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Updated: Feb 13, 2026
15:08
Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells
Published on: September 20, 2012
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Harnessing Dynamic Metal-Oxide Interfaces for Durably Active Fuel Cell Electrocatalysis.
Yuefei Cui1, Liang Chang1, Xiangyu You2
1Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China.
Advanced Materials (Deerfield Beach, Fla.)
|February 12, 2026
Summary
Metal oxide interfaces in fuel cells exhibit dynamic "breathing" behavior, enhancing oxygen reduction reaction (ORR) activity and stability. This strategy overcomes the trade-off between catalyst performance and durability.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Metal-oxide interfaces significantly influence electrocatalyst performance.
- Understanding the dynamic behavior of these interfaces under operational conditions is crucial.
- A persistent challenge is balancing catalyst activity with long-term stability.
Purpose of the Study:
- To investigate the dynamic interface behavior in MOx/Pt systems during the oxygen reduction reaction (ORR).
- To explore how dynamic interfaces can overcome the activity-stability trade-off in fuel cell catalysts.
- To demonstrate a generalizable strategy for enhancing both activity and durability.
Main Methods:
- Fabrication of well-defined platinum (Pt) octahedra decorated with ultrathin p-block metal oxide (MOx) overlayers.
- Electrochemical testing under varying potentials to study the oxygen reduction reaction (ORR).
- Analysis of interface evolution and its correlation with catalytic performance and stability.
Main Results:
- A dynamic,
- breathing
- interface behavior was observed in MOx/Pt (M = In, Sn, Sb) systems.
- Reducing potentials formed oxygen-deficient M-Pt interfaces, boosting ORR activity (In-Pt > Sn-Pt ~ Sb-Pt) via charge transfer.
- Oxidizing potentials generated oxygen-enriched M-O-Pt structures, suppressing Pt dissolution and enhancing durability, especially with SnOx.
Conclusions:
- Harnessing dynamic metal-oxide interfaces is a novel and generalizable strategy for improving electrocatalysts.
- This approach effectively breaks the activity-stability trade-off for various Pt and Pt-bimetallic catalysts.
- Demonstrated success in InSnOx-decorated PtCo catalysts highlights the broad applicability.
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