Multi-wall carbon nanotubes are filled in the cavity at the tip of a microelectrode to form a carbon nanotubes powder microelectrode(CNTs-PME).The CNTs-PME is used to study the electrochemical reduction of oxygen in aprotic media.It is a nearly reversible redox process of the O2/O·-2 couple at the CNTs-PME in the dimethyl sulfoxide(DMSO)solution.The heterogeneous electron transfer rate constant(ks)can be measured by steady-state voltammogram and the result is 9.8 10-3cm /s.As a weak oxidant,the reaction of O·-2 with epinephrine was studied by cyclic voltammetry.Additionally,the reaction of O·-2 with benzoic acid was also discussed in detail.
multi-wall carbon nanotubes, powder microelectrode, superoxide ion, cyclic voltammetry
Online Available Date
Ying-liang WEI, Chen SHAO, Hui FENG.
Study on the Electrogeneration and Properties of Superoxide Ion in Aprotic Media by Using Carbon Nanotubes Powder Microelectrode[J]. Journal of Electrochemistry,
Available at: https://jelectrochem.xmu.edu.cn/journal/vol13/iss2/19
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