Nitrogen doped carbon nanotubes and their impact on the oxygen reduction reaction in fuel cells

Nitrogen doped carbon nanotubes (N-CNTs) with different nitrogen contents were synthesized as non-precious catalysts for oxygen reduction reaction (ORR) through varying the relative amount of pyridine and ethanol in the stock solution. The structural and chemical properties of the N-CNTs were investigated using scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. The characterizations indicated …