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    Home > Coatings News > Paints and Coatings Market > Progress has been made in the use of 3D graphene platinum catalysts in fuel cell research

    Progress has been made in the use of 3D graphene platinum catalysts in fuel cell research

    • Last Update: 2020-12-24
    • Source: Internet
    • Author: User
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    Recently, Wang Qi of the Plasma Research Office of the Plasma Physics Research Institute of the Hefei Institute of Material Sciences of the Chinese Academy of Sciences made progress on methanol oxidation reactions, which were published in Applied Surface Science.Direct Methanol Fuel Cell (DMFC) works by losing electrons under the action of a catalyst during a redox reaction, while hydrogen ions (acid electrolytes) are transferred from the anode to the cathode through an electrolyte membrane, and the cathode's oxygen is catalytically reduced to electrons to form an electrical circuit that provides electrical energy. Among them, catalysts are very important to the methanol oxidation reaction of anodes, and in recent years the relevant research has been more and more in-depth, mainly from improving the utilization rate of precious metal catalysts, modifying carriers and preparing alloy catalysts to improve anti-poisoning capacity. Platinum (Pt) has been the focus of researchers as a high-performance precious metal catalyst, in which carriers of loaded platinum nanoparticles often have a greater impact on the final catalytic properties. Graphene oxide is often used in the carrier of precious metals, but directly with graphene oxide as a carrier, electrochemical performance testing can not achieve the desired results.researchers have assembled graphene oxide (GO) and carbon nanotubes (CNTs) to form a three-dimensional structure, then load platinum, and discharge hydrogen plasma to obtain a platinum-based 3D graphene-carbon nanotube catalyst (Pt/GNTs) with a large surface area, with excellent methanol oxidation catalytic properties. The technical route combines the advantages of GO and CNTs to form a three-dimensional composite structure by self-assembly, which increases the surface area and is more beneficial to the distribution of platinum nanoparticles (Figure 1). The researchers then prepared a series of catalysts with different GO-to-CNTs mass ratios (GO:CNTs=0:1,1:6,1:4,1:2,1:1,2:1,4:1,6:1 and 1:0) in the experiment. It was found that GO:CNTs had the best catalytic performance of methanol at 1:2, with a current density of 691.1mA/mg, which was 87.7% higher than commercial platinum catalyst performance and better than most other catalysts reported, and remained high after CA testing of 3600s (Figure 2). The results have a lot to do with the structural performance of the carrier, and the detailed analysis can be found in the original text. This study is of great significance to the preparation of an efficient methanol oxidation reaction catalyst, and also provides a new way of thinking for the preparation of 3D graphene carriers.research has been supported by the National Natural Science Foundation of China, anhui Provincial Science Foundation for Distinguished Young People, the Chinese Academy of Sciences Youth Promotion Association talent special, Hefei Research Institute President's Fund.
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