Related Experiment Video
Updated: May 15, 2025
07:23
Fabrication of Thin Film Silver/Silver Chloride Electrodes with Finely Controlled Single Layer Silver Chloride
Published on: July 1, 2020
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Improved Chloride Tolerance of Pt Surface by Ionomer Layer Structure Engineering
Jongmin Lee1, Jongsu Noh1, Vy Thuy Nguyen2
1Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Korea.
Chemsuschem
|April 8, 2025
Summary
Engineered ionomer layers effectively suppress chloride poisoning in platinum catalysts. This novel approach enhances electrocatalyst durability and performance in energy conversion devices.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Electrocatalyst advancements are crucial for electrochemical energy devices.
- Airborne impurities, especially chloride (Cl-), cause performance degradation by poisoning catalysts like platinum (Pt).
Purpose of the Study:
- To develop an effective strategy for suppressing Cl- poisoning of Pt catalysts.
- To improve the reliability of electrocatalytic systems under challenging conditions.
Main Methods:
- Engineering the ionomer layer using a hybrid interface of cation and anion exchange ionomers.
- In situ inductively coupled plasma-mass spectrometry (ICP-MS) to analyze local Cl- concentration at the Pt surface.
Main Results:
- The hybrid ionomer interface successfully modified the local microenvironment at the catalyst surface.
- Local Cl- concentration at the Pt surface decreased by 40% compared to the bulk concentration.
- Significant suppression of Cl- poisoning was achieved, maintaining catalyst activity and mitigating Pt dissolution.
Conclusions:
- The hybrid ionomer interface is a synergistic approach to suppress Cl- poisoning.
- Ionomer layer engineering offers a promising pathway to enhance the durability of electrocatalytic systems.
- This strategy addresses a critical challenge for the commercialization of electrochemical energy conversion devices.
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