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Activation of Oxygen on Gold and Silver Nanoparticles Assisted by Surface Plasmon Resonances
- Source :
- Angewandte Chemie International Edition. 53:2353-2357
- Publication Year :
- 2014
- Publisher :
- Wiley, 2014.
-
Abstract
- Surface plasmon resonances (SPRs) have been found to promote chemical reactions. In most oxidative chemical reactions oxygen molecules participate and understanding of the activation mechanism of oxygen molecules is highly important. For this purpose, we applied surface-enhanced Raman spectroscopy (SERS) to find out the mechanism of SPR-assisted activation of oxygen, by using p-aminothiophenol (PATP), which undergoes a SPR-assisted selective oxidation, as a probe molecule. In this way, SPR has the dual function of activating the chemical reaction and enhancing the Raman signal of surface species. Both experiments and DFT calculations reveal that oxygen molecules were activated by accepting an electron from a metal nanoparticle under the excitation of SPR to form a strongly adsorbed oxygen molecule anion. The anion was then transformed to Au or Ag oxides or hydroxides on the surface to oxidize the surface species, which was also supported by the heating effect of the SPR. This work points to a promising new era of SPR-assisted catalytic reactions.
- Subjects :
- Singlet oxygen
education
Surface plasmon
Inorganic chemistry
chemistry.chemical_element
General Medicine
General Chemistry
Surface-enhanced Raman spectroscopy
Photochemistry
Oxygen
Chemical reaction
Catalysis
Silver nanoparticle
chemistry.chemical_compound
chemistry
Molecule
Surface plasmon resonance
Subjects
Details
- ISSN :
- 14337851
- Volume :
- 53
- Database :
- OpenAIRE
- Journal :
- Angewandte Chemie International Edition
- Accession number :
- edsair.doi.dedup.....71c1c32f03509824f65d3c35bf0f5e2d