Core-shell nanoparticle based SERS from hydrogen adsorbed on a rhodium(111) electrode

Area of Science:

• Electrochemistry
• Surface Science
• Spectroscopy

Background:

• Understanding hydrogen interactions with metal surfaces is crucial for catalysis.
• In situ electrochemical studies are vital for realistic reaction condition analysis.
• Rhodium is a key catalyst in many hydrogenation reactions.

Purpose of the Study:

• To present the first in situ surface Raman spectra of hydrogen on rhodium.
• To demonstrate the application of Surface-Enhanced Raman Spectroscopy (SERS) and SHINERS for studying electrochemical interfaces.
• To investigate the H-Rh(111) system using these advanced techniques.

Main Methods:

• Utilized gold-core rhodium-shell (Au@Rh) nanoparticles for SERS.
• Employed gold-core silica-shell (Au@SiO(2)) nanoparticles for SHINERS.
• Performed in situ electrochemical measurements under controlled conditions.

Main Results:

• Successfully obtained in situ surface Raman spectra of hydrogen on rhodium.
• Demonstrated the capability of SHINERS to study single crystal surfaces like Rh(111).
• Provided direct spectroscopic evidence of hydrogen species on the rhodium surface during electrochemical processes.

Conclusions:

• In situ surface Raman spectroscopy is a powerful tool for probing hydrogen-rhodium interactions.
• SHINERS offers a versatile platform for studying complex electrochemical systems.
• This work advances the understanding of hydrogen electrochemistry on rhodium surfaces.