Spinel oxide Ni1-xZnxCo2O4 (x=0.2-0.8) synergized with Co/N-CNT as electrocatalyst for oxygen electrode

Authors：Li, Chen-xin; Wu, Shi-long; Huang, Hong-xia^*; Wei, Chen-hui; Liu, Jin-liang

Source：Chemical Physics Letters, 2024, 835: 140996.

DOI：10.1016/j.cplett.2023.140996

• Spinel oxide
• Doping amount
• Oxygen electrode
• Catalytic performance

The spinel oxide Ni1-xZnxCo2O4 (x = 0.2-0.8) was synthesized. When x = 0.4, the catalytic activity for oxygen reactions was found to be the most optimal. To enhance its performance, a composites consisting of Co/N-CNT and Ni0.6Zn0.4Co2O4 was prepared. The oxygen electrode catalyzed by 10 % Co/N-CNT exhibited the highest catalytic activity. The current densities of 382.8 mA center dot cm(-2) and 343.7 mA center dot cm(-2) were achieved at the cut-off voltages of 1 V and 0.6 V, respectively. The results of electrochemical impedance test indicated that the charge transfer rate of the oxygen electrode catalyzed by 10 % Co/N-CNT was the fastest, providing further confirmation of its superior catalytic performance.

• Institution
  桂林理工大学