Chem. J. Chinese Universities ›› 2017, Vol. 38 ›› Issue (11): 1999.doi: 10.7503/cjcu20170426

• Physical Chemistry • Previous Articles     Next Articles

NiFe2O4/NiO Nanocomposites as Electrocatalysts for Oxygen Evolution Reaction

FENG Xiaolei, QU Zongkai, CHEN Jun, WANG Dengdeng, CHEN Xu*(), YANG Wensheng   

  1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2017-07-04 Online:2017-11-10 Published:2017-10-30
  • Contact: CHEN Xu E-mail:chenxu@mail.buct.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.21521005, 21656001)

Abstract:

NiFe2O4/NiO nanocomposites were prepared by the thermal treatment of a single-source NiFe-layered double hydroxide precursor and were used as electrocatalysts for electrooxidation of water(oxygen evolution reaction, OER). The NiFe2O4/NiO nanocomposites exhibited much higher water oxidation activity and better stability than pure NiFe2O4, NiO and a physical mixture of NiFe2O4 and NiO synthesized by chemical coprecipitation method. A current density of 10 mA/cm2 was reached at an overpotential of 364 mV in alkaline media. The good electrocatalytic performance for OER could presumably be attributed to that the well-dispersed heterogeneous structure of the nanocomposites prevented the aggregation of NiFe2O4 and resulted in a higher surface area and a smaller charge transfer resistance compared with the control samples.

Key words: Spinel-type metal oxide, Oxygen evolution reaction, Water splitting, Nanocomposites

CLC Number: 

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