PtSnIr/C anode electrocatalysts: Promoting effect in direct ethanol fuel cells
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
27/05/2014
27/05/2014
12/07/2012
|
Resumo |
This study investigates the promoting effect of PtSnIr/C (1:1:1) electrocatalyst anode, prepared by polymeric precursor method, on the ethanol oxidation reaction in a direct ethanol fuel cell (DEFC). All of the materials used were 20% metal m/m on carbon. X-ray photoelectron spectroscopy (XPS) analysis showed the presence of Pt, PtOH 2, PtO 2, SnO 2 and IrO 2 at the electrocatalyst surface, indicating a possible decorated particle structure. X-ray diffractometry (XRD) analysis indicated metallic Pt and Ir as well as the formation of an alloy with Sn. Using the PtSnIr/C electrocatalyst prepared here with two times lower loading of Pt than PtSn/C E-tek electrocatalyst, it was possible to obtain the same maximum power density found for the commercial material. The main reaction product was acetic acid probably due to the presence of oxides, in this point the bifunctional mechanism is predominant, but an electronic effect should not be discarded. © 2012 Sociedade Brasileira de Química. |
Formato |
1146-1153 |
Identificador |
http://dx.doi.org/10.1590/S0103-50532012000600021 Journal of the Brazilian Chemical Society, v. 23, n. 6, p. 1146-1153, 2012. 0103-5053 1678-4790 http://hdl.handle.net/11449/73433 10.1590/S0103-50532012000600021 S0103-50532012000600021 2-s2.0-84863584663 2-s2.0-84863584663.pdf |
Idioma(s) |
eng |
Relação |
Journal of the Brazilian Chemical Society |
Direitos |
openAccess |
Palavras-Chave | #Electrocatalysis #Ethanol oxidation reaction #Fuel cells #Nanostructured materials #PtSnIr |
Tipo |
info:eu-repo/semantics/article |