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Volume 109
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MXene-assisted NiFe sulfides with interfacial modulation for oxygen evolution electrocatalysis
Pei-Wei Zhong 1, Hong-Xiao Yang 1, Wenkang Xu, Zhiyang Yu, Bei Li, Hongjuan Wang, Yonghai Cao, Hao Yu, Hao-Fan Wang *
School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, Guangdong, China
10.1016/j.partic.2025.12.020
Volume 109, February 2026, Pages 211-218
Received 21 November 2025, Revised 19 December 2025, Accepted 20 December 2025, Available online 2 January 2026, Version of Record 8 January 2026.
E-mail: whf@scut.edu.cn
Highlights

• A core–shell S-NiFc MOF@Mo2CTx MXene hybrid was synthesized via a facile two-step hydrothermal strategy.

• Strong interfacial coupling between sulfides and MXene promotes efficient electron redistribution and charge transfer.

• Composite catalyst achieves an ultralow overpotential of 223 mV at 10 mA cm−2 and a Tafel slope of 41.3 mV dec−1.

• This study expands application scope of MXenes and provides new insights into optimizing OER electrocatalysts.


Abstract

Oxygen evolution reaction (OER) plays a vital role in various pivotal electrochemical applications. To improve the energy efficiency and economic viability of these technologies, it is critical to develop cost-effective and highly active OER electrocatalysts based on earth-abundant elements. Among various candidates, transition-metal-based compounds have demonstrated notable potential for OER electrocatalysis, attributable to their adjustable electronic configurations. Nevertheless, their practical application remains constrained by limited intrinsic activity, poor electrical conductivity, and particle aggregation, which compromise their overall OER efficiency. In this study, an efficient OER electrocatalyst, S-NiFc MOF@Mo2CTx, is constructed by the sulfidation of NiFe-based metal–organic framework (MOF) precursors anchored on conductive Mo2CTx MXene. The MOF-derived NiFe sulfides offer abundant accessible active sites, and the strong interfacial coupling between NiFe sulfides and Mo2CTx enhances the catalyst's intrinsic activity. The conductive Mo2CTx matrix also guarantees efficient electron transport and homogeneous dispersion of the active phase. As a result, S-NiFc MOF@ Mo2CTx exhibits excellent OER activity, reaching 10 mA cm−2 at an overpotential of 223 mV, along with stable operation for 68 h in 1.0 M KOH solution. This study broadens the scope of MXene-based materials in electrocatalytic applications and offers valuable insights into optimizing NiFe-derived OER catalysts.

Graphical abstract
Keywords
Oxygen evolution reaction; Electrocatalyst; Transition-metal-based materials; NiFe sulfides; Mo2CTx MXene
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