Ternary PtSnRh-SnO2 Nanoclusters: Synthesis and Electroactivity for Ethanol Oxidation Fuel Cell Reaction
Carbon supported ternary Pt{sub 52}Sn{sub (36-x)}Rh{sub 12}-Sn{sub x}O{sub 2x} 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 SnO{sub 2} throughout the catalyst. The Pt{sub 52}Sn{sub (36-x)}Rh{sub 12}-Sn{sub x}O{sub 2x} 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 Pt{sub 52}Sn{sub (36-x)}Rh{sub 12}-Sn{sub x}O{sub 2x} might result from the electronic effect of the Pt/Sn/Rh random alloy.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE SC OFFICE OF SCIENCE (SC)
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 1042158
- Report Number(s):
- BNL-97836-2012-JA; JMACEP; TRN: US201212%%569
- Journal Information:
- Journal of Materials Chemistry, Vol. 21, Issue 24; ISSN 0959-9428
- Country of Publication:
- United States
- Language:
- English
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