Buder-Volmer equation

Buthiazide [2043-38-1] Buthidazole [55511-98-6] Buthiobate [51308-54-4] Buthiomne sulfoximme Butisol sodium Buder-Volmer equation... 

According to the Buder-Volmer equation, the dependence of q on 7 is linear in a range of few millivolts around the reversible electrode potential, whereas it becomes logarithmic at q> 50-100 mV away from equilibrium conditions, depending on the degree of reversibility of the specific electrode reaction ... 

These two reactions may be generalized to the Buder-Volmer equation ... 

The Buder-Volmer equation can be applied to many, but not all, systems. Moreover, many of the systems that do not follow the Buder-Volmer model are of great practical importance, eg, in the corrosion of passivating metals (see Corrosion and corrosion control). 

Somewhat similar reasoning can be applied to the comings and goings of the Na+, K+ and Cl- ions which (in this view) determine the potential of the membrane. Koryta has formulated this theory by writing electrode kinetic equations similar to those that he behind the Buder-Volmer equation. Then one can write the sum of the fluxes for positive charges equal to the sum for the charges ... 

Another special case of the Buder-Volmer equation, Eq. (3.28), occurs when the overpotential is extremely small under this condition, one can consider the value of Ft]/RT to be small. In such a case, Eq. (3.28) can be approximated, based on the relations [(e " —e /2 = sinh x] and [sinhx = x, whenx—>0], to... 

Upon rearranging, the concentration dependent Buder-Volmer equation is obtained. 

The net rate of electrochemical current generation in an electrode section is given by the Buder-Volmer equation, a fundamental relation in electrode kinetics [109],... 

Expressions for the rates of these mechanistic reactions can be derived by assuming a reasonable adsorption isotherm, such as that proposed by Langmuir. For a PEMFC with Pt as the catalyst, it is generally agreed that the HOR process involves the Tafel and Volmer reactions, with the Tafel reaction being the rate-determining step. In this case, the rate of the reaction can be expressed in the form of the well-known Buder-Volmer (B-V) equation [8] ... 

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