Pt/Modified MWNT as Electrocatalysts for High Temperature PEM Fuel Cells

A new approach towards the development of electrocatalytic layers for use in high temperature PEM fuel cells is reported. Modified carbon nanotubes (CNTs) were used as the support. The aim was to achieve a uniform distribution of polar groups, which can interact with phosphoric acid, on the surface of the modified carbon support. MWNTs were selected due to their unique properties and were surface modified introducing pyridine based groups on the side walls. The different supports were thoroughly characterized by means of relevant techniques. Platinum was deposited on the new carbon supports resulting in the newly synthesized catalysts. Initial measurements of the catalytic activity towards oxygen reduction were performed in order to evaluate the potential use of these materials as catalytic layers in HT PEMFCs.