TY - JOUR
T1 - Sulfur dioxide exploitation by electrochemical oxidation of sulfite in near-neutral pH electrolytes
T2 - A kinetics and mechanistic study
AU - Márquez-Montes, R. A.
AU - Orozco-Mena, R. E.
AU - Lardizábal-Gutiérrez, D.
AU - Chávez-Flores, D.
AU - López-Ortíz, A.
AU - Ramos-Sánchez, V. H.
N1 - Publisher Copyright:
© 2019 The Authors
PY - 2019/7
Y1 - 2019/7
N2 - Electrochemical oxidation of sulfite ions offers an efficient and profitable approach to the conversion of sulfur dioxide, a harmful air pollutant, into valuable by-products via flue gas desulfurization. Here, the electrochemical oxidation of sulfite in near-neutral pH electrolytes is studied in order to determine kinetic parameters and a reaction mechanism. Sulfite electrooxidation on palladium is demonstrated at pH 7.5 and 8.5, the latter being comparable to platinum. Anodic charge transfer coefficients and non-linear reaction orders are linked to a mechanism which involves sulfite adsorption at low potentials. This study proves that sulfite electrooxidation on palladium at near-neutral pH is a useful approach for sulfur dioxide exploitation.
AB - Electrochemical oxidation of sulfite ions offers an efficient and profitable approach to the conversion of sulfur dioxide, a harmful air pollutant, into valuable by-products via flue gas desulfurization. Here, the electrochemical oxidation of sulfite in near-neutral pH electrolytes is studied in order to determine kinetic parameters and a reaction mechanism. Sulfite electrooxidation on palladium is demonstrated at pH 7.5 and 8.5, the latter being comparable to platinum. Anodic charge transfer coefficients and non-linear reaction orders are linked to a mechanism which involves sulfite adsorption at low potentials. This study proves that sulfite electrooxidation on palladium at near-neutral pH is a useful approach for sulfur dioxide exploitation.
KW - Kinetics
KW - Palladium
KW - Reaction mechanism
KW - Sulfite electrooxidation
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U2 - 10.1016/j.elecom.2019.106481
DO - 10.1016/j.elecom.2019.106481
M3 - Article
AN - SCOPUS:85067892922
SN - 1388-2481
VL - 104
JO - Electrochemistry Communications
JF - Electrochemistry Communications
M1 - 106481
ER -