Fuel-cell catalyst with non-platinum core-shell structure and preparation method of fuel-cell catalyst

Abstract

The invention provides a fuel-cell catalyst with a non-platinum core-shell structure and a preparation method of the fuel-cell catalyst, and relates to a fuel-cell catalyst. A carrier of the catalyst is activated carbon, the active ingredient of the carrier is Fe-coated Pd, the molar ratio of nanocrystalline iron of the active ingredient Fe-coated Pd to palladium of the active ingredient Fe-coated Pd is 5:1, and the active ingredient Fe-coated Pd accounts for 40%-50% of the total mass of the fuel-cell catalyst with the non-platinum core-shell structure. The preparation method comprises the followings steps of: dissolving the activated carbon into water; performing ultrasonic treatment on the mixture; leading shielding gas in the mixture; adding reducing agents in the mixture; then adding a ferric salt aqueous solution in the mixture; reacting and then adding a palladium chloride aqueous solution in the mixture to perform replacement reaction; and filtering, washing and drying the mixture after the replacement reaction so as to obtain a product. The electrocatalytic activity of the catalyst is 10.63 times that of the traditional carbon load palladium nanocrystal Pd / C catalyst, and is 23.05 times that of a commercial Pt / C catalyst. The cost is low, the preparation method is simple and practicable, the particle size of the catalyst is easy to control, and the fuel-cell catalyst is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a fuel cell catalyst, in particular to a fuel cell catalyst with a non-platinum core-shell structure and a preparation method thereof. Background technique [0002] Energy production and consumption are related to global climate change. Currently, 80% of energy consumption relies on fossil fuels—coal and oil. However, the traditional energy consumption has the following disadvantages: coal and oil are non-renewable resources and will be used up quickly; because the energy conversion of traditional heat engines is limited by the Carnot cycle, the utilization rate of combustion relative to energy is very low; a large number of fossils A large amount of carbon dioxide and CO produced by the combustion of fuel x , NO x pollutants, causing serious environmental problems such as the greenhouse effect and acid rain. The traditional energy structure and low utilization rate cannot meet the needs of efficient, clean, economical and ...

AI Technical Summary

Problems solved by technology

However, there is a lack of more precise control over cost, core composition, grain size, and microstructure, especially to further substantially reduce the use of noble metal Pt or replace Pt with other noble metals that are cheaper than Pt while maintaining the original catalytic performance. technical flaw

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