Electrochemical behavior of hexamethylbenzene isocloso ruthenium-borane complex at a glassy carbon electrode in non-aqueous medium

Abstract

O comportamento eletroquímico do complexo rutênio-borano [(C 6 Me 6 )-isocloso-1-RuB 9 H 9 ] foi investigado utilizando um eletrodo de carbono vítreo em 0,1 mol L -1 de perclorato de tetrabutil amônio dissolvido em cloreto de metileno, utilizando um intervalo de temperatura entre -20 o C ≤ T ≤ 21 o C. Utilizaram-se técnicas de voltametria cíclica convolutiva, cronoamperometria e cronopotenciometria. Os parâmetros químicos e eletroquímicos dos complexos investigados foram determinados e confirmados por métodos de simulação digital. O coeficiente de difusão a temperaturas baixas e a cinética heterogênea de transferência de elétrons do complexo [(C 6 Me 6 )-isocloso-1-RuB 9 H 9 ] foram relatadas. Com base nos dados obtidos, a reação de eletrodo do complexo [(C 6 Me 6 )-isocloso-1-RuB 9 H 9 ] foi sugerida e discutida.Electrochemical behavior of hexamethylbenzene isocloso ruthenium-borane complex [(C 6 Me 6 )-isocloso-1-RuB 9 H 9 ] was investigated at a glassy carbon electrode in 0.1 mol L -1 tetrabutyl ammonium perchlorate dissolved in methylene chloride, at -20o C using convolutive cyclic voltammetry, chronoamperometry and chronopotentiometry techniques. The chemical and electrochemical parameters of the investigated complex have been determined and confirmed via digital simulation method. Low-temperature diffusion coefficient and heterogeneous electron transfer kinetics of the complex [(C 6 Me 6 )-isocloso-1-RuB 9 H 9 ] were reported. On the basis of the obtained data, the electrode reaction of the complex [(C 6 Me 6 )-isocloso-1-RuB 9 H 9 ] was suggested and discussed.

Convolutive Cyclic Voltammetry, Chronoamperometry and Chronopotentiometry Studies of C6Me6‐isocloso‐ruthenaborane Complex in Non‐aqueous Medium at a Glassy Carbon Electrode

“…29 The aim of the preset work was to study the nature of the electrochemical reaction of hexamethylbenzene isocloso ruthenium-borane complex {(C 6 Me 6 )-isocloso-1-RuB 10 H 10 } at a glassy carbon electrode in nonaqueous medium. Besides, effect of temperature on each of the kinetic parameters, activation energy barrier and the chemical and the electrochemical parameters have been determined and discussed.…”

Semi-differential analysis of irreversible voltammetric peaks

“…Various electrochemical processes, such as redox reactions with reduced and oxidised species present in the same phase [6,14,[21][22][23][24][25][26][27][28][29][30][31][32][33][34][35], adsorption on surfaces of electrodes [36][37][38], electrodeposition [39][40][41][42][43][44][45][46][47][48] or electrodissolution [49][50][51] were analysed by means of semi-differentiation or semi-integration. The most extensive mathematical treatment related to these methods was applied to the electrochemical reactions were both oxidised and reduced form are soluble in the electrolyte phase and their transport proceeds under conditions of semi-infinite linear diffusion [4].…”

Electrochemical Studies and Extraction of Chemical and Electrochemical Parameters of Zn(ii) Ion at Mercury Electrode via Convolutive Voltammetry and Digital Simulation Methods

“…The value of the transfer coefficient, α, for the cathodic reduction of the Zn(II) ion, calculated from the relationship 23 (E pc -E pc/2 ) = 48/αn a , was reported in Table 1. 28,29 For quasi-reversible and slow charge transfer there is a separation between the forward and backward direction of the I 1 convolution, whereas in the case of a chemical reaction following the charge transfer, i.e. EC mechanism, the backward direction of I 1 convolution does not return to the initial value.…”

“…[24][25][26][27] The shape of the I 1 -E curve exhibit important feature for the identification of the nature of the electrode process. For a simple rapid charge transfer, the shape of The convolution of the current data with an inverse square root of time, I 1 is defined as: [24][25][26][27][28][29][30] ( 2) where I 1 is the convoluted current at the total elapsed time and i(u) is the experimental current at time u.…”