物理化学学报 >> 2013, Vol. 29 >> Issue (04): 792-798.doi: 10.3866/PKU.WHXB201302221

催化和表面科学 上一篇    下一篇

热处理碳载Fe-三聚氰胺及Fe-g-C3N4催化剂的氧还原催化性能

李赏, 王家堂, 陈锐鑫, 赵伟, 钱柳, 潘牧   

  1. 武汉理工大学材料复合新技术国家重点实验室,武汉 430070
  • 收稿日期:2012-10-15 修回日期:2013-02-15 发布日期:2013-03-25
  • 通讯作者: 李赏 E-mail:lishang@whut.edu.cn
  • 基金资助:

    湖北省自然科学基金项目(2012FFB05106)和国家重点基础研究发展计划项目(973) (2012CB215504)资助

Catalytic Performance of Heat-Treated Fe-Melamine/C and Fe-g-C3N4/C Electrocatalysts for Oxygen Reduction Reaction

LI Shang, WANG Jia-Tang, CHEN Rui-Xin, ZHAO Wei, QIAN Liu, PAN Mu   

  1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China
  • Received:2012-10-15 Revised:2013-02-15 Published:2013-03-25
  • Supported by:

    The project was supported by the Natural Science Foundation of Hubei Province, China (2012FFB05106) and Major State Basic Research Development Program of China (973) (2012CB215504).

摘要:

分别以三聚氰胺和三聚氰胺的聚合物为配体, 采用浸渍法合成了两种氧还原反应(ORR)催化剂Fe-N/C(1)和Fe-N/C(2). 通过X射线衍射光谱(XRD)、X射线光电子能谱(XPS)、透射电子显微镜(TEM)和电化学测试对催化剂的成分、形貌和电催化性能进行了表征. 结果表明, 以三聚氰胺聚合物为配体制备的Fe-N/C具有更高的ORR催化活性. 在高温热处理过程中, 催化剂表面能形成更多的石墨N活性点, 是其ORR性能提高的重要原因.

关键词: 三聚氰胺, 非贵金属催化剂, 氧还原反应, 石墨N, 质子交换膜燃料电池

Abstract:

Melamine and its polymer (g-C3N4) were used as ligands to prepare Fe-N/C electrocatalysts for the oxygen reduction reaction (ORR) by an impregnation method. The composition, morphology and electrocatalytic activity of the catalysts were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and electrochemical measurements. The Fe-N/C catalyst using g-C3N4 as a complex ligand showed higher activity in the ORR than that with melamine. The formation of quaternary N active sites on the surface of the catalyst during heat treatment helps to improve their performance in the ORR.

Key words: Melamine, Non-noble metal electrocatalyst, Oxygen reduction reaction, Graphitic N, Proton exchange membrane fuel cell

MSC2000: 

  • O643