Chinese Journal of Catalysis ›› 2018, Vol. 39 ›› Issue (8): 1403-1410.DOI: 10.1016/S1872-2067(18)63053-0

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Three-dimensional lily-like CoNi2S4 as an advanced bifunctional electrocatalyst for hydrogen and oxygen evolution reaction

Jingwei Li, Qiuna Zhuang, Peiman Xu, Dawei Zhang, Licheng Wei, Dingsheng Yuan   

  1. School of Chemistry and Materials Science, Jinan University, Guangzhou 510632, Guangdong, China
  • Received:2018-01-24 Revised:2018-02-27 Online:2018-08-18 Published:2018-07-04
  • Contact: 10.1016/S1872-2067(18)63053-0
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21376105, 21576113).

Abstract:

Designing low-cost, highly efficient, and stable bifunctional electrocatalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is of vital significance for water splitting. Herein, three-dimensional lily-like CoNi2S4 supported on nickel foam (CoNi2S4/Ni) has been fabricated by sulfuration of the Co-Ni precursor. As expected, CoNi2S4/Ni possesses such outstanding electrocatalytic properties that it requires an overpotential of only 54 mV at 10 mA cm-2 and 328 mV at 100 mA cm-2 for HER and OER, respectively. Furthermore, by utilizing the CoNi2S4/Ni electrodes as bifunctional electrocatalysts for overall water splitting, a current density of 10 mA cm-2 can be obtained at a voltage of only 1.56 V.

Key words: Bifunctional electrocatalyst, Hydrogen evolution reaction, Oxygen evolution reaction, Lily-like CoNi2S4, Overall water splitting