Direct Ethanol Fuel Cells: The influence of structural and electronic effects on Pt–Sn/C electrocatalysts
dc.contributor.author | Colmati, Flavio | |
dc.contributor.author | Magalhães, Monah M. | |
dc.contributor.author | Sousa, Ruy | |
dc.contributor.author | Ciapina, Eduardo G. [UNESP] | |
dc.contributor.author | Gonzalez, Ernesto R. | |
dc.contributor.institution | Universidade Federal de Goiás (UFG) | |
dc.contributor.institution | Pontifícia Universidade Católica de Goiás | |
dc.contributor.institution | Universidade Federal de São Carlos (UFSCar) | |
dc.contributor.institution | Universidade Estadual Paulista (Unesp) | |
dc.contributor.institution | Universidade de São Paulo (USP) | |
dc.date.accessioned | 2020-12-12T00:55:28Z | |
dc.date.available | 2020-12-12T00:55:28Z | |
dc.date.issued | 2019-11-05 | |
dc.description.abstract | Carbon-supported platinum-tin electrocatalysts (Pt–Sn/C) are known to be the most efficient fuel cell anode material to oxidize ethanol in the so-called Direct Ethanol Fuel Cells (DEFC). However, the platinum-tin binary system presents distinct phases depending on the amount of Sn (i.e., the Pt:Sn ratio) and on the thermal annealing temperatures, as well as the presence of oxides (e.g. SnO2) whose influence on the performance of DEFCs is not well understood. In this work, Pt–Sn catalysts presenting distinct Pt:Sn ratios were prepared, characterized and tested in a single DEFC. The combined results from DEFC tests and structural characterization techniques showed that increasing the amount of Sn dissolved into the Pt structure enhances DEFC performance but also that Sn content alone does not explain the overall behavior. Microstructural effects on the DEFC response was further investigated by performing a comprehensive study using high intensity X-ray Diffraction and in situ–X-Ray Absorption Spectroscopy provided by synchrotron light on Pt3Sn1/C samples subjected to thermal treatments in a reducing H2 atmosphere at temperatures of 100, 200, 300, 400, and 500 °C. The results showed that best DEFC performance depends on a balance between the amount of Sn dissolved in Pt, the formation of a new phase (PtSn) and also on the presence of tin oxides, yielding a material with an optimized modified 5d-band electronic structure, which was obtained with a thermal treatment at 200 °C. | en |
dc.description.affiliation | Universidade Federal de Goiás Instituto de Química, Avenida Esperança s/n | |
dc.description.affiliation | Pontifícia Universidade Católica de Goiás, Avenida Universitária 1440 | |
dc.description.affiliation | Universidade Federal de São Carlos Departamento de Engenharia Química, Rod. Washington Luís, km 235 | |
dc.description.affiliation | Sao Paulo State University (Unesp) School of Engineering, Av Dr. Ariberto Pereira da Cunha, 333 | |
dc.description.affiliation | Universidade de São Paulo Instituto de Química de São Carlos C.P. 780 | |
dc.description.affiliationUnesp | Sao Paulo State University (Unesp) School of Engineering, Av Dr. Ariberto Pereira da Cunha, 333 | |
dc.description.sponsorship | Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) | |
dc.description.sponsorship | Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) | |
dc.description.sponsorship | Fundação de Amparo à Pesquisa do Estado de Goiás | |
dc.description.sponsorship | Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) | |
dc.description.sponsorship | Laboratório Nacional de Luz Síncrotron | |
dc.description.sponsorshipId | FAPESP: 2009/07629-6 | |
dc.description.sponsorshipId | Fundação de Amparo à Pesquisa do Estado de Goiás: 201201270750433 | |
dc.description.sponsorshipId | CNPq: 475609/2008-5 | |
dc.description.sponsorshipId | CNPq: 554569/2010-8 | |
dc.format.extent | 28812-28820 | |
dc.identifier | http://dx.doi.org/10.1016/j.ijhydene.2019.09.056 | |
dc.identifier.citation | International Journal of Hydrogen Energy, v. 44, n. 54, p. 28812-28820, 2019. | |
dc.identifier.doi | 10.1016/j.ijhydene.2019.09.056 | |
dc.identifier.issn | 0360-3199 | |
dc.identifier.scopus | 2-s2.0-85072793743 | |
dc.identifier.uri | http://hdl.handle.net/11449/197972 | |
dc.language.iso | eng | |
dc.relation.ispartof | International Journal of Hydrogen Energy | |
dc.source | Scopus | |
dc.subject | DEFC | |
dc.subject | Direct ethanol fuel cells | |
dc.subject | Electrocatalysts | |
dc.subject | PEMFC | |
dc.subject | PtSn | |
dc.title | Direct Ethanol Fuel Cells: The influence of structural and electronic effects on Pt–Sn/C electrocatalysts | en |
dc.type | Artigo |