Prepartion Of Element Doped Porous Carbon Materials And Study Of Their Electrocatalysis Application

Doped carbon materials, as a kind materials with high fuel selectivity,anti-CO toxicity, long stability on ORR catalysis application, have drawmany attention. To realize the heteroatom doping, many methods havebeen presented such as chemical vapor deposition, hydrothermal, pyrolysis.In this paper, we prepare the heteratom doped carbon aergoels,2Dnanosheets and high specify surface area activatied carbon by usinghydrothermal, pyrolysis and carbon dioxide activation, respectively. Thedetails are as follows:(1) We apply ammonium thiocyanate as the sulfur&nitrogen source,for the characteristic of the salt that ammonium thiocyanate decomposes toammonia, hydrogen sulfide during hydrothermal process. During thehydrothermal process, doped atoms can be doped into graphene oxideframework sucessfully, and graphene oxide is also reduced. The resultsshow that nitrogen, sulfur atoms are uniformly distributed in the grapheneframwork. The high specific surface area and doped atoms result to anexcellent oxygen reduction electrocatalytic characterization.(2) Two dimensional graphene based polymer have beenmanufactured by using3-Aminobenzeneboronic acid hemisulfate salt,aniline and m-phenylenediamine as monomers, aniline functionalizedgraphene oxide as substrate. The polymer wrapped up the anilinefunctionalized graphene oxide. The product after polymerzation is used asthe raw material of thermal treatment. After pyrolysis and carbon dioxideactivation, we fabricate a kind of new two dimensional graphene basedboron and nitrogen co-doped carbon with a high specific surface area. Theresulting materials have been characterized with ORR test and shown an excellent electrocatalytic activity.(3) In this work, activated carbon is used as raw materials. We useammonia to activate the materials in high temperature. During thepyrolysis process, the specific surface area increase, while nitrogen atomsare doped into carbon framwork. The resulting material shows a ultra-highspecific surface area and excellent electrocatalytic activity for oxygenreduction.