氮掺杂碳纳米片载钴催化剂的制备及其对硼氢化钠的电催化氧化  

Preparation of Co/NCN catalyst and its electro-oxidation of NaBH4

作　　者：罗明洪[1] 刘卫红 Luo Minghong;Liu Weihong(College of Chemistry and Food Science,Nanchang Normal University,Nanchang 330023)

机构地区：[1]南昌师范学院化学与食品科学学院,南昌330023

出　　处：《化工新型材料》2022年第8期282-286,共5页New Chemical Materials

基　　金：国家自然科学基金(21763019);江西省教育厅科技项目(GJJ202614);南昌师范学院学生科研项目(19XSKY47)。

摘　　要：首先以尿素为原料通过高温煅烧得到氮掺杂碳纳米片(NCN),然后采用浸渍还原法制备了氮掺杂碳纳米片载钴催化剂(Co/NCN)。通过扫描电镜、透射电镜、选区电子衍射等手段对NCN进行表征,发现NCN具有片层结构。通过透射电镜、能量色散X射线光谱、X射线光电子能谱对Co/NCN进行了表征,结果表明制备了Co/NCN。利用循环伏安法(CV)、计时电流法(CA)对催化剂的电化学性能进行了测试,同时对比了Co/NCN催化剂与石墨烯载钴催化剂、氮掺杂石墨烯载钴催化剂的催化性能,结果表明,Co/NCN催化剂对硼氢化钠的电催化氧化具有最好的催化活性和稳定性,在直接硼氢化钠燃料电池领域具有广阔的应用前景。First, nitrogen-doped carbon nanosheets(NCN) were prepared by calcination of urea.Then, the nitrogen-doped carbon nanosheets supported cobalt catalyst(Co/NCN) was prepared by impregnation reduction method.The morphology of NCN was characterized by scanning electron microscopy, transmission electron microscopy, selected area electron diffraction, and so on.It was found that NCN had lamellar structure.Co/NCN was characterized by transmission electron microscopy, energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy, and the results showed that Co/NCN was successfully prepared.The electrochemical performance of the catalyst was tested by cyclic voltammetry(CV) and chronoamperometry(CA),and the catalytic performance of the Co/NCN catalyst was compared with that of graphene supported cobalt catalyst and nitrogen doped graphene supported cobalt catalyst.The results shown that the Co/NCN catalyst had bestcatalytic activity and stability for the electrocatalytic oxidation of sodium borohydride(NaBH),and had broad application prospects in the field of direct NaBHfuel cell.

关 键 词：氮掺杂碳纳米片 钴 硼氢化钠 阳极 电催化氧化 

分 类 号：TQ152[化学工程—电化学工业]