Morphology of carbon supported Pt-Ru electrocatalyst and the CO tolerance of anodes for PEM fuel cells

Shawn D. Lin; Ting Chou Hsiao; Jen Ray Chang; Andrew S. Lin

doi:10.1021/jp982296p

Morphology of carbon supported Pt-Ru electrocatalyst and the CO tolerance of anodes for PEM fuel cells

Shawn D. Lin, Ting Chou Hsiao, Jen Ray Chang, Andrew S. Lin^*

^*Corresponding author for this work

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

66 Scopus citations

Abstract

Two Pt-Ru/C catalysts, a commercial 20% Pt-10% Ru/C and a 10% Pt-5% Ru/C synthesized in house (YZU catalyst), were examined for the CO tolerance in polymer-electrolyte-membrane fuel cells (PEFCs). Both half-cell tests under 250 ppm of CO/H₂ and single-cell tests under 100 ppm of CO/H₂ showed that the YZU catalyst had smaller increase in the overvoltage at a given current. The platinum-ruthenium microstructures of these two electrocatalysts in the fabricated electrodes were characterized by X-ray absorption spectroscopy (EXAFS). EXAFS indicated that there was no Pt-Ru metal-metal interaction in the commercial catalyst; instead, only ruthenium oxide signals were observed. On the other hand, the YZU catalyst contains a Pt-Ru bimetallic interaction as indicated by the X-ray absorption spectra. It was considered that the Pt-Ru alloy structure has better CO tolerance than nonalloy Pt-Ru structure.

Original language	English
Pages (from-to)	97-103
Number of pages	7
Journal	Journal of Physical Chemistry B
Volume	103
Issue number	1
DOIs	https://doi.org/10.1021/jp982296p
State	Published - 07 01 1999
Externally published	Yes

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title = "Morphology of carbon supported Pt-Ru electrocatalyst and the CO tolerance of anodes for PEM fuel cells",

abstract = "Two Pt-Ru/C catalysts, a commercial 20% Pt-10% Ru/C and a 10% Pt-5% Ru/C synthesized in house (YZU catalyst), were examined for the CO tolerance in polymer-electrolyte-membrane fuel cells (PEFCs). Both half-cell tests under 250 ppm of CO/H2 and single-cell tests under 100 ppm of CO/H2 showed that the YZU catalyst had smaller increase in the overvoltage at a given current. The platinum-ruthenium microstructures of these two electrocatalysts in the fabricated electrodes were characterized by X-ray absorption spectroscopy (EXAFS). EXAFS indicated that there was no Pt-Ru metal-metal interaction in the commercial catalyst; instead, only ruthenium oxide signals were observed. On the other hand, the YZU catalyst contains a Pt-Ru bimetallic interaction as indicated by the X-ray absorption spectra. It was considered that the Pt-Ru alloy structure has better CO tolerance than nonalloy Pt-Ru structure.",

author = "Lin, {Shawn D.} and Hsiao, {Ting Chou} and Chang, {Jen Ray} and Lin, {Andrew S.}",

year = "1999",

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doi = "10.1021/jp982296p",

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T1 - Morphology of carbon supported Pt-Ru electrocatalyst and the CO tolerance of anodes for PEM fuel cells

AU - Lin, Shawn D.

AU - Hsiao, Ting Chou

AU - Chang, Jen Ray

AU - Lin, Andrew S.

PY - 1999/1/7

Y1 - 1999/1/7

N2 - Two Pt-Ru/C catalysts, a commercial 20% Pt-10% Ru/C and a 10% Pt-5% Ru/C synthesized in house (YZU catalyst), were examined for the CO tolerance in polymer-electrolyte-membrane fuel cells (PEFCs). Both half-cell tests under 250 ppm of CO/H2 and single-cell tests under 100 ppm of CO/H2 showed that the YZU catalyst had smaller increase in the overvoltage at a given current. The platinum-ruthenium microstructures of these two electrocatalysts in the fabricated electrodes were characterized by X-ray absorption spectroscopy (EXAFS). EXAFS indicated that there was no Pt-Ru metal-metal interaction in the commercial catalyst; instead, only ruthenium oxide signals were observed. On the other hand, the YZU catalyst contains a Pt-Ru bimetallic interaction as indicated by the X-ray absorption spectra. It was considered that the Pt-Ru alloy structure has better CO tolerance than nonalloy Pt-Ru structure.

AB - Two Pt-Ru/C catalysts, a commercial 20% Pt-10% Ru/C and a 10% Pt-5% Ru/C synthesized in house (YZU catalyst), were examined for the CO tolerance in polymer-electrolyte-membrane fuel cells (PEFCs). Both half-cell tests under 250 ppm of CO/H2 and single-cell tests under 100 ppm of CO/H2 showed that the YZU catalyst had smaller increase in the overvoltage at a given current. The platinum-ruthenium microstructures of these two electrocatalysts in the fabricated electrodes were characterized by X-ray absorption spectroscopy (EXAFS). EXAFS indicated that there was no Pt-Ru metal-metal interaction in the commercial catalyst; instead, only ruthenium oxide signals were observed. On the other hand, the YZU catalyst contains a Pt-Ru bimetallic interaction as indicated by the X-ray absorption spectra. It was considered that the Pt-Ru alloy structure has better CO tolerance than nonalloy Pt-Ru structure.

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Morphology of carbon supported Pt-Ru electrocatalyst and the CO tolerance of anodes for PEM fuel cells

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