Oxygen Reduction on TiO_2-Coated Carbon Nanofibers Decorated with Graphene Platelets

摘要

The oxygen reduction reaction (ORR) was studied on heat-treated electrospun polyacrylonitrile (PAN) nanofibers with and without iron (Ⅱ) phthalocyanine using rotating ring disk electrode voltammetry. In an effort to mitigate loss of the active sites and increase durability, atomic layer deposition was used to coat the nanofibers with TiO_2 thin films. The results show that Fe-containing heat-treated nanofibers and TiO_2-coated Fe-containing nanofibers exhibit a ～4-electron reduction of O_2 with low % H_2O_2 yields (～1-1.5%).