Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 21, Issue 24, Pages 8887-8892Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0jm04358c
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Funding
- UNH
- DOE [DE-FG02-03ER15476, DE-AC02-98CH10886]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-98CH10886]
- Synchrotron Catalysis Consortium [DE-FG02-05ER15688]
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Carbon supported ternary Pt52Sn(36-x)Rh12-SnxO2x electrocatalysts with the average diameter of 2.8 +/- 0.5 nm were synthesized using a Polyol process followed by thermal treatment. Several techniques including high resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD) and extended X-ray absorption fine structure (EXAFS) were used to identify the coexistence of homogeneously distributed Pt/Sn/Rh random alloy and non-alloyed SnO2 throughout the catalyst. The Pt52Sn(36-x)Rh12-SnxO2x catalyst showed a superior long-term activity and stability towards ethanol oxidation than the commercial Pt catalyst. Our data of ternary Pt/Sn/Rh catalysts with different chemical compositions and crystalline structures also indicated that the superior performance of Pt52Sn(36-x)Rh12-SnxO2x might result from the electronic effect of the Pt/Sn/Rh random alloy.
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