Investigation of Pt catalytic effects on carbon support corrosion of the cathode catalyst in PEM fuel cells using DEMS spectra

Differential electrochemical mass spectrometry (DEMS) spectra of cathode exhaust gases, CO2, H2 and O2, 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.