Ethanol oxidation reaction on IrPtSn/C electrocatalysts with low Pt content

Author(s)

Júlio César M. Silva ^[1] ; Beatriz Anea ^[2] ; Rodrigo Fernando B. De Souza ^[2] ; Mônica Helena M. T. Assumpção ^[4] ; Marcelo L. Calegaro ^[4] ; Almir O. Neto ^[5] ; Mauro C. Santos ^[2]

Affiliation

^[1] Universidade Federal do ABC. Centro de Ciências Naturais e Humanas. Laboratório de Eletroquímica e Materiais Nanoestruturados - Brasil

^[2] Univ Fed ABC, Ctr Ciencias Nat & Humanas, Lab Eletroquim & Mat Nanoestruturados, BR-09210170 Santo Andre, SP - Brazil

^[3] Universidade Federal do ABC. Centro de Ciências Naturais e Humanas. Laboratório de Eletroquímica e Materiais Nanoestruturados - Brasil

^[4] Univ Sao Paulo, Inst Quim Sao Carlos, Grp Mat Eletroquim & Metodos Eletroanalit, BR-13566590 Sao Carlos, SP - Brazil

^[5] Inst Pesquisas Energet & Nucl Comissao Nacl Energ, BR-05508900 Sao Paulo - Brazil

• Document type: Journal article
• Source: Journal of the Brazilian Chemical Society; v. 24, n. 10, p. 1553-1560, 2013-10-00.

Abstract

In this work, the ethanol oxidation reaction (EOR) was investigated using ternary nanostructured materials composed of IrPtSn/C in mass proportions of Ir:Pt:Sn at 60:30:10, 60:20:20 and 60:10:30, prepared with a polymeric precursor method and compared with commercial electrocatalyst PtSn/C E-TEK. X-ray diffractometry was used to obtain information about the structure of the material. The transmission electron microscopy showed particle sizes of 5-7 nm. The electrocatalytic activity was investigated using chronoamperometry experiments at 0.5 V vs. RHE and by in situ Fourier transform infrared spectroscopy by attenuated total reflectance (FTIR-ATR) experiments. From in situ FTIR-ATR experiments, it can be seen that using the best material IrPtSn/C 60:20:20, the acetaldehyde was produced at high intensities and CO2 at lower intensities. The use of IrPtSn/C 60:20:20 materials became possible to diminish the Pt fraction to ca. 73% in comparison to the PtSn/C E-TEK electrocatalyst, with an improvement of ca. 282% in the current density of the chronoamperometric experiments. (AU)

• FAPESP's process: 09/09145-6 - Study of ethanol electrochemical oxidation mechanism on PtSn, PtCe and PtSnCe using in-situ spectroscopic techniques
• Grantee: Rodrigo Fernando Brambilla de Souza
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 10/16511-6 - Energy generation from biofuel using nanostructures
• Grantee: Mauro Coelho dos Santos
• Support Opportunities: Regular Research Grants
• FAPESP's process: 10/07831-7 - Synthesis and characterization of PtSn/C, PtIr/C and PtSnIr for the study of the mechanism of ethanol electrochemical oxidation using spectroscopic in situ techniques
• Grantee: Júlio César Martins da Silva
• Support Opportunities: Scholarships in Brazil - Doctorate