کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
182402 | 459424 | 2007 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Ethanol electro-oxidation on catalysts with TiO2 coated carbon nanotubes as support Ethanol electro-oxidation on catalysts with TiO2 coated carbon nanotubes as support](/preview/png/182402.png)
Pt–TiO2/CNTs electrocatalysts for direct ethanol fuel cells (DEFCs) were prepared by sol–gel and ethylene glycol reduction method. XRD and TEM showed that the size of the Pt particles on TiO2/CNTs is 3.5–4 nm and with narrow particle size distribution. HRTEM revealed that a thin layer of uniform amorphous TiO2 on CNTs was formed and the faces of the Pt crystal on Pt–TiO2/CNTs catalysts were quite “rough” and “rounded” and some grain bounders and/or twins also appeared. The electrochemical studies using cyclic voltammetry (CV), chronoamperometry and CO stripping voltammetry indicate that Pt–TiO2/CNTs catalysts have higher electro-catalytic activity and CO-tolerance for ethanol oxidation than Pt/C (20 wt% Pt, E-TEK) and Pt/CNTs catalyst in acid. The Pt/TiO2 molar ratio was also optimized and proved that 1:1 was the best Pt/TiO2 molar ratio.
Journal: Electrochemistry Communications - Volume 9, Issue 6, June 2007, Pages 1416–1421