Electrochemical behavior of cytochrome c at a bis(4-pyridyl)disulphide modified gold electrodes covered with nanoporous alumina templates was investigated. The experimental results show that the nanoporous alumina tem...Electrochemical behavior of cytochrome c at a bis(4-pyridyl)disulphide modified gold electrodes covered with nanoporous alumina templates was investigated. The experimental results show that the nanoporous alumina templates promote further the direct electron transfer of cytochrome c on the modified gold electrode, resulting in a well-defined fast votammetric response.展开更多
The glucose oxidase (GOD) immobilized onto the surface of activated ca rbon powders at the glassy carbon electrode (GOD-C/GC) could undergo the quasi-r eversible, direct electrochemical reaction. Its formal redox pote...The glucose oxidase (GOD) immobilized onto the surface of activated ca rbon powders at the glassy carbon electrode (GOD-C/GC) could undergo the quasi-r eversible, direct electrochemical reaction. Its formal redox potential, E0′, is almost independent on the scan rates. The average value of E0′ is (-0.467 ± 0 .002) V (vs SCE) in the pH 6.8 phosphate buffer solution. Its apparent heterogen eous electron transfer rate constant (ks) is (1.18 ± 0.59) s-1, which is much h igher than that reported previously. The dependence of E0′ on the pH of the buf fer solution indicated that the direct electrochemical reaction of the immobiliz ed GOD is a two-electron transfer reaction process coupled with two-proton trans fer. The further experimental results demonstrated that the immobilized GOD reta ined its bioelectrocatalytic activity to the oxidation of β-D(+) glucose.展开更多
It was found that the electrochemistry of ctyochrome C was reversible at gold electrode surface modified with glucides and alcohols, and the electrochemical reaction of cytochrome C was related with the coverage of pr...It was found that the electrochemistry of ctyochrome C was reversible at gold electrode surface modified with glucides and alcohols, and the electrochemical reaction of cytochrome C was related with the coverage of promoters adsorbed on the electrode surface. 7’h(> i r1 fl11(}T]cc of l:I1(’ I1l1 n ll)()r (f)f. I1y(I l’()xyl gr()1lp t.() 1\h(’ pr`)lTl(f)1,i()rl efr()ct of glucides and alcohols was also studied.展开更多
文摘Electrochemical behavior of cytochrome c at a bis(4-pyridyl)disulphide modified gold electrodes covered with nanoporous alumina templates was investigated. The experimental results show that the nanoporous alumina templates promote further the direct electron transfer of cytochrome c on the modified gold electrode, resulting in a well-defined fast votammetric response.
文摘The glucose oxidase (GOD) immobilized onto the surface of activated ca rbon powders at the glassy carbon electrode (GOD-C/GC) could undergo the quasi-r eversible, direct electrochemical reaction. Its formal redox potential, E0′, is almost independent on the scan rates. The average value of E0′ is (-0.467 ± 0 .002) V (vs SCE) in the pH 6.8 phosphate buffer solution. Its apparent heterogen eous electron transfer rate constant (ks) is (1.18 ± 0.59) s-1, which is much h igher than that reported previously. The dependence of E0′ on the pH of the buf fer solution indicated that the direct electrochemical reaction of the immobiliz ed GOD is a two-electron transfer reaction process coupled with two-proton trans fer. The further experimental results demonstrated that the immobilized GOD reta ined its bioelectrocatalytic activity to the oxidation of β-D(+) glucose.
文摘It was found that the electrochemistry of ctyochrome C was reversible at gold electrode surface modified with glucides and alcohols, and the electrochemical reaction of cytochrome C was related with the coverage of promoters adsorbed on the electrode surface. 7’h(> i r1 fl11(}T]cc of l:I1(’ I1l1 n ll)()r (f)f. I1y(I l’()xyl gr()1lp t.() 1\h(’ pr`)lTl(f)1,i()rl efr()ct of glucides and alcohols was also studied.
