Journal
RSC ADVANCES
Volume 3, Issue 26, Pages 10487-10496Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ra40920a
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- Grants-in-Aid for Scientific Research [13J05683] Funding Source: KAKEN
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Excellent oxygen reduction reaction (ORR) activity of Pt-based bimetallic alloys like CoPt and PdPt has been studied in detail. A simple solution-phase synthetic procedure for the bimetallic alloys of CoPt and PdPt is described here. This method, involving a single-step reaction, is believed to be suitable for large-scale synthesis of both monometallic and multimetallic nanocrystals with required size and shape. Among various catalyst compositions, Pd22Pt78 and Co15Pt85 catalysts have shown excellent ORR activity compared with Pt/C and commercial PtCo/C (PtCo/C(comm)) samples. At 0.9 V, Co15Pt85/C and Pd22Pt78/C exhibit mass activities with values similar to 3.8 times and similar to 2.1 times higher than that of Pt/C, and Co15Pt85/C exhibits 1.8 times higher activity than that of PtCo/C(comm). Quantification and the effect of surface-oxygenated species generated at higher potentials were studied by stripping voltammetry, in the form of total charge.
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