Oxygen Reduction Activity Indicator for Fuel Cell Catalysts at Rated Voltage

The available indicators of catalysts for oxygen reduction reaction (ORR) activity are typically characterized at high potentials (commonly at 0.9 V), whereas fuel cells generally operate at 0.8V∼0.6V in its practical application. In our work, charge-transfer resistance (Rct) was proposed to evaluate the ORR activity of catalysts for fuel cells at rated voltage. Firstly, the Rct of MEA with Pt/C catalysts was measured in the range of...