AHighly Nanoporous Nitrogen-Doped Carbon Microfiber Derived from Bioresource as a New Kind of ORR Electrocatalyst

作者：Guo, Chaozhong^*; Li, Yanrong; Xu, Ya; Xiang, Qin; Sun, Lingtao^*; Zhang, Weizhong; Li, Wensheng; Si, Yujun^*; Luo, Zhongli

来源：Nanoscale Research Letters, 2019, 14(1): 22.

DOI：10.1186/s11671-019-2854-9

• Nanoporous carbon
• Carbon microfiber
• Oxygen reduction reaction
• Electrocatalyst
• Bamboo-carbon biowaste

Synthesis of metal-free carbon-based electrocatalysts for oxygen reduction reaction (ORR) to replace the conventional platinum-based catalysts has currently become a hot topic of research. This work proposes an activation-assisted carbonization strategy for the fabrication of nitrogen-doped nanoporous carbon microfibers (Me-CFZ-900) with a high BET surface area (similar to 929.4m(2)g(-1)) via using melamine as a promoter/nitrogen source and bamboo-carbon biowastes as the carbon source with the help of a zinc chloride activator. Electrochemical tests showed that the Me-CFZ-900 material has exhibited excellent ORR electrocatalytic activity and long-term stability, and also displayed a quasi-four-electron ORR pathway in alkaline electrolyte. We also find that the graphitic-N may be the catalytically active site for the ORR, but the formation of planar-N can further help to promote the ORR activity for our catalysts. The results open a new space and provide a new idea to prepare valuable porous nanocarbon materials on the basis of carbonaceous solid wastes for catalysis of a wide range of electrochemical reactions in the future.

• 出版日期2019-1-15
• 单位重庆大学; 重庆理工大学; 武汉工程大学; 四川轻化工大学; 重庆文理学院; 湖北大学; 重庆医科大学