CROP STRAW-BASED NITROGEN-DOPED POROUS CARBON MATERIAL PREPARATION METHOD AND APPLICATION THEREOF

摘要

A crop straw-based nitrogen-doped porous carbon material preparation method and an application, where straw is used as raw material, and straw powder and an alkali metal hydroxide are heated and stirred in an aqueous solution. The processing of lignin, cellulose, and hemicellulose by means of alkaline boiling allows the dense raw material structure to loosen, thereby changing the pore size distribution of the material. Subsequently, an activator potassium bicarbonate and a nitrogen source melamin are sequentially added, and stirring and mixing is performed, then after drying, high temperature pyrolysis, pickling, filtration, and drying steps are undergone, and a catalytic material is obtained. The nitrogen-doped porous carbon material possesses excellent oxygen reduction electrocatalytic performance, high cycling stability, strong methanol tolerance under all pHs, and can be used as a fuel cell cathode oxygen reduction reaction electrocatalytic material. The present invention is low-cost and environmentally friendly, usable raw materials are wide-ranging, the preparation process is simple and highly effective, the invention can be used for large scale production, and the invention has highly valuable practical application.