On the determination of platinum particle size in carbon-supported platinum electrocatalysts for fuel cell applications |
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| Authors: | D.A. Stevens Z. Chen |
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| Affiliation: | a Department of Physics, Sir James Dunn Building, Dalhousie University, Halifax, Nova Scotia B3H 3J5, Canada
b Department of Chemistry, Dalhousie University, Halifax, Nova Scotia B3H 3J5, Canada |
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| Abstract: | Using a conventional laboratory diffractometer, small angle X-ray scattering (SAXS) was used to determine the average platinum particle size in samples of carbon with a range of platinum loadings. The results obtained were compared with those obtained from wide-angle X-ray diffraction (WAXS) studies. SAXS was more effective than WAXS for determining the average platinum particle size in samples where the grains were so small that the resultant diffraction peaks in the WAXS profiles were too broad to accurately determine the peak width for use in the Scherrer equation. |
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| Keywords: | A. Carbon black B. Catalyst support C. Small angle X-ray scattering |
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