Gas diffusion electrode carried with double-shell core-shell catalyst and preparation and application thereof

A gas diffusion electrode, core-shell catalyst technology, applied in battery electrodes, circuits, electrical components, etc., to achieve the effect of enhanced stability, stable performance, and easy mass production
CN102881916BActive Publication Date: 2015-07-15中科军联(张家港)新能源科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
中科军联(张家港)新能源科技有限公司
Publication Date
2015-07-15

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Abstract

A gas diffusion electrode carried with a double-shell core-shell catalyst consists of a gas diffusion layer and a core-shell catalyst layer obtained on the gas diffusion layer in situ. A catalyst in the catalyst layer is the double-shell core-shell catalyst using a carbon-supported Pd alloy catalyst as a core, using Pt located on the surface as an outer shell and using Au located between the Pt shell and an alloying inner shell. A preparation method comprises three steps of (1) preparing the gas diffusion layer, (2) preparing the inner shell of the Pd alloy catalyst and (3) preparing the core-shell catalyst layer. When the gas diffusion electrode serves as a gas diffusion cathode for a metal air fuel cell, a proton exchange membrane fuel cell and a direct liquid fuel cell, the gas diffusion electrode has the advantages of being low in precious metal carrying capacity, high in utilization ratio, good in stability and the like, can remarkably reduce the fuel cell cost and is easily produced in a batch mode. In addition, the preparation method is simple and easy to operate.
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Description

technical field

[0001] The invention relates to a gas diffusion electrode loaded with a double-layer core-shell catalyst, in particular to a gas diffusion electrode used for metal-air fuel cell cathodes, proton exchange membrane fuel cell cathodes and direct liquid fuel cell cathodes.

[0002] The present invention also relates to the preparation method and application of the above-mentioned gas diffusion electrode loaded with double-layer core-shell catalyst. Background technique

[0003] With the increasing consumption of fuels such as coal, oil and natural gas and the depletion of energy resources, it is urgent to find energy technologies that are environmentally friendly and sustainable. Because of its high energy conversion efficiency, no pollution, no noise and other advantages, fuel cells have become a research hotspot all over the world.

[0004] Currently, Pt and its alloy catalysts are still the most effective catalysts for the fuel cell cathode oxygen reduction r...

Claims

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