氮/硫双掺多孔碳负载Fe_9S_(10)纳米粒子的氧还原电催化性能

Electrocatalytic Performance of Fe_9S_(10) Nanoparticles Loaded Nitrogen and Sulphur Codoped Porous Carbon for Oxygen Reduction Reaction

通过简单热解后酸刻蚀方法制备了一种新型的氮/硫双掺的多孔碳负载Fe_9S_(10)纳米粒子(Fe_9S_(10)/NSPC)复合材料.采用X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)和X射线光电子能谱(XPS)等方法对催化剂的结构形貌和化学成分进行了表征,用旋转圆盘(RDE)和旋转环盘(RRDE)技术对其氧还原催化性能进行了探究.结果表明,Fe_9S_(10)/NSPC-900(900℃为热解温度)在碱性介质中展现出了较高的氧还原催化活性及良好的稳定性和优异的抗甲醇性能.

A novel hybrid material（ Fe9S10/NSPC） comprising of Fe9S10 nanocrystals and nitrogen/sulphurcodoped porous carbon（ NSPC） was synthesized via a facile pyrolysis procedure followed by an acid leaching process. X-Ray diffraction（ XRD）,scanning electron microscope（ SEM）,transmission electron microscope（ TEM） and X-ray photoelectron spectroscopy（ XPS） techniques were used to characterized the crystal phase structure,morphology and chemical composition of the as-obtained catalysts, respectively. In addition,rotating disk electrode（ RDE） and rotating ring-disk electrode（ RRDE） techniques were conducted to evoluate the electrocatalytic activity of the catalysts for oxygen reduction reaction（ ORR）. The results show that the Fe9S10/NSPC-900（ where 900 ℃ represents the pyrolysis temperature） exhibits high ORR activity,good stability and excellent methanol resistance in an alkaline medium.