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

Journal of the Brazilian Chemical Society

De Souza, Rodrigo Fernando B.¹  Anea, Beatriz¹  Calegaro, Marcelo L.¹  Comissão Nacional de Energia Nuclear, São Paulo, Brazil¹  O. Neto, Almir¹  Assumpção, Mônica Helena M. T.¹  Santos, Mauro C.¹  Universidade de São Paulo, São Carlos, Brazil¹  Silva, Júlio César M.¹  Universidade Federal do ABC, Santo André, Brazil¹ 

关键词: IrPtSn/C;    electrocatalysts;    ethanol oxidation reaction;    FTIR-ATR;   

DOI  :  10.5935/0103-5053.20130196

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

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.

【 授权许可】

Unknown