TY - JOUR
T1 - Electrochemical generation of ROS in ionic liquid for the degradation of lignin model compound
AU - Wang, Lei
AU - Liu, Shuangyan
AU - Jiang, Haomin
AU - Chen, Yueying
AU - Wang, Linan
AU - Duan, Guoyi
AU - Sun, Yanzhi
AU - Chen, Yongmei
AU - Wan, Pingyu
N1 - Publisher Copyright:
© 2018 The Electrochemical Society.
PY - 2018
Y1 - 2018
N2 - p-benzyloxyl phenol (PBP), as a lignin model compound, was electrochemically degraded in [BMIM]BF4 ionic liquid (IL) using an oxygen reduction reaction (ORR) cathode. The utilization of this kind of aprotic IL made it possible to identify which kind of reactive oxygen species (ROS) played an important role in the electrochemical depolymerization of lignin. Electrochemical study confirmed that superoxide radical ( ·O2−), the one-electron reductive product of dioxygen, is the main resultant of ORR in [BMIM]BF4. However, the generated ·O2− radical transformed into hydroperoxyl radical ( · OOH) in the presence of protons donated by PBP, and then received one more electron to form H2O2, which then attacked and broke down the alkyl-O-aryl bonds in PBP molecules. The continuous electrolysis of PBP in [BMIM]BF4 provided indirect evidence to reveal that the in situ generated H2O2 on ORR cathode was responsible for the cleavage of ether bonds in PBP.
AB - p-benzyloxyl phenol (PBP), as a lignin model compound, was electrochemically degraded in [BMIM]BF4 ionic liquid (IL) using an oxygen reduction reaction (ORR) cathode. The utilization of this kind of aprotic IL made it possible to identify which kind of reactive oxygen species (ROS) played an important role in the electrochemical depolymerization of lignin. Electrochemical study confirmed that superoxide radical ( ·O2−), the one-electron reductive product of dioxygen, is the main resultant of ORR in [BMIM]BF4. However, the generated ·O2− radical transformed into hydroperoxyl radical ( · OOH) in the presence of protons donated by PBP, and then received one more electron to form H2O2, which then attacked and broke down the alkyl-O-aryl bonds in PBP molecules. The continuous electrolysis of PBP in [BMIM]BF4 provided indirect evidence to reveal that the in situ generated H2O2 on ORR cathode was responsible for the cleavage of ether bonds in PBP.
UR - http://www.scopus.com/inward/record.url?scp=85058427359&partnerID=8YFLogxK
U2 - 10.1149/2.0801811jes
DO - 10.1149/2.0801811jes
M3 - Article
AN - SCOPUS:85058427359
SN - 0013-4651
VL - 165
SP - H705-H710
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
IS - 11
ER -
