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Porous Pd layer-coated au nanoparticles supported on carbon: Synthesis and electrocatalytic activity for oxygen reduction in acid media

Title
Porous Pd layer-coated au nanoparticles supported on carbon: Synthesis and electrocatalytic activity for oxygen reduction in acid media
Authors
Shim J.H.Kim J.Lee C.Lee Y.
Ewha Authors
이종목이영미심준호
SCOPUS Author ID
이종목scopus; 이영미scopus
Issue Date
2011
Journal Title
Chemistry of Materials
ISSN
0897-4756JCR Link
Citation
vol. 23, no. 21, pp. 4694 - 4700
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
This paper reports the simple synthesis and characterization of carbon-supported Pd layer-coated Au nanoparticles (AuPd/C). A series of AuPd/C with various Pd/Au weight percentage ratios were prepared by the spontaneous deposition of a Pd shell on a Au nanoparticle core using different Pd precursor concentrations (0.5, 5, 10, 20 mM PdCl2). Au nanospheres encapsulated by the porous Pd shells are confirmed by transmission electron microscopy (TEM), UV-vis absorption spectroscopy, and scanning TEM. The catalytic activity of the AuPd/C for the oxygen reduction reaction (ORR) was investigated by rotating disk electrode voltammetry in 0.5 M H2SO4. In particular, a AuPd/C with a Pd/Au ratio of 0.61 shows superior ORR activity along with satisfactory stability and methanol tolerance under acidic conditions. © 2011 American Chemical Society.
DOI
10.1021/cm2012044
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자연과학대학 > 화학·나노과학전공 > Journal papers
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