Comparative Study of the Degradation of Different Carbon Supported Pt Fuel Cell Catalysts

TY - JOUR

T1 - Comparative Study of the Degradation of Different Carbon Supported Pt Fuel Cell Catalysts

AU - Hartl, Katrin Gabriele

AU - Hanzlik, Marianne

AU - Arenz, Matthias

PY - 2011

Y1 - 2011

N2 - Before characterizing fuel cell catalysts in time and cost intensive MEA or fuel cell stack tests, it is advantageous to evaluate catalysts in fast and inexpensive electrochemical half-cell tests. Recently, we developed a new methodology for accelerated degradation tests in electrochemical half-cells, IL-TEM, which enables the comparison of the surface area loss of the catalysts, determined by RDE, with the change in local structure, e.g. the detachment of individual particles from the high surface area carbon support, determined by TEM. In this presentation we demonstrate by IL-TEM that relative small differences in the synthesis of the catalyst can have a pronounced effect in the observed degradation mechanism.

AB - Before characterizing fuel cell catalysts in time and cost intensive MEA or fuel cell stack tests, it is advantageous to evaluate catalysts in fast and inexpensive electrochemical half-cell tests. Recently, we developed a new methodology for accelerated degradation tests in electrochemical half-cells, IL-TEM, which enables the comparison of the surface area loss of the catalysts, determined by RDE, with the change in local structure, e.g. the detachment of individual particles from the high surface area carbon support, determined by TEM. In this presentation we demonstrate by IL-TEM that relative small differences in the synthesis of the catalyst can have a pronounced effect in the observed degradation mechanism.

M3 - Journal article

SN - 1938-5862

VL - 41

SP - 811

EP - 816

JO - E C S Transactions

JF - E C S Transactions

IS - 1

ER -