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Promoting reactant accumulation at solid-liquid interfaces through microstrain-defect engineering in overall water
Krishankant1, Alok Kumar1, Rohit Bisht1
1Institute of Nano Science and Technology, Sec-81, Knowledge City, Sahibzada Ajit Singh Nagar, Punjab, 140306, India. bagchiv@inst.ac.in.
Chemical Communications (Cambridge, England)
|June 16, 2026
Summary
Microstrain-engineered cobalt iron phosphosulfide (CoFePS) derived from cobalt iron layered double hydroxide (CoFeLDH) significantly boosts water electrolysis efficiency. This material demonstrates remarkable stability and performance for clean hydrogen production.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Efficient water electrolysis is crucial for sustainable hydrogen production.
- Developing advanced electrocatalysts with enhanced interfacial properties and ion diffusion is key to improving electrolyzer performance.
- Cobalt iron layered double hydroxides (CoFeLDH) are promising precursors for catalyst synthesis.
Purpose of the Study:
- To engineer microstrain in CoFePS derived from CoFeLDH.
- To investigate the impact of microstrain on the solid-liquid interface and ion diffusion.
- To evaluate the electrocatalytic performance and stability of the engineered CoFePS for water electrolysis.
Main Methods:
- Synthesis of microstrain-engineered CoFePS from CoFeLDH.
- Electrochemical characterization including cyclic voltammetry and chronoamperometry.
- Electrolyzer testing to assess performance and long-term stability.
Main Results:
- Microstrain engineering in CoFePS enhanced the solid-liquid interface.
- Improved ion diffusion and double-layer capacitance (Cdl) were observed.
- The material achieved an overpotential of 1.44 V at 10 mA cm-².
- Demonstrated over 200 hours of stable operation for efficient water electrolysis.
Conclusions:
- Microstrain engineering is an effective strategy to enhance electrocatalyst performance.
- CoFePS derived from CoFeLDH shows great potential as a robust and efficient electrocatalyst for water electrolysis.
- The enhanced interfacial properties and ion transport contribute to superior catalytic activity and durability.
