Electrooxidation of Tetraphenylborate Ion at the Pyrolytic Graphite Electrode.

Facile and One Pot Synthesis of Gold Nanoparticles Using Tetraphenylborate and Polyvinylpyrrolidone for Selective Colorimetric Detection of Mercury Ions in Aqueous Medium

“…During this process, Ir (IV) is reduced to Ir (III). Taking into account the above presented results and the available information from literature [ 16 , 20 ], the following representative mechanism can be assigned to the reduction of Au 3+ to Au 0 by TPB:…”

“…The cyclic voltammetric response of TPB at a glassy carbon electrode in 0.5 M H 2 SO 4 solutions containing PVP, with and without dissolved HAuCl 4 is shown in Figure S-3 in the supporting information. Three irreversible peaks at 0.024, 0.62, and 0.98 V versus MSE are observed without the added HAuCl 4 [ 20 ]. Upon the addition of HAuCl 4 to this solution, all these peaks disappear, thus indicating the consumption of the electroactive TPB through decomposition.…”

Electrochemistry of Graphene

“…The first investigation of the doublelayer capacitance on pyrolytic graphite was by Bauer et al in 1968 [64]. Here, disk electrodes sealed in glass were employed [65] where the graphite surface was prepared by either polishing with an abrasive paper or cleaved using a sharp scalpel. Measurements were then taken in aqueous and organic solvents by varying either the frequency (between 50 and 25 000 Hz) or the potential with a fixed frequency.…”

Electrogenerated chemiluminescence in systems with tetraphenylborate anion as a co-reactant

“…It is clearly seen that TPB undergoes irreversible oxidation accompanied by electrode fouling with reaction products that is in agreement with other works. 2,4,5 Fig. 1a shows 3 consecutive cyclic voltammetric scans that indicate a slight reduction of the peak TPB ion oxidation current from scan to scan and the corresponding increase of peak potential.…”

“…Several later works were aimed at clarification of the TPB oxidation mechanism in different solutions including water. [3][4][5] At the same time the occurrence of electrogenerated chemiluminescence (ECL) emission from 1,5-diphenyl-3-styrylpyrazoline (DPSP), 1,5-diphenyl-3-(parachlorophenyl)pyrazoline and some other luminophores during their oxidation in dimethylformamide solution, where NaTPB served as a supporting electrolyte, was first reported in 1975. 6 The emission was supposed to be due to the decay of the excited complex of TPB anion and a luminophore radical cation leading to either direct emission from the exciplex or non-radiative decay of the latter with the excitation of luminophore molecules.…”