Preparation of PtSnO2/C electrocatalysts using electron beam irradiation

Author(s)

Silva, Dionisio F. ^[1] ; Geraldes, Adriana N. ^[1] ; Oliveira Neto, Almir ^[1] ; Pino, Eddy S. ^[1] ; Linardi, Marcelo ^[1] ; Spinace, Estevam V. ^[1] ; Macedo, Waldemar A. A. ^[2] ; Ardisson, Jose D. ^[2]

Affiliation

^[1] IPEN CNEN SP, BR-05508900 Sao Paulo - Brazil

^[2] CDTN, Serv Nanotecnol, BR-31270901 Belo Horizonte, MG - Brazil

• Document type: Journal article
• Source: MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS; v. 175, n. 3, p. 261-265, DEC 15 2010.
• Web of Science Citations: 16

Abstract

PtSnO(2)/C electrocatalysts with Pt:Sn atomic ratios of 75:25, 50:50 and 25:75 were prepared in water/2-propanol using electron beam irradiation. The materials were characterized by energy-dispersive X-ray analysis, X-ray diffraction, Mossbauer spectroscopy and transmission electron microscopy. The electro-oxidation of ethanol was studied by chronoamperometry at room temperature and on direct ethanol fuel cell (DEFC) at 100 degrees C. The X-ray diffraction and Mossbauer measurements of the PtSnO(2)/C electrocatalysts showed typical face-centered cubic (fcc) structure of platinum and the presence of a SnO(2) phase (cassiterite). The PtSnO(2)/C electrocatalysts were active for ethanol electro-oxidation and the material with Pt:Sn atomic ratio of 50:50 showed the best performance. (C) 2010 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 07/08724-7 - Preparation of PtRu/C and PtSn/C electrocatalysts using electron beam for application as anode in direct alcohol fuel cell
• Grantee: Estevam Vitorio Spinacé
• Support Opportunities: Regular Research Grants