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Synergistic Activity-Stability Breakthrough in Overall Water Splitting by MXene-Supported High-Entropy Phosphide
YaXi Zhang1,2, Jin Liang1, ZiQuan Zeng1
1School of Materials and Energy,Central South University of Forestry and Technology,Changsha410004, P. R. China.
ACS Applied Materials & Interfaces
|August 13, 2026
Summary
A novel bifunctional electrocatalyst using MXene and high-entropy phosphides was developed for efficient water splitting. This non-precious metal catalyst significantly reduces energy costs for hydrogen production.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Developing cost-effective, high-performance electrocatalysts is crucial for sustainable hydrogen production via water electrolysis.
- Non-precious metal catalysts are highly sought after to reduce the economic burden of hydrogen generation.
Purpose of the Study:
- To design and synthesize a self-supporting, bifunctional electrocatalyst with enhanced activity and stability for water splitting.
- To investigate the synergistic effects of interfacial modification and high-entropy strategy for optimizing catalyst performance.
Main Methods:
- Loading MXene onto nickel foam for interfacial modification.
- In situ growth of a quintuple high-entropy phosphide (CoNiZnFeMnP) on MXene/nickel foam.
- Characterization of the composite material (MX@CoNiZnFeMnP/NF) using various analytical techniques.
- Electrochemical testing for hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and overall water splitting.
Main Results:
- The MX@CoNiZnFeMnP/NF catalyst demonstrated excellent bifunctional activity in 1.0 M KOH.
- Low overpotentials were achieved: 73 mV for HER at 10 mA cm⁻² and 210 mV for OER at 50 mA cm⁻².
- The catalyst reached 10 mA cm⁻² at a low cell voltage of 1.43 V for overall water splitting with remarkable durability (>70 h).
Conclusions:
- The multiscale synergistic engineering approach, combining interfacial modification and high-entropy effects, leads to superior electrocatalytic performance.
- The developed MXene-based high-entropy phosphide catalyst shows great promise for efficient and cost-effective hydrogen production.
- This study provides valuable insights into designing advanced non-noble metal electrocatalysts for electrochemical energy applications.
