Surface plasmon enhanced interfacial electron transfer and resonance Raman, surface-enhanced resonance Raman studies of cytochrome C mutants
- Iowa State Univ., Ames, IA (United States)
Surface plasmon resonance was utilized to enhance the electron transfer at silver/solution interfaces. Photoelectrochemical reductions of nitrite, nitrate, and CO2 were studied on electrochemically roughened silver electrode surfaces. The dependence of the photocurrent on photon energy, applied potential and concentration of nitrite demonstrates that the photoelectrochemical reduction proceeds via photoemission process followed by the capture of hydrated electrons. The excitation of plasmon resonances in nanosized metal structures resulted in the enhancement of the photoemission process. In the case of photoelectrocatalytic reduction of CO2, large photoelectrocatalytic effect for the reduction of CO2 was observed in the presence of surface adsorbed methylviologen, which functions as a mediator for the photoexcited electron transfer from silver metal to CO2 in solution. Photoinduced reduction of microperoxidase-11 adsorbed on roughened silver electrode was also observed and attributed to the direct photoejection of free electrons of silver metal. Surface plasmon assisted electron transfer at nanostructured silver particle surfaces was further determined by EPR method.
- Research Organization:
- Ames Lab., Ames, IA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 754842
- Report Number(s):
- IS-T--1884
- Country of Publication:
- United States
- Language:
- English
Similar Records
Photoinduced electrochemical reduction of nitrite at an electrochemically roughened silver surface
Surface-enhanced resonance Raman scattering from methylviologen at a silver electrode: Evidence for two distinct adsorption interactions
Surface-Plasmon-Assisted Photoelectrochemical Reduction of CO2 and NO3– on Nanostructured Silver Electrodes
Journal Article
·
Thu Aug 05 00:00:00 EDT 1999
· Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical
·
OSTI ID:682070
Surface-enhanced resonance Raman scattering from methylviologen at a silver electrode: Evidence for two distinct adsorption interactions
Journal Article
·
Wed Mar 07 23:00:00 EST 1990
· Journal of Physical Chemistry; (USA)
·
OSTI ID:7140650
Surface-Plasmon-Assisted Photoelectrochemical Reduction of CO2 and NO3– on Nanostructured Silver Electrodes
Journal Article
·
Sat May 26 20:00:00 EDT 2018
· Advanced Energy Materials
·
OSTI ID:1630604