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Mixed-Metal Pt Monolayer Electrocatalysts with Improved CO Tolerance.

Using a combination of periodic, self-consistent, density functional theory (DFT) calculations and CO-stripping voltammetry experiments, we have designed a new class of Pt-M bimetallic monolayer catalysts supported on a non-Pt metal, which exhibit improved stability against CO poisoning and might be...

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Published in:Journal of the American Chemical Society Vol. 133; no. 46; pp. 18574 - 18577
Main Authors: Nilekar, Anand Udaykumar, Sasaki, Kotaro, Farberow, Carrie A., Adzic, Radoslav R., Mavrikakis, Manos
Format: Article
Published: American Chemical Society 11/23/2011
Subjects:
Monomolecular films
Electrocatalysis
Density functionals
Voltammetry
Catalysts
Oxidation
Online Access:View this record in EBSCOhost
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      dt: 11/23/2011
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      pub: American Chemical Society
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        10.1021/ja2072675
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        atl: Mixed-Metal Pt Monolayer Electrocatalysts with Improved CO Tolerance.
      aug:
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          Nilekar, Anand Udaykumar
          Sasaki, Kotaro
          Farberow, Carrie A.
          Adzic, Radoslav R.
          Mavrikakis, Manos
        affil:
          Department of Chemical & Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
          Chemistry Department, Building 555, Brookhaven National Laboratory, Upton, New York 11973, United States
      su:
        Monomolecular films
        Electrocatalysis
        Density functionals
        Voltammetry
        Catalysts
        Oxidation
      sug:
        subj:
          Monomolecular films
          Electrocatalysis
          Density functionals
          Voltammetry
          Catalysts
          Oxidation
      ab: Using a combination of periodic, self-consistent, density functional theory (DFT) calculations and CO-stripping voltammetry experiments, we have designed a new class of Pt-M bimetallic monolayer catalysts supported on a non-Pt metal, which exhibit improved stability against CO poisoning and might be suitable for proton-exchange membrane fuel cell anodes. These surfaces help in reducing the overpotential associated with anodic CO oxidation and minimize the amount of Pt used, thereby reducing materials cost. DFT calculations predict highly repulsive interactions between adsorbed CO molecules on these surfaces, leading to weaker binding and lower coverage of CO than on pure Pt, which in turn facilitates oxidative removal of CO from these catalytic surfaces.
      pubtype: Academic Journal
      doctype: Article
      src: R
    language: English
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