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A. Comparison of in-situ EXAFS collected on as-prepared MnOx/Au-Si3N4 film and on MnOx/Au-Si3N4 film after in-situ exposure to ORR andOER potentials. B MnOx/Au-Si3N4 film poised at 0.7 V overlayed with Mn3O4 and alpha-Mn2O3. C. MnOx/Au-Si3N4 film poised at 1.8 V overlayed with Mn3O4, alpha-Mn2O3, and birnessite.
