N, S-Codoped Mesoporous Carbon Derived from Protic Salt for Oxygen Reduction Reaction.

Nitrogen/sulfur-codoped mesoporous carbon (CMK-3P) was readily prepared through direct carbonization of a protic salt [Phen][2HSO₄] in the presence of pristine SBA-15 template without the use of acid or metal catalysts for prepolymerization. CMK-3P is characteristic of the presence of large mesopores and even macropores caused by the curved and intertwined nanorods, high surface area (1030 m² g^-1), large pore volume (2.403 cm³ g^-1) and high nitrogen (6.0 at%) and sulfur (0.61 at%) contents. These characteristics make CMK-3P as an efficient metal-free catalyst for oxygen reduction reaction. [ABSTRACT FROM AUTHOR]