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Title: Pt-decorated pdfe nanoparticles as methanol-tolerant oxygen reduction electrocatalyst
Authors: Yang, J.
Zhou, W. 
Cheng, C.H.
Lee, J.Y. 
Liu, Z.
Keywords: Core shell nanoparticles
Direct methanol fuel cells
Galvanic replacement reaction
Oxygen reduction reaction
Issue Date: 27-Jan-2010
Citation: Yang, J., Zhou, W., Cheng, C.H., Lee, J.Y., Liu, Z. (2010-01-27). Pt-decorated pdfe nanoparticles as methanol-tolerant oxygen reduction electrocatalyst. ACS Applied Materials and Interfaces 2 (1) : 119-126. ScholarBank@NUS Repository.
Abstract: The activity and selectivity of carbon-supported Pt-decorated PdFe nanoparticles in the oxygen reduction reaction (ORR) were investigated in the presence and absence of methanol. The Pt-decorated PdFe nanoparticles, which consist of a PdPt surface and a PdFe interior, were prepared by the galvanic reaction between PdFe/C alloy nanoparticles and PtCl 4 2- in aqueous solution. The presence of a Pt-enriched surface after the replacement reaction was independently confirmed by several microstructural characterization techniques and cyclic voltammetry. The catalyst with such heterogeneous architecture is catalytically more active than a bulk PdFePt alloy catalyst with the same overall composition. The observed enhancements in catalyst performance can be attributed to the lattice strain effect between the shell and core components. The Pt-decorated PdFe (PdFe@PdPt/C) catalyst also compares favorably with a commercial Pt/C catalyst with four times as much Pt in terms of ORR activity, cost, and methanol tolerance. © 2010 American Chemical Society.
Source Title: ACS Applied Materials and Interfaces
ISSN: 19448244
DOI: 10.1021/am900623e
Appears in Collections:Staff Publications

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