Synthesis And Properties Research Of Nitrogen-doped Porous Carbon

With the rapid development of industry,mineral resources are increasingly reduced,research and exploration about new energy has become a hot spot,in which fuel cell as a energy conversion and storage devices,gradually aroused people's interest.The fuel cell consists of two electrodes,electrolyte and diaphragm.The performance of the fuel cell depends on the rate of the cathode reaction,which just depends on the cathodic oxygen reduction reaction(ORR)catalyst,so people have been looking for the high-performance cathode oxygen reduction catalyst.Among all the cathode oxygen reduction catalysts,nitrogen-doped porous carbon materials are favored by researchers because of their low price,excellent and stable ORR performance.In this paper,two nitrogen-doped porous carbon nanosheets were prepared by high-temperature heat treatment,and they were used as ORR catalysts to study their catalytic performance.The main contents of the study are as follows:(1)In the second chapter of the paper,nitrogen-doped porous carbon nanosheets(CN)were prepared by high-temperature heat treatment and hydrochloric acid post-treatment of d-calcium pantothenate,which was the nitrogen-containing carbon source.The structure and morphology of the catalysts were characterized by scanning electron microscopy and so on.The content and type of nitrogen were also characterized by elemental analysis and so on.Electrochemical performance test results show that,in alkaline conditions,CN has a high catalytic activity,good stability and anti-methanol capacity.(2)In the third chapter of the paper,we also take the high-temperature pyrolysis method to prepare nitrogen-doped porous carbon nanoplate.Unlike the previous one,we added zinc acetate as a template and oleic acid and benzimidazole as carbon source and nitrogen source,respectively.Similarly,the structure and morphology of the catalysts were also characterized by scanning electron microscopy and so on.We used the cyclic voltammetry method to conduct the ORR catalytic performance of the catalyst.Compared to commercial Pt/C catalysts,this nitrogen-doped carbon material has a longer-term stable performance and resistance to methanol.