Au/C catalysts promoted with metal oxides for ethylene glycol electro-oxidation in alkaline solution
Journal article
Authors/Editors
Strategic Research Themes
No matching items found.
Publication Details
Author list: Yongprapat S., Therdthianwong A., Therdthianwong S.
Publisher: Elsevier
Publication year: 2013
Journal: Journal of Electroanalytical Chemistry (1572-6657)
Volume number: 697
Start page: 46
End page: 52
Number of pages: 7
ISSN: 1572-6657
Languages: English-Great Britain (EN-GB)
View in Web of Science | View on publisher site | View citing articles in Web of Science
Abstract
The Au-based catalysts on metal oxide (MexOy)- promoted carbon supports were prepared by polyvinyl alcohol (PVA) protection method and tested in ethylene glycol electro-oxidation. Three types of Me xOy promoters, CeO2, Fe2O 3 and RuO2, and different Au:MexOy weight ratios of 1:0.25, 1:0.5 and 1:1 were studied. Highly dispersed Au nanoparticles with the average particle sizes approximately 4 nm were obtained for all the catalysts. The activity and stability of the catalysts towards ethylene glycol electro-oxidation in alkaline were investigated via cyclic voltammetry and chronoamperometry, respectively. It was found that the electrocatalytic properties of the promoted catalysts were affected by the type and the Au:MexOy ratio. Both types of Fe2O 3- and RuO2-promoted catalysts yielded higher mass-normalized current density than the unpromoted Au/C. The most stable catalyst in a high mass-normalized current density region was Au-RuO 2/C at Au:RuO2 ratio of 1:0.25. The RuO 2-promoted catalysts were still active even in the potential region where the catalyst surface was fully covered by Au oxide film. In comparison with PtRu/C, the promoted Au catalysts generated higher mass-normalized current density. ฉ 2013 Elsevier B.V. All rights reserved.
Keywords
Alkaline exchange membrane fuel cells, Ethylene glycol electro-oxidation, Promoted-Au catalysts
Contact Information