Pt-loaded graphene hollow microspherical catalyst and preparation method and application therefor

A graphene and catalyst technology, applied in the field of fuel cells, can solve problems such as cost reduction
CN105322192AInactive Publication Date: 2016-02-10SOUTH CHINA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Publication Date
2016-02-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of fuel cells, and discloses a Pt-loaded graphene hollow microspherical catalyst and a preparation method and an application therefor. The preparation method comprises the steps of (1) mixing an oxidized graphene water-dispersing solution with a silicon dioxide sphere-dispersing liquid, performing ultrasonic dispersion, freezing and drying to obtain an oxidized graphene / silicon dioxide sphere compound; (2) putting the compound into a tubular furnace for performing thermal processing to obtain black powder; adding the black powder into a strong alkali solution or a strong acid solution for stirring and reacting, filtering, washing and drying to obtain graphene hollow spherical powder; and (3) immersing the graphene hollow spherical powder into a chloroplatinic acid solution or a platinum nitrate solution, performing ultrasonic mixing, freezing and drying to obtain powder; putting the powder into the tubular furnace, performing heating and insulation treatment in an argon-hydrogen mixed gas, then naturally cooling to obtain the Pt-loaded graphene hollow microspherical catalyst. The catalyst prepared by the invention is better in electrocatalytic activity and stability on methanol oxidation.
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Description

technical field

[0001] The invention belongs to the technical field of fuel cells and relates to an electrocatalyst, in particular to a Pt-loaded graphene hollow microsphere catalyst and a preparation method and application thereof. Background technique

[0002] Fuel cells have attracted increasing attention in recent decades due to the increasing demand for energy, coupled with the depletion of fossil fuels and increasing environmental pollution around the world. It has the characteristics of high energy conversion efficiency, low emission and even zero emission. Currently, the production, storage and delivery of hydrogen are major challenges in addition to issues of cost, reliability and durability. Direct Methanol Fuel Cell (DMFC), which utilizes renewable methanol liquid as fuel, has been considered a good choice both in terms of fuel usage and feed method [1,2] . Therefore, compared to hydrogen-supplied fuel cells, since hydrogen fuel cells have a reformer or low-cap...

Claims

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