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Development of hollow Co nanoparticles coupled with oxygen vacancy-modified MXene for enhanced HER/OER electrocatalysis

Author

Listed:
  • Zhou, Shangyan
  • Liu, Fei
  • Wang, Jiamin
  • Yang, Tongda
  • Wu, Yutong
  • Wang, Huarui
  • Wang, Xiaodan

Abstract

Developing efficient bifunctional electrocatalysts for hydrogen/oxygen evolution reactions (HER/OER) is critical for sustainable hydrogen production. Herein, we construct hollow Co nanoparticles (NPs) on oxygen vacancy-modified MXene (Co HNPs@MXene) via Ostwald ripening, achieving exceptional catalytic performance with overpotentials of 34 mV (HER) and 240 mV (OER) at 10 mA cm−2, along with 80 h and 78 h stability, respectively. The MXene substrate provides superior electron transport, while the hollow Co architecture increases active sites. Moreover, synergistic effects between oxygen vacancies and Co nanoparticles further enhance activity. This work offers new insights into designing stable, high-performance water-splitting catalysts through hollow nanostructure engineering.

Suggested Citation

  • Zhou, Shangyan & Liu, Fei & Wang, Jiamin & Yang, Tongda & Wu, Yutong & Wang, Huarui & Wang, Xiaodan, 2026. "Development of hollow Co nanoparticles coupled with oxygen vacancy-modified MXene for enhanced HER/OER electrocatalysis," Renewable Energy, Elsevier, vol. 256(PF).
    • Handle: RePEc:eee:renene:v:256:y:2026:i:pf:s0960148125019895
    DOI: 10.1016/j.renene.2025.124325
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    References listed on IDEAS

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    1. Veeramani, Krishnan & Janani, Gnanaprakasam & Kim, Joonyoung & Surendran, Subramani & Lim, Jaehyoung & Jesudass, Sebastian Cyril & Mahadik, Shivraj & lee, Hyunjung & Kim, Tae-Hoon & Kim, Jung Kyu & Si, 2023. "Hydrogen and value-added products yield from hybrid water electrolysis: A critical review on recent developments," Renewable and Sustainable Energy Reviews, Elsevier, vol. 177(C).
    2. Min, Shixiong & Duan, Yan & Li, Yanan & Wang, Fang, 2020. "Biomass-derived self-supported porous carbon membrane embedded with Co nanoparticles as an advanced electrocatalyst for efficient and robust hydrogen evolution reaction," Renewable Energy, Elsevier, vol. 155(C), pages 447-455.
    3. Yin Qin & Tingting Yu & Sihao Deng & Xiao-Ye Zhou & Dongmei Lin & Qian Zhang & Zeyu Jin & Danfeng Zhang & Yan-Bing He & Hua-Jun Qiu & Lunhua He & Feiyu Kang & Kaikai Li & Tong-Yi Zhang, 2022. "RuO2 electronic structure and lattice strain dual engineering for enhanced acidic oxygen evolution reaction performance," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
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