Characterization of Pt-​based catalyst materials by voltammetric techniques

U Koponen; H Kumpulainen; Mikael Bergelin; J Keskinen; T Peltonen; M Valkiainen; Mikael Wasberg

doi:10.1016/S0378-7753(03)00079-X

Characterization of Pt-based catalyst materials by voltammetric techniques

U Koponen, H Kumpulainen, Mikael Bergelin, J Keskinen, T Peltonen, M Valkiainen, Mikael Wasberg

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

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Abstract

Catalyst materials in inks, in half-MEAs and in a polymer electrolyte membrane (PEM) fuel cell were characterized by cyclic voltammetry. Lab.-made Pt inks were modified with Ru, Os and Ru+Ir and the MeOH oxidn. activity of the created surfaces was tested. A novel electrode, which enables the study of the O redn. reaction on the cathode was introduced. With this measuring device it was possible to vary the O content on the ink side and the p activity of the electrolyte on the membrane side of a half-MEA. Catalyst layers based on Pt, Pt-Ru and Pt-Co inside a PEM-unit cell were also characterized in situ by cyclic voltammetry. The active surface areas are linearly dependent on the Pt mass d. in the catalyst layers. Approx. 30% of the Pt loading in the MEA was electroactive.

Original language	Undefined/Unknown
Pages (from-to)	325–333
Journal	Journal of Power Sources
Volume	118
Issue number	1-2
DOIs	https://doi.org/10.1016/S0378-7753(03)00079-X
Publication status	Published - 2003
MoE publication type	A1 Journal article-refereed

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10.1016/S0378-7753(03)00079-X

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title = "Characterization of Pt-based catalyst materials by voltammetric techniques",

abstract = "Catalyst materials in inks, in half-MEAs and in a polymer electrolyte membrane (PEM) fuel cell were characterized by cyclic voltammetry. Lab.-made Pt inks were modified with Ru, Os and Ru+Ir and the MeOH oxidn. activity of the created surfaces was tested. A novel electrode, which enables the study of the O redn. reaction on the cathode was introduced. With this measuring device it was possible to vary the O content on the ink side and the p activity of the electrolyte on the membrane side of a half-MEA. Catalyst layers based on Pt, Pt-Ru and Pt-Co inside a PEM-unit cell were also characterized in situ by cyclic voltammetry. The active surface areas are linearly dependent on the Pt mass d. in the catalyst layers. Approx. 30% of the Pt loading in the MEA was electroactive.",

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T1 - Characterization of Pt-based catalyst materials by voltammetric techniques

AU - Koponen, U

AU - Kumpulainen, H

AU - Bergelin, Mikael

AU - Keskinen, J

AU - Peltonen, T

AU - Valkiainen, M

AU - Wasberg, Mikael

PY - 2003

Y1 - 2003

N2 - Catalyst materials in inks, in half-MEAs and in a polymer electrolyte membrane (PEM) fuel cell were characterized by cyclic voltammetry. Lab.-made Pt inks were modified with Ru, Os and Ru+Ir and the MeOH oxidn. activity of the created surfaces was tested. A novel electrode, which enables the study of the O redn. reaction on the cathode was introduced. With this measuring device it was possible to vary the O content on the ink side and the p activity of the electrolyte on the membrane side of a half-MEA. Catalyst layers based on Pt, Pt-Ru and Pt-Co inside a PEM-unit cell were also characterized in situ by cyclic voltammetry. The active surface areas are linearly dependent on the Pt mass d. in the catalyst layers. Approx. 30% of the Pt loading in the MEA was electroactive.

AB - Catalyst materials in inks, in half-MEAs and in a polymer electrolyte membrane (PEM) fuel cell were characterized by cyclic voltammetry. Lab.-made Pt inks were modified with Ru, Os and Ru+Ir and the MeOH oxidn. activity of the created surfaces was tested. A novel electrode, which enables the study of the O redn. reaction on the cathode was introduced. With this measuring device it was possible to vary the O content on the ink side and the p activity of the electrolyte on the membrane side of a half-MEA. Catalyst layers based on Pt, Pt-Ru and Pt-Co inside a PEM-unit cell were also characterized in situ by cyclic voltammetry. The active surface areas are linearly dependent on the Pt mass d. in the catalyst layers. Approx. 30% of the Pt loading in the MEA was electroactive.

U2 - 10.1016/S0378-7753(03)00079-X

DO - 10.1016/S0378-7753(03)00079-X

M3 - Artikel

SN - 0378-7753

VL - 118

SP - 325

EP - 333

JO - Journal of Power Sources

JF - Journal of Power Sources

IS - 1-2

ER -

Characterization of Pt-​based catalyst materials by voltammetric techniques

Abstract

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Characterization of Pt-based catalyst materials by voltammetric techniques