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Nanoceria-Supported Ruthenium(0) Nanoparticles: Highly Active and Stable Catalysts for Hydrogen Evolution from Water
Elif Demir1,2, Serdar Akbayrak1,3, Ahmet M Önal1
1Department of Chemistry, Middle East Technical University , 06800 Ankara, Turkey.
ACS Applied Materials & Interfaces
|February 9, 2018
Summary
Ruthenium(0) nanoparticles on nanoceria exhibit excellent electrocatalytic activity for hydrogen evolution from water. This catalyst demonstrates high efficiency and remarkable stability for acidic water splitting.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Developing efficient electrocatalysts is crucial for sustainable hydrogen production.
- Nanoceria (CeO2) offers a promising support material due to its unique redox properties.
- Ruthenium-based catalysts are known for their activity in water splitting.
Purpose of the Study:
- To synthesize and characterize Ruthenium(0) nanoparticles supported on nanoceria (Ru0/CeO2).
- To evaluate the electrocatalytic performance of Ru0/CeO2 for hydrogen evolution reaction (HER) in acidic media.
- To assess the long-term stability and efficiency of the developed electrocatalyst.
Main Methods:
- Synthesis of Ru0/CeO2 nanoparticles via NaBH4 reduction of Ru3+ on CeO2.
- Characterization using advanced analytical tools.
- Electrochemical measurements using a glassy carbon electrode (GCE) modified with Ru0/CeO2 for HER.
Main Results:
- The Ru0/CeO2 (1.86 wt % Ru) modified GCE showed high exchange current density (0.67 mA·cm-2) and low overpotential (47 mV at 10 mA·cm-2).
- Achieved a small Tafel slope (41 mV·dec-1), indicating efficient HER kinetics.
- Demonstrated exceptional long-term stability with no onset potential shift after 10,000 scans.
- Collected evolved hydrogen gas confirmed nearly 100% Faradaic efficiency.
Conclusions:
- Ru0/CeO2 nanoparticles are highly effective electrocatalysts for hydrogen evolution in acidic water splitting.
- The catalyst exhibits superior activity, stability, and efficiency.
- This work contributes to the development of advanced materials for clean hydrogen energy production.
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