Comparison of fast scan voltammetry with microelectrode voltammetry of reduction of 1,4-benzoquinone

Voltammetric Determination of Both Concentration and Diffusion Coefficient by Combinational Use of Regular and Microelectrodes

“…We found that this tendency appeared more strongly at smaller electrodes (2a = 25 and 10 mm). We can explain this by a higher current density at smaller electrodes, which may accumulate the products and block the reduction of dioxygen, as has been found for reduction of benzoquinone [23].…”

“…This trend was more remarkable for larger concentrations at smaller electrodes. Higher current density at the microelectrode seems to cause complications, as is similar to the reduction of benzoquinone in acetonitrile [23], which formed film on the electrode. Indeed, film was found on the 0.1 mm electrode after voltammetry at a slow scans.…”

“…Electrodes 2a 0 < 0.05 mm were fabricated by coating a thin Pt wire with anodic electrophoretic paint [23]. Diameters of the two Pt disk electrodes were determined to be 2a 1 = 1.643 AE 0.003 mm and 2a 2 = 0.0964 AE 0.0011 mm as three times averages, where the errors stand for the standard deviations.…”

The electrochemical reduction of 1,4-benzoquinone in 1-ethyl-3-methylimidazolium bis(trifluoromethane-sulfonyl)-imide, [C2mim][NTf2]: A voltammetric study of the comproportionation between benzoquinone and the benzoquinone dianion

“…Many studies involving the reduction of 1,4-benzoquinone, BQ, have been undertaken in both aqueous [1][2][3][4][5][6][7][8][9] and non-aqueous [10][11][12][13][14][15][16][17][18][19][20][21] media. In aqueous media, it has long been established that quinones, Q, undergo reduction to form hydroquinone, H 2 Q, in the following process [1]:…”

Electrochemical study of 1,4-benzoquinone on gold surface modified

“…The electrochemical kinetics of the BQ/H 2 Q redox couple in aqueous solutions has been the subject of numerous investigations [1][2][3][4][5][6]. In the electrochemical determination of thiols, by their ability to operate as biomarkers, BQ plays an important role in these studies.…”