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Tailoring the Selectivity and Stability of Chemically Modified Platinum Nanocatalysts To Design Highly Durable Anodes for PEM Fuel Cells


  • This work was supported by the Director, Office of Science, Office of Basic Energy Sciences, Division of Materials Sciences, US Department of Energy under Contract No. DE-AC03-76SF00098 and the Center of Excellence Low Carbon Technologies Slovenia (CO NOT), Center of Excellence Advanced Materials and Technologies for the Future Slovenia (CO NAMASTE). R.S. is grateful for financial support from an Argonne postdoctoral fellowship. PEM=Proton-exchange membrane.


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Big and small: Chemically modifying platinum with calix[4]arene yields a highly stable anode catalyst that effectively suppresses the oxidation reduction reaction without altering the maximum activity for the hydrogen oxidation reaction (see picture, Pt blue, C gray, O red, S yellow). This behavior extends from long-range-ordered stepped single-crystal surfaces to nanocatalysts.