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Pd-PdO Nanodomains on Amorphous Ru Metallene Oxide for High-Performance Multifunctional Electrocatalysis
Viet-Hung Do1,2, P Prabhu1, Vishal Jose1,2
1School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore.
Advanced Materials (Deerfield Beach, Fla.)
|January 4, 2023
Summary
This study introduces a new electrocatalyst made of palladium-palladium oxide nanodomains on ruthenium oxide. It shows high efficiency for hydrogen evolution, oxygen evolution, and water splitting, crucial for sustainable energy.
Area of Science:
- Materials Science
- Electrochemistry
- Sustainable Energy
Background:
- Developing efficient multifunctional electrocatalysts is vital for sustainable energy technologies.
- Current electrocatalysts face challenges in achieving high activity and stability across various reactions.
Purpose of the Study:
- To synthesize a novel electrocatalyst with enhanced performance for key energy conversion reactions.
- To investigate the structure-activity relationships of the designed electrocatalyst.
Main Methods:
- A facile synthetic strategy was employed to create atomically thin palladium-palladium oxide nanodomains confined to amorphous ruthenium oxide.
- Electrochemical characterization was performed to evaluate catalytic activity for hydrogen evolution, oxygen evolution, oxygen reduction, and overall water splitting.
Main Results:
- The Pd2RuOx-0.5h catalyst demonstrated excellent pH-universal hydrogen evolution reaction (HER) activity, low overpotentials for oxygen evolution reaction (OER), and efficient overall water splitting.
- Further reduction to Pd2RuOx-2h yielded promising alkaline oxygen reduction reaction (ORR) activity with high selectivity and poison tolerance.
- Enhanced performance was attributed to atomically thin nanosheet morphology, coexisting amorphous/defective crystalline phases, and heterostructural features.
Conclusions:
- The developed multifunctional electrocatalyst exhibits superior catalytic performance for multiple crucial energy reactions.
- The rational design integrating specific nanostructures and phases is key to optimizing electronic properties and reaction energetics for electrocatalysis.
