| 초록 |
A proton exchange membrane fuel cell (PEMFC) has been attracted great attention as an alternative power source owing to its low pollutant emission and high efficiency. Although the state-of-the-art oxygen reduction reaction (ORR) catalyst is based on Pt, the cost and scarcity of Pt require an alternative catalyst to reduce or eliminate the Pt usage. Thus, researchers have focused on the development of non-precious metal catalysts (NPMCs). Among the NPMCs, nitrogen-doped carbon materials have shown promising ORR activity. Moreover, additional doping of other heteroatoms has been implemented to enhance the ORR activity. In this paper, the cobalt encased nitrogen and sulfur co-doped carbon nanotubes (Co-NSTs) were synthesized by simple and scalable pyrolysis procedure. Their physical and electrochemical characteristics were thoroughly examined to explore the possibilities for the ORR catalysts. |
