Abstract
Differential electrochemical mass spectrometry (DEMS) spectra of cathode exhaust gases, CO 2, H 2 and O 2, are presented for the first time to characterize the Pt redox reactions and Pt-catalyzed oxygen reduction reaction (ORR), as well as correlate them to carbon support corrosion (CSC) of the cathode catalyst in a real proton exchange membrane fuel cell (PEMFC). Furthermore, different oxidation states of Pt with catalytic capacity for CSC are indicated.
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