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Crystalline Structural Engineering of an Electrical Insulator Into A Highly-Active Electrocatalyst for Oxygen
Jingxuan He1, Xiaoqiang Wu2, Sean Li3
1School of Physics, University of Electronic Science and Technology of China, Chengdu, 610054, China.
Small (Weinheim an Der Bergstrasse, Germany)
|February 27, 2025
Summary
Amorphous strontium ruthenium oxide (SRO) films fabricated using pulsed laser deposition show enhanced oxygen evolution reaction (OER) activity for water splitting. This amorphous structure engineering strategy offers a new path for developing efficient electrocatalysts.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Efficient electrocatalysts are vital for water splitting technologies.
- Perovskite oxides show promise as oxygen evolution catalysts due to their structural and electronic properties.
Purpose of the Study:
- To investigate the potential of amorphous strontium ruthenium oxide (SRO) films as electrocatalysts for the oxygen evolution reaction (OER).
- To explore the influence of oxygen partial pressure on the catalytic activity of amorphous SRO.
Main Methods:
- Fabrication of amorphous SRO films on a glassy carbon (GC) substrate using pulsed laser deposition (PLD).
- Electrochemical evaluation of SRO films for OER activity.
- Investigation of the effect of oxygen partial pressure on film properties and catalytic performance.
Main Results:
- Amorphous SRO films exhibited superior OER catalytic activity compared to crystalline SRO.
- Oxygen partial pressure was found to modulate oxygen vacancy content and active site valence, thereby regulating OER activity.
- Evidence suggests amorphous SRO can initiate a self-adaptive process crucial for electrochemical reactions.
Conclusions:
- Amorphous structure engineering is an effective strategy for designing high-performance OER catalysts.
- Amorphous SRO presents a promising candidate for next-generation electrocatalysts in water splitting applications.
