Journal of Shanghai University(Natural Science Edition) ›› 2021, Vol. 27 ›› Issue (4): 706-716.doi: 10.12066/j.issn.1007-2861.2154

• Research Articles • Previous Articles     Next Articles

Controlled synthesis of NiFe2O4/Co9S8 nanocomposites derived from metal-organic frameworks as efficient electrocatalysts for oxygen evolution reaction

WANG Shangdai, HUANG Shoushuang, HU Zhangjun, CHEN Zhiwen()   

  1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
  • Received:2019-04-01 Online:2021-08-20 Published:2021-07-22
  • Contact: CHEN Zhiwen E-mail:zwchen@shu.edu.cn

Abstract:

This paper reported the controlled synthesis of NiFe2O4/Co9S8 nanocomposites via annealing and sulfuration of metal-organic frameworks (MOFs). Due to the porous structure and the strong synergetic effects between the different composites, the as-prepared NiFe2O4/Co9S8 nanocomposite catalysts afforded an electrocatalytic oxygen evolution reaction (OER) with a current density of 10 mA/cm2 at a low overpotential of 290 mV and a small Tafel slope of approximately 63.02 mV/dec in 1 mol/L KOH. Moreover, the NiFe2O4/Co9S8 nanocomposite catalysts showed outstanding stability without obvious decline after 1 000 cycles of sequential cyclic voltammetry (CV) scanning. The findings not only provide a promising strategy for designing efficient and stable OER catalysts but also can be extended to synthesize other novel nanocomposite materials.

Key words: metal-organic frameworks (MOFs), nanocomposite catalysts, water splitting, oxygen evolution reaction (OER)

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