Nafion derived platinum nanoparticles were produced and successfully anchored on titanium nitride
(TiN) support (Pt/TiN) and its suitability for phosphoric acid based polymer electrolyte membrane fuel
cells is reported. Electrochemical cycling of Nafion stabilised Pt/TiN electrocatalyst exhibits good stability,
durability and better electrocatalytic activity than the traditionally employed carbon supported Pt (Pt/C).
Platinum supported on TiN exhibits better oxygen reduction reaction (ORR) activity as compared to carbon
black (Vulcan XC 72). Nafion stabilised Pt/TiN shows a positive shift of 20 mV in half-wave potential
measured from ORR polarisation curve in relation to Pt/C. Nafion stabilised Pt/TiN shows approximately
two-fold increase in mass and specific activities than the Pt/C calculated from ORR data at 0.9 V. The
improved durability of Pt/TiN catalyst arises from Nafion layer surrounding the Pt nanoparticles and corrosion
resistant TiN support. Transition metal nitride based electrocatalysts are more active for cathode
due to synergistic effect, which is observed in oxygen reduction reaction.