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According to the Chinese Academy of Sciences, under the guidance of Li Yuliang, an academician of the Chinese Academy of Sciences, Huang Changshui, a researcher at the Qingdao Institute of Bioenergy and Process, Chinese Academy of Sciences, led a carbon-based materials and energy application research group to design a new type of graphite in which some carbon atoms in the benzene ring are connected to hydrogen. Alkynyl carbon material (HsGDY) catalyst. The design and implementation of this material was based on the successful synthesis and application of a large number of graphene-based materials in the early stage of the research group.
It is understood that, thanks to the unique structure of HsGDY, in the post-treatment process, the carbon-based materials and energy application research group accurately controlled the nitrogen incorporation type, and the selective incorporation is most effective for the fuel cell cathodic electrocatalysis. A pyridine nitrogen atom, thereby achieving excellent catalytic performance. At the same time, HsGDY has hexagonal macropores with a molecular pore size of 1.63 nm, which is beneficial to the mass transfer of reactants and products during the reaction. It was found by electrochemical tests that the pyridinium-doped HsGDY exhibited superior activity over the commercial carbon-supported platinum catalyst under alkaline conditions. Its current density at a potential of 0.85 V is 1.6 times that of a commercial carbon-supported platinum catalyst, and it has better stability and resistance to methanol poisoning than platinum supported on carbon. Pyridinium-doped HsGDY has shown great potential as a new fuel cell cathode catalyst in place of traditional platinum-based catalysts. This method of designing carbon materials to achieve accurate doping of heteroatoms also provides new ideas for the preparation of other doped nanomaterials.
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