Double-carbon-confined iridium nanocluster and preparation method and application thereof

A nano-cluster and confinement technology, applied in the field of electrocatalyst preparation, can solve the problems of reducing the number of active sites of materials, uneven aggregation and dispersion, and reducing catalytic performance, and achieve excellent activity, improve catalytic activity, and increase catalytic activity. Effect
CN110292939AActive Publication Date: 2019-10-01BEIJING UNIV OF CHEM TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING UNIV OF CHEM TECH
Publication Date
2019-10-01

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Abstract

The invention discloses a double-carbon-confined iridium nanocluster catalyst and a preparation method and application thereof. The double-carbon-confined iridium nanocluster catalyst is a composite material formed by dispersing iridium nanodots on a carbon matrix, and the carbon matrix is graphene oxide and S-doped mesoporous carbon. Ultra-small nano-sized iridium nanoclusters are prepared through the double confinement effect of two carbon groups, and the aggregation of iridium nano-particles can be effectively prevented. The finally obtained catalyst has large specific surface area, the active sites of the catalyst are increased, the overpotential and Tafel slope of electrolytic water reaction are greatly reduced, the performance of the catalyst is effectively improved, and the catalysthas long service life and good stability. In addition, the preparation method of the catalyst is simple, the raw materials are cheap and readily available, the reserves are abundant, the preparationprocess is simple and easy to operate, and the catalyst is a catalyst with practical value for electrolyzed water.
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Description

technical field

[0001] The invention belongs to the technical field of electrocatalyst preparation, and in particular relates to a double-carbon-confined iridium nanocluster, a preparation method and application thereof. Background technique:

[0002] Electrochemical water splitting is one of the most promising and most concerned technologies for producing hydrogen energy. The most critical technical problem for successful industrialization is to find a suitable catalyst. In alkaline media, water electrolysis involves two half-reactions, the water reduction reaction (HER) at the cathode and the water oxidation reaction (OER) at the anode. Because the OER reaction involves a four-electron transfer process, it is more complex in nature and has a slower kinetic process, resulting in the need for a high overpotential to promote the reaction efficiency, so the OER reaction is an important factor that limits the entire process of electrolysis of water. step. Therefore, it is ve...

Claims

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