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Construction of Ti3C2 supported hybrid Co3O4/NCNTs composite as an efficient oxygen reduction electrocatalyst

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  • Liu, Jing
  • Mi, Liwei
  • Xing, Yanan
  • Wang, Tianfu
  • Wang, Fu

Abstract

Developing high performance non-Pt oxygen reduction reaction (ORR) electrocatalysts is vital for the practical applications of fuel cell but it still remains a grand challenge. Herein, an in-situ pyrolysis strategy was explored to prepare hybrid Co3O4/N-doped carbon nanotubes catalyst supported on the surface of Ti3C2 (Co3O4/NCNTs/Ti3C2). Owing to the synergistic effects of constituent components, as-prepared Co3O4/NCNTs/Ti3C2 exhibited superior ORR activity (diffusion limited current 5.41 mA cm−2 and half-wave potential 0.79 V) to the commercial Pt/C (diffusion limited current 5.14 mA cm−2 and half-wave potential 0.78 V). Meanwhile, the Co3O4/NCNTs/Ti3C2 catalyst demonstrated moderately good stability. Compared with the loss of current (∼54%) of commercial Pt/C, 48% current decrease was observed for Co3O4/NCNTs/Ti3C2 after the chronoamperometric measurement for 6 × 103 s. In view of the enhanced activity and stability, Co3O4/NCNTs/Ti3C2 holds high potential as a practical ORR electrocatalyst.

Suggested Citation

  • Liu, Jing & Mi, Liwei & Xing, Yanan & Wang, Tianfu & Wang, Fu, 2020. "Construction of Ti3C2 supported hybrid Co3O4/NCNTs composite as an efficient oxygen reduction electrocatalyst," Renewable Energy, Elsevier, vol. 160(C), pages 1168-1173.
    • Handle: RePEc:eee:renene:v:160:y:2020:i:c:p:1168-1173
    DOI: 10.1016/j.renene.2020.07.059
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    References listed on IDEAS

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    1. Mark K. Debe, 2012. "Electrocatalyst approaches and challenges for automotive fuel cells," Nature, Nature, vol. 486(7401), pages 43-51, June.
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    1. Wang, Qing & Han, Ning & Bokhari, Awais & Li, Xue & Cao, Yue & Asif, Saira & Shen, Zhengfeng & Si, Weimeng & Wang, Fagang & Klemeš, Jiří Jaromír & Zhao, Xiaolin, 2022. "Insights into MXenes-based electrocatalysts for oxygen reduction," Energy, Elsevier, vol. 255(C).

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    Keywords

    Ti3C2; Co3O4; N-doped carbon nanotubes; ORR;
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