DOI: 10.1039/d6ee04309g ISSN: 1754-5692

pH-dependent charging and ion insertion promote bifunctional oxygen electrocatalysis on MnO 2

Evan Z. Carlson, Karina Masalkovaite, Jaeheon Lee, Md Delowar Hossain, Xiao Zhao, Paul C. McIntyre, Bryan D. McCloskey, Hendrik Ohldag, William C. Chueh, Michal Bajdich, J. Tyler Mefford

The ORR and OER activity of α-K x MnO 2 simultaneously improve with increasing electrolyte pH. Electrochemistry, operando spectro-microscopy & grand-canonical DFT link this behavior to pH-dependent electrode charging and bulk cation (de)insertion.

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