Hydroxyl radicals arising from the Fenton reagent remove metastable surface gold atoms (low coordinated high-energy surface atoms) on the Au surface, thus precluding the formation of stable oxides. The resultant smooth surface, upon hydroxyl-radical activation, electrocatalyzes oxygen evolution reaction in 0.1 M NaOH at overpotentials lowered by 190 mV @ 10 mA cm−2.
P. Esakki Karthik, C. Jeyabharathi and K. L. Phani, Chem. Commun., 2014, 50, 2787 DOI: 10.1039/C3CC48953A
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