کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
182333 | 459423 | 2008 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Use of Butler–Volmer treatment to assess the capability of the voltammetric ion sensors: Application to a PPy/DBS film for cations detection Use of Butler–Volmer treatment to assess the capability of the voltammetric ion sensors: Application to a PPy/DBS film for cations detection](/preview/png/182333.png)
In this work, the Butler–Volmer formalism has been used to obtain a new equation to assess the calibration of voltammetric ion sensors. This new method postulates a direct relationship between the mid point reversible potential, ER, and the logarithm of the electrolyte concentration. In the same way as the other relationships based on the Nernst equation, a positive slope is expected for a cationic exchanging system, and a negative one for an anionic sensor. However, the theoretical slope proposed in this work includes the electron-transfer coefficient, which allows us to explain the slopes frequently reported in the literature non coincident with the ideal value estimated from the Nernst equation: 2.303RT/nF. Also, comments are made on results from other literature with respect to the new equation, and an application of this method to PPy/DBS films as a cation sensor is carried out.
Journal: Electrochemistry Communications - Volume 10, Issue 2, February 2008, Pages 190–194