کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4907906 1426582 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Reprint of “Analytical theoretical approach to the transient and steady state voltammetric response of reaction mechanisms. Linear diffusion and reaction layers at micro- and submicroelectrodes of arbitrary geometry”
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Reprint of “Analytical theoretical approach to the transient and steady state voltammetric response of reaction mechanisms. Linear diffusion and reaction layers at micro- and submicroelectrodes of arbitrary geometry”
چکیده انگلیسی


- A general solving strategy for reaction mechanisms at any interface geometry is proposed.
- The approach is based on appropriate definitions of linear reaction and diffusion layers.
- δr, G and δG are defined by electrode geometry and formally identical for any reaction scheme.
- Accurate equations for the current-potential response at microelectrodes are obtained.
- Steady-state and total chemical equilibrium responses can be derived as limit cases.

A powerful theoretical approach to solve electrochemical reaction-diffusion problems with fast homogeneous kinetics is applied to obtain expressions for the transient current-potential-time response of a number of reaction mechanisms at microelectrodes of very different shapes, also applicable to ion transfer processes at liquid | liquid microinterfaces. The steady state response can be obtained as a limit when the characteristic dimension of the microelectrode tends to zero. Also, expressions under total chemical equilibrium conditions are derived when the linear reaction layer vanishes. The physico-chemical principles are based on suitable definitions of the so-called linear diffusion and reaction layers, which take into account the influence of the geometry of the diffusion field. The results presented fall within the so-called “kinetic steady state” and “diffusive-kinetic steady state” approaches and also give insight into the magnitude and extent of the perturbation of the chemical equilibrium conditions near the electrode surface as a consequence of the charge transfer process.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 793, 15 May 2017, Pages 104-112
نویسندگان
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