Repository logo
 

Publication:
PtSnIr/C anode electrocatalysts: Promoting effect in direct ethanol fuel cells

Loading...
Thumbnail Image

Advisor

Coadvisor

Graduate program

Undergraduate course

Journal Title

Journal ISSN

Volume Title

Publisher

Type

Article

Access right

Acesso abertoAcesso Aberto

Abstract

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.

Description

Keywords

Electrocatalysis, Ethanol oxidation reaction, Fuel cells, Nanostructured materials, PtSnIr

Language

English

Citation

Journal of the Brazilian Chemical Society, v. 23, n. 6, p. 1146-1153, 2012.

Related itens

Sponsors

Units

Departments

Undergraduate courses

Graduate programs