Chinese Journal of Catalysis ›› 2019, Vol. 40 ›› Issue (8): 1205-1211.DOI: 10.1016/S1872-2067(19)63384-X

• Articles • Previous Articles     Next Articles

Cobalt/iron bimetal-organic frameworks as efficient electrocatalysts for the oxygen evolution reaction

Shili Xiea, Fei Lia, Suxian Xua, Jiayuan Lia, Wei Zengb   

  1. a State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, Liaoning, China;
    b Dalian Wondersun Biochemical Technology Co., LTD, Dalian 116600, Liaoning, China
  • Received:2019-03-14 Revised:2019-04-19 Online:2019-08-18 Published:2019-06-21
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (21872016), and the Fundamental Research Funds for the Central Universities (DUT17ZD204).

Abstract: The development of high efficiency and stable electrocatalysts for oxygen evolution is critical for energy storage and conversion systems. Herein, a series of Co/Fe bimetal-organic frameworks (MOFs) were fabricated using a facile ultrasonic method at room temperature, as electrocatalysts for the oxygen evolution reaction (OER) in alkaline solution. The Co2Fe-MOF exhibited an overpotential of 280 mV at a current density of 10 mA cm-2, a low Tafel slope of 44.7 mV dec-1, and long-term stability over 12000 s in 1 mol L-1 KOH. This impressive performance was attributed to the high charge transfer rate, large specific surface area, and synergistic effects of the cobalt and iron centers.

Key words: Bimetal-organic frameworks, Oxygen evolution reaction, Electrocatalysts, Synergetic effect, Ultrasonic method