Wang Qi research group of Hefei academy of materials, Chinese Academy of Sciences made progress in the research of three-dimensional graphene platinum catalyst used in fuel cell

Direct methanol fuel cell, The working principle of DMFC) is that in the process of oxidation-reduction reaction, the methanol of anode loses electrons under the action of catalyst, and passes through the external circuit to the cathode At the same time, hydrogen ions (acid electrolyte) are transferred from the anode to the cathode through the electrolyte membrane, and then the oxygen of the cathode is catalysed to get electrons to form a current circuit to provide electric energy The catalyst is very important to the methanol oxidation reaction of anode In recent years, the related research is more and more in-depth Platinum (PT), as a noble metal catalyst with excellent performance, has always been concerned by researchers, and the support of platinum nanoparticles often has a great impact on the final catalytic performance Graphene oxide is often used as the support of precious metals However, the electrochemical performance of graphene oxide is not satisfactory Recently, Wang Qi, research group of applied plasma research office of plasma Institute, Hefei Institute of material science, Chinese Academy of Sciences, has made progress in methanol oxidation reaction, and relevant contents have been published on appl Surf SCI (DOI: 10.1016/j.apsusc 2018.04.094) The researchers self assemble graphene oxide (go) and carbon nanotubes (CNTs) to form a three-dimensional structure, then load platinum, and through hydrogen plasma discharge, we can get platinum based three-dimensional graphene carbon nanotubes catalyst (Pt / gnts) with large specific surface area, which has excellent catalytic performance for methanol oxidation The route integrates the advantages of go and CNTs to form a three-dimensional composite structure by self-assembly, which increases the specific surface area and is more conducive to the distribution of platinum nanoparticles Subsequently, a series of catalysts with different mass ratio of go to CNTs were prepared in the experiment The results show that the catalyst with go: CNTs = 1:2 has the best catalytic performance for methanol, and the current density is as high as 691.1 MA / Mg, which is 87.7% higher than that of commercial platinum carbon catalyst, and better than other catalysts reported in most parts After 3600 The current density of S is still high after Ca test This study is of great significance for the preparation of efficient catalysts for methanol oxidation, and provides a new way for the preparation of three-dimensional graphene support The research work was supported by the National Natural Science Foundation of China, the science foundation for Distinguished Young Scholars of Anhui Province, the youth Promotion Association of Chinese Academy of Sciences, and the dean's fund of Hefei Research Institute