Comparative IL-TEM study concerning the degradation of carbon supported Pt-based electrocatalysts

Katrin Gabriele Hartl; Marianne Hanzlik; Matthias Arenz

doi:10.1149/2.035206jes

Comparative IL-TEM study concerning the degradation of carbon supported Pt-based electrocatalysts

Katrin Gabriele Hartl, Marianne Hanzlik, Matthias Arenz

Kemisk Institut

36 Citationer (Scopus)

Abstract

The identical location transmission electron microscopy (IL-TEM) approach is used for a comparative study of the degradation of several standard Pt-based electrocatalysts for low temperature proton conducting membrane fuel cells (PEMFCs). By comparing the quantitative Pt surface area loss with IL-TEM micrographs, it is shown that in accelerated stress tests particle migration and coalescence as well as particle detachment are the main degradation channels for the chosen catalysts. No unambiguous indication for a major contribution of Pt dissolution to the surface area loss is found. Furthermore, it is demonstrated that seemingly similar catalysts can exhibit under identical treatment pronounced differences in their degradation behavior. A finding questioning the common praxis of comparative catalyst studies without full disclosure and discussion of their synthesis.

Originalsprog	Engelsk
Tidsskrift	Journal of the Electrochemical Society
Vol/bind	159
Udgave nummer	6
Sider (fra-til)	B677-B682
Antal sider	6
ISSN	0013-4651
DOI	https://doi.org/10.1149/2.035206jes
Status	Udgivet - 2012

Adgang til dokumentet

10.1149/2.035206jes

Citationsformater

@article{22d959727f504ed3acff5ddb823d2f0c,

title = "Comparative IL-TEM study concerning the degradation of carbon supported Pt-based electrocatalysts",

abstract = "The identical location transmission electron microscopy (IL-TEM) approach is used for a comparative study of the degradation of several standard Pt-based electrocatalysts for low temperature proton conducting membrane fuel cells (PEMFCs). By comparing the quantitative Pt surface area loss with IL-TEM micrographs, it is shown that in accelerated stress tests particle migration and coalescence as well as particle detachment are the main degradation channels for the chosen catalysts. No unambiguous indication for a major contribution of Pt dissolution to the surface area loss is found. Furthermore, it is demonstrated that seemingly similar catalysts can exhibit under identical treatment pronounced differences in their degradation behavior. A finding questioning the common praxis of comparative catalyst studies without full disclosure and discussion of their synthesis.",

author = "Hartl, {Katrin Gabriele} and Marianne Hanzlik and Matthias Arenz",

year = "2012",

doi = "10.1149/2.035206jes",

language = "English",

volume = "159",

pages = "B677--B682",

journal = "Journal of The Electrochemical Society",

issn = "0013-4651",

publisher = "Electrochemical Society",

number = "6",

}

TY - JOUR

T1 - Comparative IL-TEM study concerning the degradation of carbon supported Pt-based electrocatalysts

AU - Hartl, Katrin Gabriele

AU - Hanzlik, Marianne

AU - Arenz, Matthias

PY - 2012

Y1 - 2012

N2 - The identical location transmission electron microscopy (IL-TEM) approach is used for a comparative study of the degradation of several standard Pt-based electrocatalysts for low temperature proton conducting membrane fuel cells (PEMFCs). By comparing the quantitative Pt surface area loss with IL-TEM micrographs, it is shown that in accelerated stress tests particle migration and coalescence as well as particle detachment are the main degradation channels for the chosen catalysts. No unambiguous indication for a major contribution of Pt dissolution to the surface area loss is found. Furthermore, it is demonstrated that seemingly similar catalysts can exhibit under identical treatment pronounced differences in their degradation behavior. A finding questioning the common praxis of comparative catalyst studies without full disclosure and discussion of their synthesis.

AB - The identical location transmission electron microscopy (IL-TEM) approach is used for a comparative study of the degradation of several standard Pt-based electrocatalysts for low temperature proton conducting membrane fuel cells (PEMFCs). By comparing the quantitative Pt surface area loss with IL-TEM micrographs, it is shown that in accelerated stress tests particle migration and coalescence as well as particle detachment are the main degradation channels for the chosen catalysts. No unambiguous indication for a major contribution of Pt dissolution to the surface area loss is found. Furthermore, it is demonstrated that seemingly similar catalysts can exhibit under identical treatment pronounced differences in their degradation behavior. A finding questioning the common praxis of comparative catalyst studies without full disclosure and discussion of their synthesis.

U2 - 10.1149/2.035206jes

DO - 10.1149/2.035206jes

M3 - Journal article

SN - 0013-4651

VL - 159

SP - B677-B682

JO - Journal of The Electrochemical Society

JF - Journal of The Electrochemical Society

IS - 6

ER -

Comparative IL-TEM study concerning the degradation of carbon supported Pt-based electrocatalysts

Abstract

Adgang til dokumentet

Fingeraftryk

Citationsformater