Scholarlink

<p>Developing efficient and earth-abundant electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) remains an important challenge for sustainable hydrogen production. Herein, we report an interfacially coupled MoS<sub>2</sub>-MXene heterostructure synthesized by integrating hierarchical MoS₂ nanoflowers with highly conductive MXene sheets through a facile hydrothermal strategy. The resulting composite preserves the unique structural characteristics of both constituents, where edge-rich MoS₂ nanoflowers are intimately interfaced with layered MXene sheets, generating abundant heterointerfaces for efficient charge transport and catalytic reactions. Benefiting from the synergistic interaction at the heterointerface, the MoS₂-MXene composite exhibits significantly enhanced electrocatalytic performance toward both HER and OER in alkaline electrolyte. For OER, the catalyst requires low overpotentials of only 140 and 410 mV to achieve current densities of 10 and 100&#xa0;mA cm⁻², respectively, accompanied by a small Tafel slope of 35 mV dec⁻¹, indicating favorable reaction kinetics. For HER, overpotentials of 377 and 618 mV are required to reach cathodic current densities of 10 and 100&#xa0;mA cm⁻², respectively, representing a substantial improvement over pristine MoS₂ and MXene electrodes. The enhanced bifunctional electrocatalytic activity is attributed to the strong interfacial coupling between MoS₂ nanoflowers and MXene sheets, which facilitates rapid interfacial charge transfer, improves electronic conductivity, and increases the utilization of catalytically active sites. In addition, the hierarchical MoS₂ nanoflowers provide a high density of exposed edge sites, while the metallic MXene framework acts as an efficient electron-transport network, collectively accelerating the electrochemical reaction kinetics. This study demonstrates that heterointerface engineering between transition-metal chalcogenides and MXene materials offers an effective pathway for enhancing electrocatalytic activity and provides valuable insight into the rational design of advanced non-noble-metal electrocatalysts.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Interfacially coupled MoS2-MXene nanoflowers composite as high-performance bifunctional electrocatalyst for oxygen and hydrogen evolution reactions in alkaline media

  • 期刊论文

  • 发表日期：

    2026年7月16日

查看全文
  • Khushabu Shekhawat,
  • Sajana Pooniya,
  • Dinesh Bhalothia

摘要

Developing efficient and earth-abundant electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) remains an important challenge for sustainable hydrogen production. Herein, we report an interfacially coupled MoS2-MXene heterostructure synthesized by integrating hierarchical MoS₂ nanoflowers with highly conductive MXene sheets through a facile hydrothermal strategy. The resulting composite preserves the unique structural characteristics of both constituents, where edge-rich MoS₂ nanoflowers are intimately interfaced with layered MXene sheets, generating abundant heterointerfaces for efficient charge transport and catalytic reactions. Benefiting from the synergistic interaction at the heterointerface, the MoS₂-MXene composite exhibits significantly enhanced electrocatalytic performance toward both HER and OER in alkaline electrolyte. For OER, the catalyst requires low overpotentials of only 140 and 410 mV to achieve current densities of 10 and 100 mA cm⁻², respectively, accompanied by a small Tafel slope of 35 mV dec⁻¹, indicating favorable reaction kinetics. For HER, overpotentials of 377 and 618 mV are required to reach cathodic current densities of 10 and 100 mA cm⁻², respectively, representing a substantial improvement over pristine MoS₂ and MXene electrodes. The enhanced bifunctional electrocatalytic activity is attributed to the strong interfacial coupling between MoS₂ nanoflowers and MXene sheets, which facilitates rapid interfacial charge transfer, improves electronic conductivity, and increases the utilization of catalytically active sites. In addition, the hierarchical MoS₂ nanoflowers provide a high density of exposed edge sites, while the metallic MXene framework acts as an efficient electron-transport network, collectively accelerating the electrochemical reaction kinetics. This study demonstrates that heterointerface engineering between transition-metal chalcogenides and MXene materials offers an effective pathway for enhancing electrocatalytic activity and provides valuable insight into the rational design of advanced non-noble-metal electrocatalysts.

Graphical Abstract