三聚氰胺衍生的高石墨氮中空管状Fe-N/C催化碱性氧还原反应  

Melamine-derived high-graphite nitrogen hollow tubular Fe-N/C catalyzed alkaline oxygen reduction reaction

作　　者：赵晓琦 李晶 张雪[1,2] 李盈霄 高艳芳 刘玲[1,2] ZHAO Xiaoqi;LI Jing;ZHANG Xue;LI Yingxiao;GAO Yanfang;LIU Ling(School of Chemical Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Engineering Research Center of Large-scale Energy Storage Technology,Inner Mongolia University of Technology,Hohhot 010051,China)

机构地区：[1]内蒙古工业大学化工学院,呼和浩特010051 [2]内蒙古工业大学大规模储能技术教育部工程研究中心,呼和浩特010051

出　　处：《内蒙古工业大学学报（自然科学版）》2023年第4期309-317,共9页Journal of Inner Mongolia University of Technology：Natural Science Edition

基　　金：国家自然科学基金项目(21566030);内蒙古自治区自然科学基金项目(2015MS0205);2021年科研启动金项目(DC2200000899)。

摘　　要：以煅烧三聚氰胺后形成的C3N4材料为氮源,柠檬酸为碳源,六水合三氯化铁为铁源,通过两步法合成FeN/C催化剂,并考察该催化剂对氧还原反应的电催化能力。采用XRD、SEM、Raman、XPS等表征手段对Fe-N/C催化剂的晶体结构和元素化学状态进行综合评价;以CV和LSV等电化学测试手段探究Fe-N/C催化剂的氧还原电催化能力。研究结果表明,Fe-N/C催化剂具有管状形貌、较高的石墨氮含量和较佳的氧还原电催化能力。通过对电化学性能关键参数进行分析发现,Fe-N/C催化剂的起始电位是1.071 V vs. RHE,半波电位是0.911 V vs. RHE,极限电流密度是5.943 mA/cm2。Fe-N/C catalyst was synthesized by two-step method using C3N4 material formed after calcining melamine as nitrogen source,citric acid as carbon source and ferric chloride hexahydrate as iron source,and the electrocatalytic ability of the catalyst for oxygen reduction reaction was investigated.The crystal structure and elemental chemical state of Fe-N/C catalyst were comprehensively evaluated by X-ray diffraction(XRD),scanning electron microscopic(SEM),Raman and X-ray photoelectron spectroscopy(XPS).The electrocatalytic ability of Fe-N/C catalyst for oxygen reduction reaction was investigated by electrochemical tests such as Cyclic Voltammetry(CV)and linear sweep voltammetry(LSV).The results showed the tubular morphology,higher graphite nitrogen content and better electrocatalytic ability for oxygen reduction reaction of Fe-N/C catalyst.By analyzing the key parameters of electrochemical performance,it was found that the onset potential of Fe-N/C catalyst was 1.071 V vs.RHE,the half-wave potential was 0.911 V vs.RHE,and the limiting current density was 5.943 mA/cm2.

关 键 词：氧还原反应 燃料电池 Fe-N/C催化剂 空心管电催化剂 氮掺杂碳 

分 类 号：O646[理学—物理化学]