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Title: Carbon-supported pseudo-core-shell pd-pt nanoparticles for ORR with and without methanol
Authors: Yang, J.
Lee, J.Y. 
Zhang, Q. 
Zhou, W. 
Liu, Z.
Issue Date: 2008
Citation: Yang, J., Lee, J.Y., Zhang, Q., Zhou, W., Liu, Z. (2008). Carbon-supported pseudo-core-shell pd-pt nanoparticles for ORR with and without methanol. Journal of the Electrochemical Society 155 (7) : B776-B781. ScholarBank@NUS Repository.
Abstract: Carbon-supported Pd-rich pseudo-core-shell Pd-Pt (Pd@Pt/C) nanoparticles, with Pt coverage close to a monolayer, were prepared from a simple galvanic replacement reaction between Pd/C particles and PtCl 4 2- at 100°C. The pseudo-core-shell architecture was confirmed by extensive microstructural characterization techniques. The binding energy shifts in the Pt 4f X-ray photoelectron spectra, in particular, suggest an electron exchange between Pd and Pt, and possible strain effects in Pt caused by the underlying Pd core. The activity of the pseudo-core-shell nanoparticles in the oxygen reduction reaction (ORR) was studied in acidic solutions with and without methanol. The electrocatalysts prepared as such were active for ORR at room temperature, even in the presence of 0.1 M methanol. The pseudo-core-shell Pd70 @ Pt30 catalyst, in particular, compared rather favorably with a Pt/C catalyst with twice the Pt mass loading in terms of the ORR activity, cost, and methanol tolerance. © 2008 The Electrochemical Society.
Source Title: Journal of the Electrochemical Society
ISSN: 00134651
DOI: 10.1149/1.2926609
Appears in Collections:Staff Publications

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