A method for mass-preparing platinum-based dealloyed electrocatalysts for fuel cell cathodes

A fuel cell cathode and alloy catalyst technology, applied to battery electrodes, circuits, electrical components, etc., can solve problems such as increased production costs and complicated operations, and achieve the effects of reducing platinum loss, increasing specific activity, and reducing energy consumption
CN105633422BActive Publication Date: 2018-02-13BEIJING UNIV OF CHEM TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING UNIV OF CHEM TECH
Publication Date
2018-02-13

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Abstract

The invention relates to a method for massively preparing a platinum-based dealloyed electrocatalyst for a cathode of a fuel cell, and belongs to the technical field of electrochemistry and new energy. According to the method, dealloying treatment is carried out by acid vapor; direct contact of a catalyst solid and an acid liquid is avoided; and solid-liquid separation operation is omitted. The dealloyed electrocatalyst prepared by the method has a core-shell structure, improves the utilization rate and the specific activity of noble metal platinum are improved and improves the stability. The preparation method reduces the acid consumption and washing water, and reduces platinum loss in the dealloying process. In addition, use of stirring equipment is also avoided in the preparation process; and the energy consumption is reduced. The preparation method provided by the invention is suitable for massive production of the low-platinum electrocatalyst; the problem of massive preparation of the low-platinum electrocatalyst can be effectively solved; and application of the low-platinum electrocatalyst in the fuel cell is promoted, so that the commercialization process of the fuel cell is promoted.
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Description

technical field

[0001] The invention relates to a method for preparing an electrocatalyst for a fuel cell cathode, in particular to a method for preparing a platinum-based dealloyed electrocatalyst in batches, and belongs to the technical fields of electrochemistry and new energy. Background technique

[0002] A fuel cell is an energy conversion device that directly converts chemical energy into electrical energy. At present, the main obstacles limiting its commercialization process are high cost and short lifespan. One of the main reasons for its high cost is the dependence of the electrode catalyst material of the fuel cell on the noble metal platinum. Therefore, much research has been devoted to reducing the platinum loading required in fuel cell electrodes. Studies have shown that the core-shell structure catalyst has higher catalytic activity and larger electrochemical active area than pure platinum, which can reduce the required platinum loading.

[0003] US20100197...

Claims

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