Exploring the surface plasmon catalytic reactions mechanism by three-phase interface modification combining with...

Area of Science:

• Catalysis
• Surface Chemistry
• Spectroscopy

Background:

• Local surface plasmon resonance (LSPR) is an emerging catalytic technique, particularly for aromatic amine compounds.
• The precise reaction mechanisms and processes of LSPR catalysis remain incompletely understood.

Purpose of the Study:

• To elucidate the reaction mechanism of LSPR catalysis in aromatic amine transformations.
• To investigate the role of the gas-liquid-solid three-phase interface (GLSTI) in facilitating these reactions.
• To expand the understanding and applications of plasmon-induced catalytic reactions.

Main Methods:

• Utilized a silver nano-dendrites substrate with high surface-enhanced Raman spectroscopy (SERS) activity.
• Employed the gas-liquid-solid three-phase interface (GLSTI) to facilitate the catalytic reaction.
• Applied in situ SERS and electrochemical SERS (EC-SERS) for mechanistic investigations.
• Studied the surface plasmon-catalyzed reaction of p-aminothiophenol (PATP) and p-phenylenediamine (PDA).

Main Results:

• The GLSTI was shown to significantly promote surface plasmon catalytic reactions by providing sufficient oxygen at three-phase points.
• In situ SERS and EC-SERS provided valuable insights into the reaction pathways and intermediates.
• Demonstrated the effectiveness of the silver nano-dendrites substrate in SERS-based mechanistic studies.

Conclusions:

• The GLSTI is a crucial factor in enhancing surface plasmon-catalyzed reactions involving aromatic amines.
• This study provides a clearer understanding of the LSPR catalytic mechanism.
• Highlights new directions for research in plasmon-induced catalysis.