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Updated: Apr 11, 2026
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Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase
Published on: December 4, 2017
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Chiral-Encoded Pt-Ir Surfaces as Apparent Spin Filter for Enhanced Oxygen Reduction
Zikkawas Pasom1,2, Krissanapat Yomthong1, Sopon Butcha1,2
1School of Energy Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong, Thailand.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|April 10, 2026
Summary
Chiral Induced Spin Selectivity (CISS) in chiral metal alloys significantly impacts the oxygen reduction reaction (ORR). One enantiomer catalyzes ORR, while its mirror image inhibits it, opening new avenues for clean energy catalysts.
Area of Science:
- Electrochemistry
- Materials Science
- Catalysis
Background:
- Chiral Induced Spin Selectivity (CISS) is a key effect for enhancing the oxygen reduction reaction (ORR).
- CISS has been primarily studied on chiral organic layers, with limited exploration in chiral metal matrices.
- The oxygen reduction reaction (ORR) is crucial for clean energy technologies.
Purpose of the Study:
- To investigate the CISS effect in chiral-encoded mesoporous platinum-iridium (Pt-Ir) alloys for ORR.
- To explore the potential of chiral metal matrices in CISS-based catalysis.
- To understand the asymmetric reactivity in chiral Pt-Ir alloys during ORR.
Main Methods:
- Fabrication of chiral-encoded mesoporous Pt-Ir alloys.
- Electrochemical characterization of ORR activity on imprinted electrodes.
- Analysis of spin interactions and oxygen adsorption effects.
Main Results:
- Demonstrated a substantial difference in ORR activity between Pt-Ir electrodes imprinted with opposite enantiomers.
- Observed that one enantiomer catalyzes oxygen reduction, while the other acts as an inhibitor.
- Identified an interplay between CISS and oxygen adsorption leading to asymmetric spin interactions.
Conclusions:
- Chiral metal matrices can exhibit significant CISS effects for ORR.
- The findings reveal unusual asymmetric reactivity in chiral Pt-Ir alloys.
- This study paves the way for designing novel CISS-based ORR catalysts for clean energy applications.
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