Xiaojuan Zhu, Qin Liu, Xifeng Shi, Abdullah M. Asiri, Xuping Sun
Index: 10.1039/C8QI00163D
Full Text: HTML
It is highly desired to develop high-performance non-noble-metal electrocatalysts for oxygen evolution reaction (OER) in alkaline solutions. In this communication, we report the hydrothermal synthesis of Fe-MOF nanosheet array on nickel foam (Fe-MOF/NF) using aqueous Fe3+ and terephthalic acid as precursors. Such Fe-MOF/NF shows superior electrocatalytic performance towards OER in 1.0 M KOH with a low overpotential of 240 mV at 50 mA cm-2 and a small Tafel slop of 72 mV dec-1. Notably, this catalyst also exhibits high long-term electrochemical durability to maintain its activity for at least 30 h. Moreover, this catalyst electrode achieves a high turnover frequency of 0.74 mol O2 s-1 at an overpotential of 300 mV.
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