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Citation: Qiuting HUANG, Chenhui WEI, Hongxia HUANG, Houqing ZHOU, Xiaodong TANG, Jieyu LIANG. S/N co-doped graphene-decorated double perovskite La0.6Sr1.4Ni0.4Co1.6O6 as an efficient bifunctional oxygen electrocatalyst[J]. Chinese Journal of Inorganic Chemistry, ;2026, 42(8): 1779-1791. doi: 10.11862/CJIC.20260142 shu

S/N co-doped graphene-decorated double perovskite La0.6Sr1.4Ni0.4Co1.6O6 as an efficient bifunctional oxygen electrocatalyst

  • Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, Guangxi 541006, China

  • Corresponding author: Hongxia HUANG, hhxhunan@126.com
  • Received Date: 23 April 2026
    Revised Date: 8 July 2026

Figures(10)

  • The double perovskite oxide La0.6Sr1.4Ni0.4Co1.6O6 (LSNC) was synthesized using a simple sol-gel method, followed by physical mixing with S/N co-doped graphene (S/NG) to prepare LSNC@S/NG, thereby achieving excellent electrical conductivity and abundant active sites. When the mass fraction of S/NG was 15%, LSNC@S/NG-15% exhibited the largest specific surface area (11 m2·g-1) and electrochemical double-layer capacitance (71.14 mF·cm-2), which were significantly superior to those of the pristine perovskite. In linear sweep voltammetry (LSV) tests, this optimized composite demonstrated the best electrocatalytic activity for both the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR), achieving high anodic and cathodic current densities of 356.0 mA·cm-2 (termination potential: 1.97 V) and 300.4 mA·cm-2 (termination potential: 0.37 V), respectively. This remarkable enhancement in performance is attributed to the strong synergistic effect between the catalytically active LSNC particles and the highly conductive, defect-rich S/NG support, which facilitates rapid charge transfer and provides a larger density of accessible active sites.
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