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Characterization and Theory of Electrocatalysts Based on Scanning Electrochemical Microscopy Screening Methods

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Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, Texas 78712
Cite this: Langmuir 2006, 22, 25, 10426–10431
Publication Date (Web):September 27, 2006
Copyright © 2006 American Chemical Society

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    A strategy for finding new electrocatalysts for the oxygen reduction reaction (ORR) in acidic solutions is outlined and illustrated with results for Pd−Co catalysts. This is based on establishing guidelines for selecting test systems, rapid preparation of arrays, and rapid screening by scanning electrochemical microscopy. Promising candidates are further tested as supported electrocatalysts by larger scale electrochemical methods and in fuel cells, with optimization of the composition and structure. Those that emerge are characterized by a variety of methods, including X-ray diffraction, scanning electron microscopy, and X-ray photoemission spectroscopy. Finally, density functional theory is used for detailed calculations of oxygen adsorption and dissociation on the material and provides better guidelines for further testing.

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     Part of the Electrochemistry special issue.

     Current address:  Facultad de Ingeniería Química, Universidad Nacional del Litoral, Santa Fe, Argentina.


     To whom correspondence should be addressed.

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