Oxygen evolution reaction catalysts cell reversal

Efficient Oxygen Evolution Reaction Catalysts for Cell Reversal and Start/Stop Tolerance... 

In addition to enhancing the presence of water at the anode through modifications to the anode structure, a PEM fitel cell can be made more tolerant to voltage reversal by incorporating an additional catalyst, a water electrolysis (oxygen evolution reaction, OER) catalyst, at the anode to promote the electrolysis of water [14-16, 18]. In this way, more of the current forced through the cell may be consumed by the electrolysis of water than by the oxidation of the anode components. In a reversal-tolerant fuel cell, the anode comprises a first catalyst composition for evolving protons from the fuel and a second catalyst composition for water electrolysis. 

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