首页 | 本学科首页   官方微博 | 高级检索  
     


Cobalt oxyphosphide as oxygen reduction electrocatalyst in proton exchange membrane fuel cell
Authors:Meiri WangHuamin Zhang  Hexiang ZhongYuanwei Ma
Affiliation:a Proton Exchange Membrane Fuel Cell Key Materials and Technology Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
b Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
Abstract:The cobalt oxyphosphides supported on carbon black were prepared using incipient wetness method and characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The possibility of their application as the electrocatalyst for oxygen reduction reaction (ORR) in proton exchange membrane fuel cell (PEMFC) was investigated and the electrocatalytic activities were evaluated by the electrochemical measurements and single cell test, respectively. The electrocatalyst presents attractive catalytic activity towards ORR and good stability in acid media and exhibits an onset potential for oxygen reduction as high as 0.69 V (RHE) in H2SO4 solution. The maximum power density obtained in a H2/O2 PEMFC is 57 mW cm−2 with Co4P2O9/C loading of 1.13 mg cm−2. No significant performance degradation is observed over 50 h of continuous fuel cell operation. The combination of heteroatom P with nanostructured oxides with high stability, excellent functionality and low cost which are prerequisites for large-scale applications, probably provide a new solution for the critical challenge of finding effective cathode materials for PEMFC.
Keywords:Proton exchange membrane fuel cell   Oxygen reduction reaction   Pt-free electrocatalyst   Cobalt oxyphosphide
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号