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Study of the influence of different anionic electrolytes on the water electrolysis performance of Ni3S2 based materials

Author

Listed:
  • Li, Na
  • Zhao, Han
  • Du, Xiaoqiang
  • Zhang, Xiaoshuang

Abstract

It is critical to explore robust catalysts and research the catalyst's response to specific anions in alkaline seawater. In this paper, Ni3S2-based electrodes were in situ generated on nickel foam (NF) through hydrothermal preparation method to produce Ni3Sn2S2@Ni3S2/NF, FeS@Ni3S2/NF and Ni3S2/NF. Compared with other catalysts, Ni3Sn2S2@Ni3S2/NF has superior activity in hydrogen evolution reactions (HER) in the studied electrolyte systems, especially containing chloride ions. When the electrolyte conditions were 1 M KOH +1 M NaCl and 1 M KOH + seawater, the Ni3Sn2S2@Ni3S2/NF catalyst could reach the 10 mA cm−2 at the small overpotential of 116 mV and 117 mV. However, the oxygen evolution reactions (OER) performance of Ni3Sn2S2@Ni3S2/NF catalyst is excellent in the chlorine-containing electrolyte, but decreased in the non-chlorine-containing electrolyte. The results show that chloride ions may have a positive influence on the electrolytic process of the electrode. It is worth mentioning that the unique cubic nanostructure of Ni3Sn2S2@Ni3S2/NF provided a lot of reactive centres, and after 12 h full hydrolysis measurement in 1 M KOH + seawater condition, a lot of tiny nanocube structures were added on the surface of Ni3Sn2S2@Ni3S2/NF. Therefore, Ni3Sn2S2@Ni3S2/NF is a high performance catalyst with promising applications in alkaline electrolyte containing chloride ions.

Suggested Citation

  • Li, Na & Zhao, Han & Du, Xiaoqiang & Zhang, Xiaoshuang, 2025. "Study of the influence of different anionic electrolytes on the water electrolysis performance of Ni3S2 based materials," Renewable Energy, Elsevier, vol. 241(C).
    • Handle: RePEc:eee:renene:v:241:y:2025:i:c:s0960148125000333
    DOI: 10.1016/j.renene.2025.122371
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