TY - JOUR
T1 - Analysis of the redox reaction of 9,10-phenanthrenequinone on a gold electrode surface by cyclic voltammetry and time-resolved Fourier transform surface-enhanced Raman scattering spectroscopy
AU - Ishioka, Toshio
AU - Uchida, Tatsuya
AU - Teramae, Norio
N1 - Funding Information:
This work was partially supported by a Grant-in-Aid for Scientific Research on Priority Area of “Electrochemistry of Ordered Interfaces” no. 10131207 and a Grant-in-Aid for Scientific Research (A), no. 11304054 from the Ministry of Education, Culture, Sports, Science and Technology, Japan.
PY - 2001/12/10
Y1 - 2001/12/10
N2 - The adsorption behavior of 9,10-phenanthrenequione (PQ) onto a gold electrode surface and its surface-confined electrochemical reaction was analyzed by cyclic voltammetry (CV) and surface-enhanced Raman scattering (SERS) spectroscopy. Although PQ could adsorb onto gold and obeyed Langmuir isotherm behavior similarly to the case of graphite electrodes, the adsorptivity of PQ onto a gold surface was much weaker than that on to a graphite surface. In contrast to adsorption of PQ on a graphite electrode where π-interaction between phenanthrene ring and the electrode surface plays an important role, SERS measurements indicated that the interaction between PQ and the gold surface was caused by a carbonyl oxygen atom of PQ. The surface-confined redox reaction was analyzed in situ by time-resolved (TR) FT-SERS, and it was found that the amount of radical intermediates accumulated on a gold electrode was negligibly small compared to products during 50 ms measurements after the potential was stepped-up. The standard electrochemical rate constant (k0) was evaluated from TR SERS spectra, and was found to be 0.08 s-1 for PQ.
AB - The adsorption behavior of 9,10-phenanthrenequione (PQ) onto a gold electrode surface and its surface-confined electrochemical reaction was analyzed by cyclic voltammetry (CV) and surface-enhanced Raman scattering (SERS) spectroscopy. Although PQ could adsorb onto gold and obeyed Langmuir isotherm behavior similarly to the case of graphite electrodes, the adsorptivity of PQ onto a gold surface was much weaker than that on to a graphite surface. In contrast to adsorption of PQ on a graphite electrode where π-interaction between phenanthrene ring and the electrode surface plays an important role, SERS measurements indicated that the interaction between PQ and the gold surface was caused by a carbonyl oxygen atom of PQ. The surface-confined redox reaction was analyzed in situ by time-resolved (TR) FT-SERS, and it was found that the amount of radical intermediates accumulated on a gold electrode was negligibly small compared to products during 50 ms measurements after the potential was stepped-up. The standard electrochemical rate constant (k0) was evaluated from TR SERS spectra, and was found to be 0.08 s-1 for PQ.
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U2 - 10.1016/S0003-2670(01)01352-6
DO - 10.1016/S0003-2670(01)01352-6
M3 - Article
AN - SCOPUS:0035842524
SN - 0003-2670
VL - 449
SP - 253
EP - 260
JO - Analytica Chimica Acta
JF - Analytica Chimica Acta
IS - 1-2
ER -