Electro-oxidation of Methanol, Ethanol and Ethylene Glycol over Pt/TiO2-C and PtSn/TiO2-C Anodic Catalysts
Year: 2021
Type: article
Abstract: This study focused on the use of a modified Pt/C anodic catalyst with doping tin (Sn) and titania (TiO 2 ) to improve the efficiency and effective of direct alcohols (methanol, ethanol and ethylene glycol) fuel cells. Decorated the TiO 2 dopant on active carbon support (xTiO 2 -C, x = 10, 20, 30, 40 weight percent) was completed by the impregnation method. Then, the series Pt/TiO 2 -C and PtSn/TiO 2 -C anodic catalysts were prepared by the formic acid reduction method using PtCl 4 and SnCl 2 .2H 2 O as platinum (Pt, 10 wt%) and tin (Sn, 10 wt%) precursors. The fabricated series anodic catalysts were painted on carbon paper as working electrodes. Evaluation of the catalytic activity for the electro-oxidation of alcohols on working electrodes was performed by cyclic voltammetry (CV) in 0.5 M H 2 SO 4 and 1 M alcohol electrolytes at room temperature. The results showed that all the doped TiO 2 and Sn anodic catalysts present well-dispersed platinum with a diameter around 3 - 5 nm. In addition, the activity for electro-oxidation of alcohols was affected remarkably by the content of TiO 2 and Sn in the anodic catalysts. Among the prepared Pt/TiO 2 -C and PtSn/TiO 2 -C anodic catalysts, the 30 wt% TiO 2 catalyst exhibited the best catalytic performance. In comparison with the various alcohols, the the tendency of activity for the ethanol electro-oxidation was : ethanol > methanol > ethylene glycol.
DOI: 10.20964/2021.10.08
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,670
OpenAlex ID: W3201056403