(126f) Effect of Electric Field on Kinetic Modeling of the ORR: Rationalizing pH Behavior of Metal and Oxide ORR Catalysts
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Next, we show that this simple kinetic model can also explain experimental trends seen on oxide catalysts used in the ORR. By considering subtle differences in the O vs OH scaling relation as well as the effect of electric field, we are able to explain why researchers have struggled to find oxide catalysts which compete with platinum for 4e-ORR activity in acid, as well as why oxide catalysts tend to be more selective toward the 2e-ORR than similar metal catalysts. Ultimately, we show that that this updated kinetic model can help explain experimentally observed catalytic trends, as well as help predict future oxygen reduction catalysts.
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