Ultra-low platinum content fuel cell anode electrocatalyst with a long-term performance stability

K. Sasaki; J. X. Wang; M. Balasubramanian; J. McBreen; F. Uribe; R. R. Adzic

doi:10.1016/j.electacta.2004.01.086

Ultra-low platinum content fuel cell anode electrocatalyst with a long-term performance stability

K. Sasaki, J. X. Wang, M. Balasubramanian, J. McBreen, F. Uribe, R. R. Adzic

Emerging and Solid-State Batteries

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129 Scopus citations

Abstract

An active anode electrocatalyst, consisting of 1/8 of a monolayer of Pt on a surface of carbon-supported Ru nanoparticles, has been shown to exhibit excellent long-term performance stability in an operating fuel cell. The electrocatalyst has the reduced susceptibility to poisoning by CO, which, in addition to the strong segregation of the Pt atoms on the Ru substrate, determines this characteristic. Kinetic parameters were determined by electrochemical techniques using thin-film rotating disk electrodes. X-ray absorption spectroscopy near edge structure was used to determine the d-band vacancies of a Pt submonolayer on a surface of carbon-supported Ru nanoparticles, and to relate it to the bonding strength of CO. The data point the way to ultimately reduce Pt content in anode electrocatalysts while maintaining their high activity and thereby alleviating the problem of high Pt loading in existing fuel cell technology.

Original language	English
Pages (from-to)	3873-3877
Number of pages	5
Journal	Electrochimica Acta
Volume	49
Issue number	22-23 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.electacta.2004.01.086
State	Published - Sep 15 2004

Funding

This work is supported by US Department of Energy, Divisions of Chemical and Material Sciences, under the Contract No. DE-AC02-98CH10886.

Keywords

CO tolerance
Fuel cells
H oxidation
Pt monolayer
Ru nanoparticles

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10.1016/j.electacta.2004.01.086

Cite this

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abstract = "An active anode electrocatalyst, consisting of 1/8 of a monolayer of Pt on a surface of carbon-supported Ru nanoparticles, has been shown to exhibit excellent long-term performance stability in an operating fuel cell. The electrocatalyst has the reduced susceptibility to poisoning by CO, which, in addition to the strong segregation of the Pt atoms on the Ru substrate, determines this characteristic. Kinetic parameters were determined by electrochemical techniques using thin-film rotating disk electrodes. X-ray absorption spectroscopy near edge structure was used to determine the d-band vacancies of a Pt submonolayer on a surface of carbon-supported Ru nanoparticles, and to relate it to the bonding strength of CO. The data point the way to ultimately reduce Pt content in anode electrocatalysts while maintaining their high activity and thereby alleviating the problem of high Pt loading in existing fuel cell technology.",

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AU - Sasaki, K.

AU - Wang, J. X.

AU - Balasubramanian, M.

AU - McBreen, J.

AU - Uribe, F.

AU - Adzic, R. R.

PY - 2004/9/15

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N2 - An active anode electrocatalyst, consisting of 1/8 of a monolayer of Pt on a surface of carbon-supported Ru nanoparticles, has been shown to exhibit excellent long-term performance stability in an operating fuel cell. The electrocatalyst has the reduced susceptibility to poisoning by CO, which, in addition to the strong segregation of the Pt atoms on the Ru substrate, determines this characteristic. Kinetic parameters were determined by electrochemical techniques using thin-film rotating disk electrodes. X-ray absorption spectroscopy near edge structure was used to determine the d-band vacancies of a Pt submonolayer on a surface of carbon-supported Ru nanoparticles, and to relate it to the bonding strength of CO. The data point the way to ultimately reduce Pt content in anode electrocatalysts while maintaining their high activity and thereby alleviating the problem of high Pt loading in existing fuel cell technology.

AB - An active anode electrocatalyst, consisting of 1/8 of a monolayer of Pt on a surface of carbon-supported Ru nanoparticles, has been shown to exhibit excellent long-term performance stability in an operating fuel cell. The electrocatalyst has the reduced susceptibility to poisoning by CO, which, in addition to the strong segregation of the Pt atoms on the Ru substrate, determines this characteristic. Kinetic parameters were determined by electrochemical techniques using thin-film rotating disk electrodes. X-ray absorption spectroscopy near edge structure was used to determine the d-band vacancies of a Pt submonolayer on a surface of carbon-supported Ru nanoparticles, and to relate it to the bonding strength of CO. The data point the way to ultimately reduce Pt content in anode electrocatalysts while maintaining their high activity and thereby alleviating the problem of high Pt loading in existing fuel cell technology.

KW - CO tolerance

KW - Fuel cells

KW - H oxidation

KW - Pt monolayer

KW - Ru nanoparticles

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Ultra-low platinum content fuel cell anode electrocatalyst with a long-term performance stability

Abstract

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Keywords

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