Effects of catalyst aging on the growth morphology and oxygen reduction activity of nitrogen-doped carbon nanotubes

This work reports some effects that aging time of the used catalyst (Fe/MgO) has on the produced N-doped carbon nanotubes. In particular, the catalyst age affects the synthesized nanomaterials with respect to morphology, surface composition and electrocatalytic behavior towards the electrochemical oxygen reduction. (C) 2014 Elsevier B.V. All rights reserved.