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- W2146176747 abstract "Abstract Addition of Fe to Ni‐ and Co‐based (oxy)hydroxides has been shown to enhance the activity of these materials for electrochemical oxygen evolution. Here we show that Fe cations bound to the surface of oxidized Au exhibit enhanced oxygen evolution reaction (OER) activity. We find that the OER activity increases with increasing surface concentration of Fe. Density functional theory analysis of the OER energetics reveals that oxygen evolution over Fe cations bound to a hydroxyl‐terminated oxidized Au (Fe–Au 2 O 3 ) occurs at an overpotential ∼0.3 V lower than over hydroxylated Au 2 O 3 (0.82 V). This finding agrees well with experimental observations and is a consequence of the more optimal binding energetics of OER reaction intermediates at Fe cations bound to the surface of Au 2 O 3 . These findings suggest that the enhanced OER activity reported recently upon low‐potential cycling of Au may be due to surface Fe impurities rather than to “superactive” Au III surfaquo species." @default.
- W2146176747 created "2016-06-24" @default.
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- W2146176747 date "2015-10-22" @default.
- W2146176747 modified "2023-10-06" @default.
- W2146176747 title "Experimental and Computational Evidence of Highly Active Fe Impurity Sites on the Surface of Oxidized Au for the Electrocatalytic Oxidation of Water in Basic Media" @default.
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- W2146176747 doi "https://doi.org/10.1002/celc.201500364" @default.
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