TY - JOUR
T1 - UV-Visible Reflection Absorption Spectroscopy in the Presence of Convective Flow
AU - Zhao, Ming
AU - Scherson, Daniel Alberto
PY - 1992/1/1
Y1 - 1992/1/1
N2 - A spectroelectrochemical technique is herein described in which the surface of a rotating disk electrode is used as a mirror to reflect a focused beam of Hght in the UV-vis range at a near normal incidence angle. This approach makes it possible to probe quantitatively the presence of absorbing species in the diffusion boundary layer under well-defined hydrodynamic conditions. Good agreement between theory and experiments was obtained using the oxidation of Fe(CN)6 4-as a model system. In particular, the absorbance difference at the diffusion limiting current was found to be proportional to the reactant concentration, cR, for a fixed rotation rate, ω, and proportional to ω-1/2for a fixed cR.
AB - A spectroelectrochemical technique is herein described in which the surface of a rotating disk electrode is used as a mirror to reflect a focused beam of Hght in the UV-vis range at a near normal incidence angle. This approach makes it possible to probe quantitatively the presence of absorbing species in the diffusion boundary layer under well-defined hydrodynamic conditions. Good agreement between theory and experiments was obtained using the oxidation of Fe(CN)6 4-as a model system. In particular, the absorbance difference at the diffusion limiting current was found to be proportional to the reactant concentration, cR, for a fixed rotation rate, ω, and proportional to ω-1/2for a fixed cR.
UR - http://www.scopus.com/inward/record.url?scp=0003600114&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0003600114&partnerID=8YFLogxK
U2 - 10.1021/ac00047a032
DO - 10.1021/ac00047a032
M3 - Article
AN - SCOPUS:0003600114
SN - 0003-2700
VL - 64
SP - 3064
EP - 3067
JO - Analytical chemistry
JF - Analytical chemistry
IS - 23
ER -