Investigation of platinum oxidation in PEM fuel cells at various relative humidities
Abbreviated Journal Title
Electrochem. Solid State Lett.
OXIDE-GROWTH; KINETICS; Electrochemistry; Materials Science, Multidisciplinary
Surface oxidation of Pt cathode of proton exchange membrane (PEM) fuel cells at different relative humidities (RHs) was studied using cyclic voltammetry. The degree of platinum oxidation increased significantly with an increase in RH from 20% to 72%. Holding the cathode at high potentials and exposing it to air instead of N-2 resulted in the formation of more platinum oxides. At 20% RH, 0.85 V, and 100 degrees C, both water and oxygen equally contribute to platinum oxidation; at 100% RH, 0.85 V, and 100 degrees C, water produces more than 70% of the platinum oxidation while 30% forms from oxygen. (c) 2006 The Electrochemical Society.
Electrochemical and Solid State Letters
"Investigation of platinum oxidation in PEM fuel cells at various relative humidities" (2007). Faculty Bibliography 2000s. 7813.