<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A new catalyst for the oxygen reduction reaction in fuel cells and metal—air batteries is prepared from aqueous solutions of carbonaceous nanofibers, pyrrole, and FeCl<sub>3</sub> (room temperature, 4 h, followed by pyrolysis under flowing N<sub>2</sub>).</p> </abstract>