolved, and obtain an organosol.

[0029] Preferably, the first organic compound is an aldehyde organic compound containing aldehyde groups; the second organic compound is a polyhydroxybenzene compound or a polyaminobenzene compound. Aldehyde-containing organic aldehydes can undergo polycondensation reactions with polyhydroxybenzene compounds or polyaminobenzene compounds to form macromolecular network structures.

[0030] Preferably, the aldehyde organic compound containing aldehyde group is formaldeh...

Embodiment 1～27

[0053] Embodiment 1 provides a kind of preparation method of carbon airgel supported platinum alloy oxygen reduction electrocatalyst, such as figure 1 shown, including the following steps:

[0054] S1: Select 1mol resorcinol ( figure 1 Organic matter in 2) and 2mol formaldehyde ( figure 1 The organic matter 1) in the solution was dissolved in 60mol deionized water, and stirred until completely dissolved to form a homogeneous organosol A.

[0055] S2: 1 / 25mol of cobalt chloride hexahydrate ( figure 1 Inorganic metal salt in), be dissolved in the dehydrated alcohol whose molar mass is 12 times, stir until completely dissolving, form the cobalt chloride inorganic salt solution ( figure 1 Inorganic metal salt solution). Choose epichlorohydrin whose molar mass is 8 times of the molar mass of cobalt chloride hexahydrate to join in the inorganic metal salt solution, continue to stir until the solution is clear, and prepare cobalt chloride sol B ( figure 1 Metal sols in B).

[0...

Embodiment 28

[0066] This embodiment provides a method for preparing a carbon aerogel-supported platinum alloy oxygen reduction electrocatalyst, comprising the following steps:

[0067] S1: Select 1mol resorcinol ( figure 1 Organic matter in 2) and 2mol formaldehyde ( figure 1 The organic matter 1) in the solution was dissolved in 36mol deionized water and stirred until completely dissolved to form a homogeneous organosol A.

[0068] S2: 1 / 25mol of ferric chloride hexahydrate ( figure 1 Inorganic metal salt in), be dissolved in dehydrated alcohol whose molar mass is 12 times, stir until completely dissolving, form ferric chloride inorganic salt solution ( figure 1 Inorganic metal salt solution). Select propylene oxide whose molar mass is 8 times the molar mass of ferric chloride hexahydrate to join in the inorganic metal salt solution, continue to stir until the solution is clear, and prepare cobalt chloride sol B ( figure 1 Metal sols in B).

[0069] S3: Mix organosol A and cobalt chl...

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Abstract

The invention discloses a carbon aerogel loaded platinum alloy oxygen reduction electrocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing organic sol, preparing metal sol, preparing monatomic metal doped carbon aerogel, adding a platinum precursor into the monatomic metal doped carbon aerogel to prepare the carbon aerogel loaded platinum alloy oxygen reduction electrocatalyst, and the like. According to the preparation method, on the basis of a sol-gel chemical principle for preparing carbon aerogel, atomic-scale dispersed non-noble metal is uniformly introduced into a carbon aerogel skeleton to serve as an alloy element source, and meanwhile platinum nanoparticles are anchored. In the oxygen reduction electrocatalyst prepared by the preparation method, non-noble metal and platinum alloy dispersed on a carbon aerogel skeleton in an atomic scale are synergistically catalyzed, the activity and durability of the oxygen reduction electrocatalyst are good, and the activity and durability of the oxygen reduction electrocatalyst far exceed those of commercial carbon black loaded platinum under the condition of relatively low platinum content; the electrocatalyst is suitable for being used as an oxygen reduction electrocatalyst for a metal-air battery and a fuel cell.

Description

technical field [0001] The invention relates to the technical field of oxygen reduction electrocatalysts, in particular to a carbon airgel-supported platinum alloy oxygen reduction electrocatalyst and its preparation method and application. Background technique [0002] The proton exchange membrane fuel cell converts chemical energy into electrical energy through the chemical reaction of hydrogen and oxygen. The product is only water, which is clean and pollution-free. It is a new type of energy conversion device used to solve environmental pollution and energy shortages. The oxygen reduction reaction occurs at the cathode of the proton exchange membrane fuel cell. The specific process mainly includes: the activation of oxygen molecules, the activated oxygen combines with hydrogen protons on the surface of the catalyst to form intermediates, and the intermediates are desorbed from the surface of the catalyst and decomposed into the final product water. The oxygen reduction r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/92
CPCH01M4/88H01M4/921H01M4/926
Inventor 冯军宗罗燚冯坚姜勇刚李良军王鲁凯
Owner NAT UNIV OF DEFENSE TECH
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