V. Stamenkovic, N. Markovic, D. Li, D. Strmcnik
Argonne National Laboratory,
Keywords: Pt alloys, nanoparticles, oxygen reduction reaction
Summary:The major barriers to broad commercialization of fuel cell technology are the cost, performance and durability of currently employed materials. Improvements in materials design at atomic-molecular level can bring substantial change in their functional properties . Our work has demonstrated that tuning of surface and bulk properties of catalytic materials such as composition, morphology and electronic structure are critical to achieving unique performance. An increase in catalytic activity of almost two orders of magnitude was reported for well-ordered single crystalline surfaces of Pt-alloys compared to conventional Pt/C catalysts. This finding had led nanoscale catalyst design aimed to synthesize more active and durable catalysts. The signature of our approach is given as a synergy between well-defined systems and novel nanomaterials with carefully tuned architecture that has been incorporated in different supports. The variety of systems with superior catalytic properties for fuel cell reactions that have evolved from our approach will be presented.