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Electronic structure modulation in Ag nanoparticle-Ag2Cu2O3 catalyst: a strategy for stable and enhanced oxygen
Anagha Yatheendran1, Dhakshina Prakash1, Mohammed Ibrahim Shah M A1
1Nanoscience Research Laboratory, Department of Materials Science and Engineering, National Institute of Technology Calicut, Calicut, Kerala, India. sandhya@nitc.ac.in.
Nanoscale
|May 11, 2026
Summary
This study introduces a novel silver nanoparticle-anchored Ag2Cu2O3 catalyst that significantly enhances the Oxygen Reduction Reaction (ORR) kinetics. This breakthrough offers improved performance for fuel cells and metal-air batteries.
Area of Science:
- Electrochemistry
- Materials Science
- Nanotechnology
Background:
- The Oxygen Reduction Reaction (ORR) is vital for sustainable energy devices like fuel cells.
- Sluggish ORR kinetics necessitate efficient electrocatalysts for durable performance.
Purpose of the Study:
- To develop and characterize a novel electrocatalyst for enhanced ORR activity.
- To investigate the synergistic effects between silver nanoparticles and Ag2Cu2O3 for ORR catalysis.
Main Methods:
- Synthesis of silver nanoparticle-anchored Ag2Cu2O3 (Ag@Ag2Cu2O3).
- Electrochemical characterization of the catalyst's ORR performance.
- Density Functional Theory (DFT) computations to elucidate structure-activity relationships.
Main Results:
- Ag@Ag2Cu2O3 exhibited excellent and robust ORR activity due to synergistic interactions.
- DFT revealed optimized oxygen adsorption/desorption kinetics via electronic structure modulation of silver.
- An anion exchange membrane electrode assembly (MEA) with Ag@Ag2Cu2O3 achieved 48 mA cm⁻² current density in a direct methanol fuel cell (DMFC).
Conclusions:
- The synergistic interaction between Ag nanoparticles and Ag2Cu2O3 is key to high ORR performance.
- This work provides a new strategy for designing advanced catalysts for next-generation fuel cells.
