Recent advances in platinum monolayer electrocatalysts for oxygen reduction reaction: Scale-up synthesis, structure and activity of Pt shells on Pd cores

K. Sasaki; J. X. Wang; H. Naohara; N. Marinkovic; K. More; H. Inada; R. R. Adzic

doi:10.1016/j.electacta.2009.11.106

Recent advances in platinum monolayer electrocatalysts for oxygen reduction reaction: Scale-up synthesis, structure and activity of Pt shells on Pd cores

K. Sasaki, J. X. Wang, H. Naohara, N. Marinkovic, K. More, H. Inada, R. R. Adzic

Center for Nanophase Matls Sciences

Research output: Contribution to journal › Article › peer-review

263 Scopus citations

Abstract

We have established a scale-up synthesis method to produce gram-quantities of Pt monolayer electrocatalysts. The core-shell structure of the Pt/Pd/C electrocatalyst has been verified using the HAADF-STEM Z-contrast images, STEM/EELS, and STEM/EDS line profile analysis. The atomic structure of this electrocatalyst and formation of a Pt monolayer on Pd nanoparticle surfaces were examined using in situ EXAFS. The Pt mass activity of the Pt/Pd/C electrocatalyst for ORR is considerably higher than that of commercial Pt/C electrocatalysts. The results with Pt monolayer electrocatalysts may significantly impact science of electrocatalysis and fuel-cell technology, as they have demonstrated an exceptionally effective way of using Pt that can resolve problems of other approaches, including electrocatalysts' inadequate activity and high Pt content.

Original language	English
Pages (from-to)	2645-2652
Number of pages	8
Journal	Electrochimica Acta
Volume	55
Issue number	8
DOIs	https://doi.org/10.1016/j.electacta.2009.11.106
State	Published - Mar 1 2010

Funding

This work is supported by U.S. Department of Energy , Divisions of Chemical and Material Sciences under the Contract No. DE-AC02-98CH10886 , and Toyota Motor Corporation under the CRADA No. BNL-C-05-09 . The authors thank A.I. Frenkel for helpful discussion of the EXAFS analysis.

Keywords

Electrocatalysis
Fuel cells
Oxygen reduction
Platinum

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10.1016/j.electacta.2009.11.106

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title = "Recent advances in platinum monolayer electrocatalysts for oxygen reduction reaction: Scale-up synthesis, structure and activity of Pt shells on Pd cores",

abstract = "We have established a scale-up synthesis method to produce gram-quantities of Pt monolayer electrocatalysts. The core-shell structure of the Pt/Pd/C electrocatalyst has been verified using the HAADF-STEM Z-contrast images, STEM/EELS, and STEM/EDS line profile analysis. The atomic structure of this electrocatalyst and formation of a Pt monolayer on Pd nanoparticle surfaces were examined using in situ EXAFS. The Pt mass activity of the Pt/Pd/C electrocatalyst for ORR is considerably higher than that of commercial Pt/C electrocatalysts. The results with Pt monolayer electrocatalysts may significantly impact science of electrocatalysis and fuel-cell technology, as they have demonstrated an exceptionally effective way of using Pt that can resolve problems of other approaches, including electrocatalysts' inadequate activity and high Pt content.",

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T2 - Scale-up synthesis, structure and activity of Pt shells on Pd cores

AU - Sasaki, K.

AU - Wang, J. X.

AU - Naohara, H.

AU - Marinkovic, N.

AU - More, K.

AU - Inada, H.

AU - Adzic, R. R.

PY - 2010/3/1

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N2 - We have established a scale-up synthesis method to produce gram-quantities of Pt monolayer electrocatalysts. The core-shell structure of the Pt/Pd/C electrocatalyst has been verified using the HAADF-STEM Z-contrast images, STEM/EELS, and STEM/EDS line profile analysis. The atomic structure of this electrocatalyst and formation of a Pt monolayer on Pd nanoparticle surfaces were examined using in situ EXAFS. The Pt mass activity of the Pt/Pd/C electrocatalyst for ORR is considerably higher than that of commercial Pt/C electrocatalysts. The results with Pt monolayer electrocatalysts may significantly impact science of electrocatalysis and fuel-cell technology, as they have demonstrated an exceptionally effective way of using Pt that can resolve problems of other approaches, including electrocatalysts' inadequate activity and high Pt content.

AB - We have established a scale-up synthesis method to produce gram-quantities of Pt monolayer electrocatalysts. The core-shell structure of the Pt/Pd/C electrocatalyst has been verified using the HAADF-STEM Z-contrast images, STEM/EELS, and STEM/EDS line profile analysis. The atomic structure of this electrocatalyst and formation of a Pt monolayer on Pd nanoparticle surfaces were examined using in situ EXAFS. The Pt mass activity of the Pt/Pd/C electrocatalyst for ORR is considerably higher than that of commercial Pt/C electrocatalysts. The results with Pt monolayer electrocatalysts may significantly impact science of electrocatalysis and fuel-cell technology, as they have demonstrated an exceptionally effective way of using Pt that can resolve problems of other approaches, including electrocatalysts' inadequate activity and high Pt content.

KW - Electrocatalysis

KW - Fuel cells

KW - Oxygen reduction

KW - Platinum

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JO - Electrochimica Acta

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ER -

Recent advances in platinum monolayer electrocatalysts for oxygen reduction reaction: Scale-up synthesis, structure and activity of Pt shells on Pd cores

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