Construction of amorphous/crystalline Fe doped CoSe for effective electrocatalytic oxygen evolution

Herein, amorphous/crystalline Fe-doped CoSe was synthesized (Fe-CoSe/NF), and it exhibited high oxygen evolution reaction (OER) performance. The synergistic effect of the Fe dopant and the amorphous/crystalline structure is conducive to the formation of high valence Co3+ and Fe3+ active sites. Fe-CoSe/NF shows low overpotentials of 269 mV@50 mA cm-2 and 280 mV@100 mA cm-2. Herein, amorphous/crystalline Fe-doped CoSe was synthesized (Fe-CoSe/NF). It exhibited high OER performance of 269 mV@50 mA cm-2 and 280 mV@100 mA cm-2. The Tafel slope is 38 mV dec-1 and can maintain high activity stably for more than 135 h.