کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1276760 | 1497597 | 2010 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Role of perfluorosulfonic ionomer as protective agent against strong adsorption of (bi)sulfate anions. Relevance in the determination of the area of Pt/C electrocatalysts Role of perfluorosulfonic ionomer as protective agent against strong adsorption of (bi)sulfate anions. Relevance in the determination of the area of Pt/C electrocatalysts](/preview/png/1276760.png)
This work aims to shed light on the wide dispersion of the values of the area of Pt/C electrodes reported when evaluated by means of the thin-film electrode approach. The effect of the Perfluorosulfonic Ionomer (PFSI) content of the electrodes and the nature of the electrolyte are discussed. The results disclose that the area of the Pt electrodes evaluated by electrochemical techniques is related to the actual PFSI content on the electrode and to the nature of the electrolyte. Using HClO4 as electrolyte, electrode area values are independent of the PFSI content. On the contrary, if experiments are recorded in H2SO4, the electrode area value increases with the increasing PFSI content, irrespectively of the Pt loading. Such effect is ascribed to the interaction of the sulfonic groups from the PFSI with the surface of the Pt nanoparticles, avoiding the strong adsorption of the bisulfate anions.
Journal: International Journal of Hydrogen Energy - Volume 35, Issue 20, October 2010, Pages 11576–11581